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Add Java debugger support #12076

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Add Java debugger support #12076

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e55e8be
Start Java debug extension support
marshalhayes Oct 16, 2025
09a787e
Fallback to project_path if main_class_path is not provided
marshalhayes Oct 17, 2025
13c00b5
Add basic tests for Java debugger extension
marshalhayes Oct 17, 2025
68668ab
Add Java to README.md, and include links to debugger extension docs
marshalhayes Oct 17, 2025
8a9369f
Merge branch 'dotnet:main' into vscode-extension/java
marshalhayes Oct 17, 2025
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9 changes: 9 additions & 0 deletions extension/src/capabilities.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,10 @@ export function isPythonInstalled() {
return isExtensionInstalled("ms-python.python");
}

export function isJavaInstalled() {
return isExtensionInstalled("vscjava.vscode-java-pack");
}
Comment on lines +22 to +24
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Copilot AI Oct 17, 2025

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Detecting capability via the extension pack ID may miss users who installed only the Debugger for Java extension. Consider checking for either the debugger extension or the pack: return isExtensionInstalled('vscjava.vscode-java-debug') || isExtensionInstalled('vscjava.vscode-java-pack');

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export function getSupportedCapabilities(): string[] {
const capabilities = ['prompting', 'baseline.v1', 'secret-prompts.v1'];

Expand All @@ -37,6 +41,11 @@ export function getSupportedCapabilities(): string[] {
capabilities.push("ms-python.python");
}

if (isJavaInstalled()) {
capabilities.push("java");
capabilities.push("vscjava.vscode-java-pack");
}
Comment on lines +44 to +47
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Copilot AI Oct 17, 2025

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If you adjust detection to include the Debugger for Java extension, reflect that here by pushing the actual installed extension ID (prefer the debugger extension if present). This keeps capabilities aligned with what's installed.

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return capabilities;
}

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10 changes: 10 additions & 0 deletions extension/src/dcp/types.ts
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Expand Up @@ -38,6 +38,16 @@ export function isPythonLaunchConfiguration(obj: any): obj is PythonLaunchConfig
return obj && obj.type === 'python';
}

export interface JavaLaunchConfiguration extends ExecutableLaunchConfiguration {
type: "java";
main_class_path?: string;
project_path?: string;
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write a comment to explain why both are included

}

export function isJavaLaunchConfiguration(obj: any): obj is JavaLaunchConfiguration {
return obj && obj.type === 'java';
}

export interface EnvVar {
name: string;
value: string;
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7 changes: 6 additions & 1 deletion extension/src/debugger/debuggerExtensions.ts
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Expand Up @@ -4,8 +4,9 @@ import { debugProject } from "../loc/strings";
import { mergeEnvs } from "../utils/environment";
import { extensionLogOutputChannel } from "../utils/logging";
import { projectDebuggerExtension } from "./languages/dotnet";
import { isCsharpInstalled, isPythonInstalled } from "../capabilities";
import { isCsharpInstalled, isJavaInstalled, isPythonInstalled } from "../capabilities";
import { pythonDebuggerExtension } from "./languages/python";
import { javaDebuggerExtension } from "./languages/java";

// Represents a resource-specific debugger extension for when the default session configuration is not sufficient to launch the resource.
export interface ResourceDebuggerExtension {
Expand Down Expand Up @@ -70,6 +71,10 @@ export function getResourceDebuggerExtensions(): ResourceDebuggerExtension[] {
extensions.push(pythonDebuggerExtension);
}

if (isJavaInstalled()) {
extensions.push(javaDebuggerExtension);
}

return extensions;
}

17 changes: 17 additions & 0 deletions extension/src/debugger/languages/java.ts
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@@ -0,0 +1,17 @@
import { isJavaLaunchConfiguration } from "../../dcp/types";
import { invalidLaunchConfiguration } from "../../loc/strings";
import { ResourceDebuggerExtension } from "../debuggerExtensions";

export const javaDebuggerExtension: ResourceDebuggerExtension = {
resourceType: 'java',
debugAdapter: 'java',
extensionId: 'vscjava.vscode-java-pack',
displayName: 'Java',
getProjectFile: (launchConfig) => {
if (isJavaLaunchConfiguration(launchConfig) && launchConfig.project_path) {
return launchConfig.project_path;
}

throw new Error(invalidLaunchConfiguration(JSON.stringify(launchConfig)));
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The error includes the full serialized launch configuration, which may leak sensitive values (e.g., env vars) into logs. Prefer a concise, non-sensitive message (e.g., include only the type and which required fields are missing) instead of JSON-stringifying the entire object.

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}
};
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