References to launch.json in error messaging may be misleading #431

https://github.com/microsoft/java-debug/search?q=launch.json

There appear to be only two references to launch.json in this repository. There does not appear to be any part of the code actually reading or referencing or introspecting a file named launch.json.

End users may find references to launch.json confusing if a third party tool has launched the debugger to connect to a java process and did not pass in a "projectName" to the call. While I realize this is a bit outside the scope of this repository, an example would be a vscode extension using the vscode.debug API (which flows to the https://github.com/microsoft/vscode-java-debug extension) and not setting a project name. In this case there is no launch.json file.

private async startDebugger(port: string) {
        this.port = port;
        vscode.debug.startDebugging(undefined, {
            type: 'java',
            request: 'attach',
            name: 'Debug (Remote)',
            hostName: 'localhost',
            port,
           projectName // set to undefined as an example
        });
    }

Since this repository itself does not read a launch.json at all, and all configuration is passed in via a Debug Adapter, not an existing file, these references to a file name are very misleading.