diff --git a/README.md b/README.md
index dfed576..a7428b5 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ A lightweight Java Debugger based on [Java Debug Server](https://github.com/Micr
 ## Requirements
 - JDK (version 1.8.0 or later)
 - VS Code (version 1.17.0 or later)
-- [Language Support for Java by Red Hat](https://marketplace.visualstudio.com/items?itemName=redhat.java) (version 0.12.0 or later)
+- [Language Support for Java by Red Hat](https://marketplace.visualstudio.com/items?itemName=redhat.java) (version 0.13.0 or later)
 
 ## Install
 
diff --git a/src/commands.ts b/src/commands.ts
index ee7c0d7..44f6aff 100644
--- a/src/commands.ts
+++ b/src/commands.ts
@@ -13,7 +13,7 @@ export const JAVA_RESOLVE_CLASSPATH = "vscode.java.resolveClasspath";
 
 export const JAVA_RESOLVE_MAINCLASS = "vscode.java.resolveMainClass";
 
-export const JAVA_BUILD_WORKSPACE = "vscode.java.buildWorkspace";
+export const JAVA_BUILD_WORKSPACE = "java.workspace.compile";
 
 export const JAVA_EXECUTE_WORKSPACE_COMMAND = "java.execute.workspaceCommand";
 
diff --git a/src/configurationProvider.ts b/src/configurationProvider.ts
index a8af641..b31c93f 100644
--- a/src/configurationProvider.ts
+++ b/src/configurationProvider.ts
@@ -79,10 +79,23 @@ export class JavaDebugConfigurationProvider implements vscode.DebugConfiguration
                 // log a warning message and continue, since logger failure should not block debug session
                 console.log("Cannot set log level to java debuggeer.")
             }
-            if (Object.keys(config).length === 0) { // No launch.json in current workspace.
-                // VSCode will create a launch.json automatically if no launch.json yet.
+
+            // trigger build workspace
+            try {
+                const buildResult = await vscode.commands.executeCommand(commands.JAVA_BUILD_WORKSPACE);
+                console.log(buildResult);
+            } catch (err) {
+                vscode.window.showErrorMessage("Build failed, please fix build error first.");
                 return config;
-            } else if (config.request === "launch") {
+            }
+
+            if (Object.keys(config).length === 0) { // No launch.json in current workspace.
+                // Generate config in memory for files without project.
+                config.type = "java";
+                config.name = "Java Debug";
+                config.request = "launch";
+            }
+            if (config.request === "launch") {
                 if (!config.mainClass) {
                     const res = <any[]>(await resolveMainClass());
                     if (res.length === 0) {