how to remove the status bar in android studio code example

Example 1: how to remove status bar in android

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
}

Example 2: how hide status bar in android studio

getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);