How to change title of Activity in Android?

Question

I am using

Window w = getWindow();
w.setTitle(\"My title\");

to change title of my current Activity but it does not seem to work.

Answer 1

setTitle(getResources().getText(R.string.MyTitle));

Answer 2

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.Main_Activity);
    this.setTitle("Title name");
}