{"id":228790,"date":"2022-03-21T02:11:15","date_gmt":"2022-03-21T09:11:15","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/java\/?p=228790"},"modified":"2022-03-21T02:11:15","modified_gmt":"2022-03-21T09:11:15","slug":"java-on-visual-studio-code-update-march-2022","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/java\/java-on-visual-studio-code-update-march-2022\/","title":{"rendered":"Java on Visual Studio Code Update \u2013 March 2022"},"content":{"rendered":"

Hi everyone, welcome to the March update of Visual Studio Code Java. This time we are going to bring you some recent update regarding our code completion optimization, Maven improvements and pre-release version of our Java extensions. Let’s get right into it!<\/p>\n

More shortcuts to generate code snippets<\/strong><\/span><\/h2>\n

Because our language support for Java is provided via Eclipse \u2122 JDT Language Server, <\/a>the shortcuts to generate certain code snippets (such as System.out.println<\/span>) are mostly based on Eclipse convention. For example, the shortcut for System.out.println()<\/span> is sysout<\/span>. However, we heard from a lot of users that they are used to shortcuts from other IDEs such as IntelliJ IDEA and would like to see shortcuts from these IDEs supported in Visual Studio Code as well. Therefore, we have added these shortcuts for common code snippets in our extensions. Here is a list of the shortcuts we support<\/p>\n\n\n\n\n\n\n\n\n
Code template<\/td>\nEclipse-style shortcuts<\/td>\nIDEA-style shortcuts<\/td>\n<\/tr>\n
System.out.println()<\/span><\/td>\nsysout<\/span><\/td>\nsout<\/span><\/td>\n<\/tr>\n
System.err.println()<\/span><\/td>\nsyserr<\/span><\/td>\nserr<\/span><\/td>\n<\/tr>\n
System.out.println() for current method signature<\/span><\/td>\nsystrace<\/span><\/td>\nsoutm<\/span><\/td>\n<\/tr>\n
public static void main(String[] args) {}<\/span><\/td>\nmain<\/span><\/td>\npsvm \/ main<\/span><\/td>\n<\/tr>\n
Iterator (for loop)<\/span><\/td>\nforeach<\/span><\/td>\niter<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A quick demo to showcase these new shortcuts<\/p>\n

\"More<\/a><\/p>\n

Code completion optimization for constructors (new<\/span> keyword)<\/strong><\/span><\/h2>\n

Regarding the code completion, one of the top issues is that when writing a constructor in VS Code, developers expect that the suggestion should be directly related to the type that is defined (for example, List<String> list = …<\/span>\u00a0 should prompt a List type auto-suggestion for “…” part), however, this is often not the case in the current implementation.<\/p>\n

During the last few iterations, we have investigated this issue and made changes to improve this experience. With these new improvements, the code completion will be more aware of the type that user is creating and suggests the most relevant type for the constructors. For example, a List<String><\/span> will result in a suggestion for new ArrayList<String><\/span>. Similarly, a String[]<\/span> will result in a suggestion of an array type to complete the constructor. Here is a sneak peek for this improvement:<\/p>\n

\"Constructor<\/a><\/p>\n

We are still making a few tweaks to the feature above and it will be available in the next few versions.<\/p>\n

Earlier this year, we released our roadmap for 2022<\/a> and better code completion experience is one of our major investments. We hope to continue improving this area so please let us know if you’d like to see any other enhancements regarding code completion quality and performance.<\/p>\n

Maven improvements<\/strong><\/span><\/h2>\n

In addition to new features of code completion, we have also made a few improvements to our Maven extension.<\/p>\n