How to import node-java and use it correctly? - vscode-extensions

Question

Now I am trying to call our APIs in our own Jar.
In VS Code extension example project, I tried to npm install java to install it in modules dir.
In my extension.ts it looks like below:
import * as vscode from "vscode";
import * as java from "java";
// this method is called when your extension is activated
// your extension is activated the very first time the command is executed
export function activate(context: vscode.ExtensionContext) {
// Use the console to output diagnostic information (console.log) and errors (console.error)
// This line of code will only be executed once when your extension is activated
console.log(
'Congratulations, your extension "test-ext" is now active!'
);
context.subscriptions.push(
vscode.commands.registerCommand("test-ext.callLocalJar", async () => {
console.log('test caller start.');
java.classpath.push("testapis.jar");
console.log('test caller start.');
}
)
);
}
// this method is called when your extension is deactivated
export function deactivate() {}
But now I got a failure in the very beginning when activating it...
error:
Activating extension 'boyka.test-ext' failed:
Cannot find module 'c:\Users\boyka\Workspaces\test-ext\build\Release\nodejavabridge_bindings.node'.
My package.json is like
"dependencies": {
"java": "^0.12.2"
}
I am not sure of the root cause, tried to research and add Java home to PATH but luck.
Anyone has this node-java usage experience that could help? Will appreciate that!
https://github.com/joeferner/node-java
Thanks
b.