It is required when the workspace has multiple java projects, otherwise the expression evaluation and conditional breakpoint may not work.

There could be duplicated class names in different projects. projectName - The preferred project in which the debugger searches for classes.This option allows the debugger to look for source code in extra directories. The debugger looks for source code from project settings by default. sourcePaths - The extra source directories of the program.timeout - Timeout value before reconnecting, in milliseconds (default to 30000ms).an integer pid - Attach to the specified local process.'$ - Use process picker to select a process to attach.args - The command line arguments passed to the program./path/to/Main.java - The file path of the main class./ - The fully qualified module name and class name.If not specified, the debugger automatically resolves the possible main class from current project. mainClass - The fully qualified name of the class containing the main method.Please also check the documentation of Language Support for Java by Red Hat if you have trouble setting up your project. Open a Java file to activate the extensions.Open a Java project (Maven/Gradle/Eclipse/Single Java file).Or launch VS Code Quick Open ( Ctrl + P), paste the following command, and press enter. Open VS Code and press F1 or Ctrl + Shift + P to open command palette, select Install Extension and type vscode-java-debug. Language Support for Java by Red Hat (version 0.14.0 or later).Breakpoints/Conditional Breakpoints/Logpoints.It allows users to debug Java code using Visual Studio Code (VS Code). A lightweight Java Debugger based on Java Debug Server which extends the Language Support for Java by Red Hat.

Visual studio code java printstacktrace