Json Arraylist

An HTMLCollection (previous chapter) is a collection of HTML elements. gt1329a Are you saying you have a JSON string, not the array literal you posted at first? If you have a string of JSON, you can use JSON. It is easy for humans to read and write. It also provides an unmodifiable list view of the values in the array. こんにちは!フリーランスの長野です。 JavaでJSONデータって使っていますか?JSONデータを使うことで、データベースをテキスト形式で簡単にかつ軽量に扱うことができるので便利です。. learnprogramming) submitted 6 years ago by Phenomena0 I've been wanting to play around with the WoWArmory API, which when called returns some JSON. Merge (or add) two arrays into one Tag(s): Language The easy way is to convert the arrays into Lists, add one into another and finally convert back to an array. Linq Public Module JsonExtensions Public Function FindTokens(containerToken As JToken, name As String) _ As List(Of JToken) Dim matches = New List(Of JToken)() FindTokens(containerToken, name, matches) Return matches End Function Private Sub FindTokens(containerToken As JToken, name As String, _ matches As. you have to add each item of the array as JSONObject as an index of the arraylist. For Loop 14 7 39 40 Advanced For Loop 14 7 39 40 While Loop 14 7 39 40 Iterator 14 7 39 40. DataWeave Mapping ArrayList elements. This video shows 1. How do I convert a JSON file to a Windows PowerShell object? Use the Get-Content cmdlet with the Raw parameter: Get-Content -Raw -Path. In this tutorial, I’ll show you how to write JSON data to a file using JSON. JSON (JavaScript Object Notation) is a lightweight data-interchange format. Hi, There are a few threads on this already which I have read but am still unsure. For Loop 14 7 39 40 Advanced For Loop 14 7 39 40 While Loop 14 7 39 40 Iterator 14 7 39 40. Convert SQL Server results into JSON July 12, 2016 by Sifiso W. If the value is not of Type Dictionary then I check if it is of Type ArrayList and if it is, then I loop through the items and add them as the final TreeNode. Above JSON file simply explain that there an object inside an object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of. 1 day ago · We use cookies for various purposes including analytics. Unlike simple arrays, ArrayLists are designed to have no fixed size – contents can be added or removed while the program is running. I am writing a program that reads from DB and outputs to a CSV file. Android JSON parsing will be very handy when we develop applications that send and receive data from the server. NET has a range of built in options to fine tune what gets written from a serialized object. JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. In this episode we will look at how to post json to spring controller and have it automatically convert JSON to arraylist, object or multiple objects. For Student class use in this example you can find it the previous example on How do I convert object into JSON?. parse() or $. Below is a simple example showing how to create a list of array elements in java. This video shows 1. IEnumerable. The first time, we used an ArrayList of ArrayList, while the second time, we used an ArrayList of 2-D ArrayList. NET Forums / General ASP. Because JSON syntax is derived from JavaScript object notation, very little extra software is needed to work with JSON within JavaScript. Then explicit iteration is required to get ArrayList as no inbuilt function exists. for update it will has PUT value). A cell grows. * @brief Internal methods for working with json_type_array objects. com is for Java and J2EE developers, all examples are simple and easy to understand, and well tested in our development environment. Main is pretty straight forward. ArrayList, and MIME media type, application/json,. Serializing list is a little tricky since by default the type info is not stored while serializing and deserializing lists. We modify our test program telling it to create an Order java oject starting from its JSON representation saved in the string. I've read about GSON and a few article to do this but i still don't understand. Now we are going to read this json file using the AngularJs http get method. Kotlin – Convert Object to/from JSON with Gson. This allows us to do more useful things with the structured data our remote url returns to our. This article shows how to leverage Jackson 2 to read non-standard JSON input - and how to map that input to any java entity graph with full control over the mapping. This article demonstrates how to serialize. The task turns out to be non trivial as there are a few gotchas needed to be handled because of the way the webservice is implemented. xml に追加されます。. Here's a quick example that uses OPENJSON with a schema for the output that you explicitly specify in the WITH clause. Instead of just dumping all the json in one line, we instead format it and indent it for readability purposes. Linq Public Module JsonExtensions Public Function FindTokens(containerToken As JToken, name As String) _ As List(Of JToken) Dim matches = New List(Of JToken)() FindTokens(containerToken, name, matches) Return matches End Function Private Sub FindTokens(containerToken As JToken, name As String, _ matches As. json JSR 374 (JSON Processing) Default Provider. util package. The Jackson ObjectMapper can parse JSON from a string, stream or file, and create a Java object or object graph representing the parsed JSON. To go from a string to the data\object you need to deserialize, so google "c# deserialize json string" for examples. CSV files and tab-delimited files used to be very common forms for data storage. Here we are creating List of student objects and passing this list into gson. A JSON "object" is returned as a Java Map object, currently a HashMap. A JSON value can be another JSON object, array, number, string, boolean (true/false) or null. jettison-1. Attendees; CalendarContract. Unable to produce JSON response for an arraylist contaning java beans. An object is an unordered collection of zero or more name/value pairs. At this point we have our JSON saved in a String, so we can try to make deserialization using the readValue. I have created a RESTful service using JAX-RS API 2. If your Android app is depending on sending and receiving data over the Internet e. Demonstrates accessing some data from an Estimote REST API response. Create an ArrayList. Include Jackson 2 dependency in your application project. JSON (JavaScript Object Notation) is a lightweight data-interchange format. Jaxb ArrayList Question. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Solution: What are you looking to do with the data? It looks like a better fit for a key-value pair (which is essentially all that JavaScript objects are),. Because some languages are providing the inbuilt functions to work with JSON. I was wondering if anyone had any suggestions. JavaScript Object Notation (JSON) is a lightweight, text-based, open-standard that is designed for data interchange. How to convert Java Array/Collection to JSON array? Java 8 Object Oriented Programming Programming Google provides a library named org. It is used for reading and writing JSON among other tasks. Go to Android Development Tutorials to get list of all Android Tutorials. In this tutorial, we saw how to create JSON object in JavaScript, converting JSON object to JSON string and parsing back the JSON string to JSON object. In JSON, array values must be of type string, number, object, array, boolean or null. I have been told, that support for indexing into dynamic types already. You can also read the file with any Java File Reader such as BufferedReader; data = FileUtils. Straight forward and clear cut examples, but i have 1 question as i am a beginner. Now to the conversion (casting) of a PHP Array into a PHP Object. JSON is becoming the default when. JSON stands for JavaScript Object Notation is the most popular way to serialize and transmitting data over network. NET Web Api REST service from a. Note that if the Collection has different types of objects then there is no way to serialize it. We will look at the following annotations:. I am writing a program that reads from DB and outputs to a CSV file. An object is an unordered collection of zero or more name/value pairs. An array is an ordered sequence of zero or more values. Method 1: Initialization using Arrays. "JSON parse error: Cannot deserialize instance of java. Pretty Print JSON" button, and see pretty. Q&A for Work. txt having collections of students data in JSON form and through these Jacson API’s will convert JSON data to ArrayList java object. Now a days everything is transferred between the systems is JSONObject. Sqlify's New Pay As You Go Pricing Convert between CSV, JSON and SQL files in PHP using the Sqlify API Convert and flatten JSON to CSV or SQL using JSON path expressions One-liner to migrate data from MongoDB to MySQL from your shell Uploading a big file to the Sqlify API in chunks. JSON (an acronym for JavaScript Object Notation) is a lightweight data-interchange format and is most commonly used for client-server communication. Pretty print JSON 4. Use ARC to insert any values in json array using python. readValueAsTree() call allows to read what is at the current parsing position, a JSON object or array, into Jackson’s generic JSON tree model. For example, let’s say we want to define a simple schema for an address made up of a number, street name and street type:. JSON is becoming the default when. Because JSON syntax is derived from JavaScript object notation, very little extra software is needed to work with JSON within JavaScript. I had to. The text version of this. Array is a fixed size collection whereas an ArrayList's size can be dynamically increased or decreased. How to populate Android list view from json In this post I'm going to illustrate how to add items to Android list view from data in json format. 一、Json转换DataTable. Let’s talk about a single dimension array. JavaScript Object Notation (JSON) is a convenient way to pass values back and forth between your website pages. This should not be overblown, however, because XML is still very heavily used in the Web, and it is the only option for apps that use SOAP. XML and JSON files. Most Internet services will serve “send” you the data you requested “using HTTP GET/POST request” in JSON format. A note of caution: If you are wondering why json_encode() encodes your PHP array as a JSON object instead of a JSON array, you might want to double check your array keys because json_encode() assumes that you array is an object if your keys are not sequential. JavaScript Object Notation (JSON) is a lightweight, text-based, open-standard that is designed for data interchange. parse() takes a JSON string and transforms it into a JavaScript object. x benchmark with full stacks Reset Zoom. This site uses cookies for analytics, personalized content and ads. To serialize a collection - a generic list, array, dictionary, or your own custom collection - simply call the serializer with the object you want to get JSON for. Download java-json. That’s all on this post about How to remove object from ArrayList in Java. JSON stands for JavaScript Object Notation, and it is based on a subset of JavaScript. The class you are deserialising to is an object that has a property called PlanID etc. NET – Reducing Serialized JSON Size. Do not forget to check for latest dependency at maven site. Jackson data binding example – Map & JSON Example to convert Java Map to / from JSONJackson Tree Model example Read JSON into Tree, like DOM […]. It is the alternative to XML parsing. Android provides four different classes to manipulate JSON data. JSON takes over where XML left off. Search: C# foreach Loop Examples Loop over elements with the foreach keyword. HTTP allows different protocols to be used for the communication between the client and the server. Unable to produce JSON response for an arraylist contaning java beans. asList() method. In this tutorial we will learn how to serialize and de-serialize an ArrayList. Serialize an Object. Accessing Array Values. Here we are sharing multiple ways to initialize an ArrayList with examples. getJSON( "js/settings. In this Java tutorial, we will convert JSON Array to String array in Java and subsequently create JSON from Java String Array. Hi, I need to populate a Combobox , so for this I have loaded some data from my Database into an ArrayList and converted it into JSON Using [code= how to convert java ArrayList into JSON format data? (JSP forum at Coderanch). It won't serialize to XML, only JSON. The JSON filename extension is. * @return A List of the String representation of each item in * the JSON array. json) library to read or parse JSON file. How to convert an array to ArrayList in java By Chaitanya Singh | Filed Under: Java Collections In the last tutorial we have shared two methods of converting an ArrayList to Array with example. How do I convert Map into JSON? By Wayan Saryada in Google Gson Last modified: July 22, 2019 1 Comment This example show you how to convert a java. NET framework 2. In this tutorial we will go over steps on how to convert Java. simple to encode or decode JSON text. Example will use following Test data private ArrayList testData1() { ArrayList list = new ArrayList(); list. Java provides different ways to Base64 encode and decode a byte[]. [code]import com. Let us try to convert the searched nodes directly into an object representation. When testing an API, you typically make a request to a resource, (e. 需求:有一个log文件,需要整理成Excel,日志文件里面的数据都是json字符串. It's similar to Java Architecture for XML Binding (JAXB), which is used to convert Java objects to and from XML. I use an ArrayList> contactList; to load some content download by a web URL with my Android APP. Introduction I recently have to write a client to consume a restful webservice using Spring RestTemplate class. ArrayList is part of collection framework in Java. So to start off, you can think of Gson as a transformer between objects like strings and ints (which includes arrayLists of these types!) and Json as a transformer between Json and Shared Preferences. Json then the code should look something like this. Deserialization. There are many ways to read a file in Java. Jackson JSON Java Parser is very popular and used in Spring framework too. The canonical reference for building a production grade API with Spring. [2005] Passing Arraylist to Webservice Created in Vb 2005 Hi, i have a webservice which comminicates with the Bussiness layer of my application. Convert a Java collection/list/string[] array into JSON. I will use following json format to populate the list view. CalendarAlerts. Action must have a public “setter” method for fields that must be populated. You can get that from NuGet. json形式のレスポンスを準備するには、最初にレスポンスのmimeタイプをjson形式に設定する必要があります。 注意: ウィザードにより、サーブレット名とURLパターンが自動的に web. Join GitHub today. This is a picker view for android , support linkage effect, timepicker and optionspicker. Sometimes you may want to return an empty JSON object from a Spring Framework controller action, be it in a REST API or just a regular controller action. JSON to HashMap - Parsing JSON String Recursivey Parsing JSON String to HashMap Json String can contain JsonArray, List < Author > list = new ArrayList < Author. Participant. The easiest way to accomplish what you are trying to do would be to use an array instead of a ArrayList: declare Person firstName : String. To create a JSON serialization extension method, use the following code:. ArrayList is one of the most commonly used collection classes of the Java Collection Framework because of the functionality and flexibility it provides. In this article, I am going to explain how you to transform an incoming payload (JSON) to a Java object. NET using Json. The simplest adapter to use is called an ArrayAdapter because the adapter converts an ArrayList of objects into View items loaded into the ListView container. Then we serialize the same POJO using writeValue and writes the JSON to a file. Accessing Array Values. I want to transform this into JSON , so that i can access the data and proceed further. It is an independent data exchange format and is the best alternative for XML. JavaScript Object Notation (JSON) is a convenient way to pass values back and forth between your website pages. Windows Server > Windows PowerShell. Android tutorial about implementing multilevel list view. For Array objects, the toString method joins the array and returns one string containing each array element separated by commas. Different Approaches To Sorting Elements of an ArrayList in Java Learn different approaches for sorting elements of an ArrayList. ArrayList out of VALUE_STRING token 2018年04月19日 17:14:45 z_k_h 阅读数 17030 版权声明:本文为博主原创文章,遵循 CC 4. In fact, there are a number of scenarios that would benefit from dynamic typing in my opinion in addition to interop with other dynamic code. To create a JSONObject from a properly formatted JSON string, you simply call the appropriate constructor. Though, this is a trivial example and actual object could be more complex, it demonstrate the process of creating Java object from JSON String. Jackson is one of the most common Java libraries for processing JSON. To parse JSON strings use the native JSON. Clone via HTTPS Clone with Git or checkout with SVN using the repository's web address. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. Let us try to convert the searched nodes directly into an object representation. There are different ways to create a copy of an object; the following is just one way and is presented to explain how Array. The following code creates a copy of a given object. I am using Jersey's POJO mapping feature to map JSON responses to Java objects. Most of the developers choose Arraylist over Array as it's a very good alternative of traditional java arrays. add("val1"); list. each() JSON. JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. A serializer allows to convert a Json string to corresponding Java type and a deserializers allows to convert from Java to a JSON representation. So it's obviously now that output is either JSON list or Java ArrayList as expected. zip( 81 k) The download jar file contains the following class files or Java source files. As an alternative to using @XmlRootElement and Collection wrappers, one can provide an Object factory which will tell JAXB how to marshal a given type (in case of Collections - its template type). Returning List and ArrayList from Web Service Method When working with web services sometimes we need to return a collection of objects. In ARC select POST option while you insert any values. JSON can represent two structured types: objects and arrays. toBean(JSONObject jsonObject, Class beanClass, Map classMap) Creates a bean from a JSONObject, with a specific target class. The methods in this class can be chained to add multiple values to the array. you have to add each item of the array as JSONObject as an index of the arraylist. 2) Create an ArrayList and copy the element of string array to newly created ArrayList using Arrays. We can also create an array whose elements are a list. I want to send this data to that calling JSP and there I can render the data. NET type objects into JSON-encoded data and then deserialize data in the JSON. JSON is used to parse the data between the server and the client. Different Approaches To Sorting Elements of an ArrayList in Java Learn different approaches for sorting elements of an ArrayList. This tutorial will cover how to fetch and parse JSON from a remote server on Android. You're using the write objects, just the wrong methods. Arraylist class implements List interface and it is based on an Array data structure. Deserialization. The default JSON output that is provide by Gson is a compact JSON format. Convert JSON to Java Object Here’s an example on how you can convert json to java object. How jsonschema2pojo maps format values to Java types:. An array features numeric indices, hence we obtain numbers starting from 0 and going up to N – 1, where N is the number of elements in the array. The ConvertTo-Json cmdlet converts any object to a string in JavaScript Object Notation (JSON) format. 32 lines (31 sloc) 668 Bytes Raw Blame History {". 5, includes support for Enums in JSONArray and JSONObject. How to Deserialize a JSON array in C# Jul 21 2015 2:34 AM I am struggling with a subject that has a lot of variants in this forum but I can't seem to find one that suits me, and I think it's because of the way that my JSON array is :( I'm not an expert but I already manage to "almost" get the end. Two scalar values are comparable if they have the same JSON_TYPE() types, with the exception that values of types INTEGER and DECIMAL are also comparable to each other. The methods in this class can be chained to add multiple values to the array. Text input that converts between a delimited string and an array of strings. JSON to HashMap - Parsing JSON String Recursivey Parsing JSON String to HashMap Json String can contain JsonArray, List < Author > list = new ArrayList < Author. You can also use other JSON library like GSON instead of Jackson to convert JSON String to Java object. 这里的关键词是 ArrayList 和 START_OBJECT标记 。 您不能将单个对象反序列化为对象数组。 试着理解这一点,你就会明白为什么。 您只能将一 组 JSON对象 反序列 化为一个数组或POJO集合。 请注意,虽然JSON对象由 { } 大括号 分隔 ,但数组由 [ ] 括号 分隔 ,其中包含. I figured out how to get the user to convert, I don't know how to use the syntax for the array This is in the driver: // Convert a Use. The result is pretty same as previously, only here it converts the objects to an ArrayList, which in some cases might be more useful to have it as an ArrayList. Using Jackson, you can easily handle automatic conversion from Java objects to JSON and back. removeAttr() alongside. In this Java tutorial, you gonna learn how to convert Java Array to JSON array. gt1329a Are you saying you have a JSON string, not the array literal you posted at first? If you have a string of JSON, you can use JSON. ArrayList has several constructors and we will present them all in this section. Net Arrays Arrays are using for store similar data types grouping as a single unit. This tutorial demonstrates how to do Android JSON Parsing and display with RecyclerView or ListView. In android, application uses JSON to transmit data over networks and JSON data is parsed, while it is received from cloud servers and from some where else. Paths that select elements not found in X are silently ignored. I have created a RESTful service using JAX-RS API 2. How to read all elements in ArrayList by using iterator? How to copy or clone a ArrayList? How to add all elements of a list to ArrayList? How to delete all elements from my ArrayList? How to find does ArrayList contains all list elements or not? How to copy ArrayList to array?. * Although this is exposed by the json_object_get_array() method, * it is not recommended for direct use. This allows us to do more useful things with the structured data our remote url returns to our. If your Android app is depending on sending and receiving data over the Internet e. In other words, we can encode and decode JSON object in java using json. int[] your_array = JsonConvert. Conversion of object to Json is pretty simple, can be easily achieved by adding Newtonsoft JSON. In this video we learn, how we can save a List of custom Objects to Shared Preferences using Google's GSON Library. The JSON is used as a data which need to be processed. This is a picker view for android , support linkage effect, timepicker and optionspicker. Gson fromJson method is used to convert JSON String or JsonObject or Reader to the corresponding object. parse() to convert it to an array in most newer browsers and eval() in older ones (or $. The properties are specified via @JsonProperty annotations - work for both serialization and deserialization you can inherit the ArrayList as per your requirements The magic lies in specifying the @JsonFormat on. But fortunately, we are lucky enough that Google has provided a library named org. An implementation may provide an option to use proto field name as the JSON name instead. For Student class use in this example you can find it the previous example on How do I convert object into JSON?. NET, and pushing out the old and tired stock. Payload Transformation: JSON to Object See how to transform an incoming JSON payload into a Java object. JSON objects are easy to read and write and most of the technologies provide support for JSON objects. var jsonData = JSON. Finally we will see a production level json and we will try to parse it. In the second part, we'll convert the JSON String to Java HashMap objects, which is similar to receiving a JSON response from web service and then creating an HashMap of domain objects from them. Instead of converting the JSON string to an ArrayList or even a Map, you can just create a JSONObject itself. the number of entries in the JSON response. Paths that select elements not found in X are silently ignored. ArrayList: Dynamic sized arrays in Java that implement List interface. How to populate Android list view from json In this post I'm going to illustrate how to add items to Android list view from data in json format. {"widget": { "debug": "on", "window": { "title": "Sample Konfabulator Widget", "name": "main_window", "width": 500, "height": 500 }, "image": { "src": "Images/Sun. Array is a fixed size collection whereas an ArrayList's size can be dynamically increased or decreased. This is a reference implementation. Would be very grateful for suggestions. Jackson provide api’s to convert JSON data to Collections Objects like Map, ArrayList etc. S All examples are tested by Gson 2. How to copy or clone a ArrayList? How to add all elements of a list to ArrayList? How to delete all elements from my ArrayList? How to find does ArrayList contains all list elements or not? How to copy ArrayList to array? How to get sub list from ArrayList? How to sort ArrayList using Comparator? How to reverse ArrayList content?. As a data-exchange format, it is widely used in web programming. An implementation may provide an option to use proto field name as the JSON name instead. However, the problem is that Collections are generic and the generic type information is not maintained in the json. Could the following pattern be of use? The @JsonCreator neatly creates your object as specified by the provided JSON. The tutorial intended to make the users learn on the process how to populate a drop down box with the help of a Select tag. Used Java Library. JSON 은 속성, 값의 쌍으로 이루어진 데이터 오브젝트로 서버와의 통. In this tutorial, we will show you how to use Gson to convert Java object to / from JSON. Jackson data binding example - Map & JSON Example to convert Java Map to / from JSONJackson Tree Model example Read JSON into Tree, like DOM […]. Below is a simple example showing how to create a list of array elements in java. Method 1: Initialization using Arrays. In the set up, we will create a sample class NavItem and a json array to represent navigation elements. NET ? Below is a sample code snippet demonstrating how you can deserialize an object from Json string to VB. JSON Uses JavaScript Syntax. In the last post we discussed about class ArrayList in Java and it's important methods. A JSON "array" is returned as a Java Collection object, currently an ArrayList. It is easy for machines to parse and generate. json包下JSONArray的静态方法:fromObject(list) 这是网上大多是都是直接用此方法快捷转换JSON,但是对于Hibernate级联操作关联的对象,这个方法就会报错,如果将映射文件中的级联配置去掉就行了。. In this tutorial, we will show you how to use Jackson 2. You can also use other JSON library like GSON instead of Jackson to convert JSON String to Java object. JSON to HashMap - Parsing JSON String Recursivey Parsing JSON String to HashMap Json String can contain JsonArray, List < Author > list = new ArrayList < Author. Let's get going. JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. @JsonComponent is annotation using that we can customize the JSON request or response. Net Object [Answered] RSS 2 replies Last post Sep 15, 2016 03:14 AM by Deepak Panchal. See this example - JQuery Loop Over JSON String. Next, let's convert the object into JSON by using ConvertTo-Json. Join GitHub today. This class allows setting up certain features, such as - allowing null serialization or setting up custom serializing policies. ArrayList is part of collection framework in Java. Example 1: Convert list to array. The task turns out to be non trivial as there are a few gotchas needed to be handled because of the way the webservice is implemented. Find file Copy path Fetching contributors… Cannot retrieve contributors at this time. Below we will serialize a java object into json using gson. One of these is DatatypeConverter. gt1329a Are you saying you have a JSON string, not the array literal you posted at first? If you have a string of JSON, you can use JSON. I also use json. Include Jackson 2 dependency in your application project. parse() to convert it to an array in most newer browsers and eval() in older ones (or $. You will need to know what type you are expecting and cast the return object to that type or manually check the type and then cast. It is easy for machines to parse and generate. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: