JRunner - VS Code Extension for Running Java Programs
JRunner is a VS Code extension that simplifies the process of compiling and running Java programs directly from the editor. It provides helpful error reporting and interactive feedback, making it easier to troubleshoot issues during the development process. The extension supports running Java files in an external terminal and provides syntax highlighting for compilation errors. This extension also provides shorthand snippets to make it easy to type long lenghty code.
Screenshots
Run in external terminal:
Inline Compilation error highliting:
Easy shotcuts and snippets:
Usage
- Running Code: Shift+f8 or F8 to run
Features
- Run Java Programs: Execute Java programs directly from VS Code using the
Run Java command.
- Compilation Error Highlighting: Automatically highlights errors in the editor with red background and error messages for easy identification.
- Interactive Terminal: Runs Java programs in an external terminal, allowing for full output visibility and interaction.
Requirements
Installation
- Open VS Code.
- Navigate to the Extensions view (Ctrl+Shift+X).
- Search for
JRunner.
- Click on the
Install button.
Usage
Running Java Code
- Open a
.java file in the editor.
- Press
Ctrl+Shift+P to open the command palette.
- Search for and select Run Java.
- The Java program will be compiled, and if successful, it will be executed in an external terminal.
Error Handling
- If there are compilation errors, they will be highlighted in the editor, and a detailed error message will appear in the output channel.
- Errors are parsed and aggregated to handle cases where multiple errors occur on the same line.
Configuration
The extension works automatically by detecting Java files and running them in the appropriate context. However, you can customize the output channel and terminal behavior based on your OS.
- Windows: Opens in
cmd.exe.
- macOS: Opens in the built-in
Terminal app.
- Linux: Opens in the default terminal emulator (e.g.,
gnome-terminal).
Commands
- Run Java: Executes the Java program from the currently open
.java file.
Error Messages
The following error levels are displayed with color-coding for better visibility:
- Error: Red
- Success: Green
- Info: Blue
These messages appear in the output channel and are also displayed in the editor as inline decorations.
Snippets
Basic usages:
| Snippets |
Expansion |
main, psvm |
→ public static void main(String[] args) { ... } |
fori |
→ for (int i = 0; i < n; i++) { ... } |
foreach |
→ for (Type element : collection) { ... } |
try |
→ try { ... } catch (Exception e) { ... } |
fun |
→ public void methodName(parameters) { ... } |
interface |
→ public interface InterfaceName { ... } |
if |
→ if (condition) { ... } |
ifelse |
→ if (condition) { ... } else { ... } |
switch |
→ switch (variable) { case value1: ...; break; default: ... } |
getter |
→ public Type getPropertyName() { return property; } |
setter |
→ public void setPropertyName(Type value) { this.property = value; } |
sout, print, pln, prt |
→ System.out.println(message); |
souf, print, pf |
→ System.out.printf(message); |
scan, inp, sc |
→ Scanner scannerName = new Scanner(System.in); |
scint |
→ int variableName = scannerName.nextInt(); |
scstr |
→ String variableName = scannerName.nextLine(); |
scchar |
→ char variableName = scannerName.nextLine().charAt(0); |
Feedback
If you encounter any issues or have suggestions for improvement, please open an issue in GitHub repository
Enjoy coding with jrunner!😊
