Android toolbar menu

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Jun 19, 2017 9:12:29 PM via Website

Hi,

I am trying to understand the code for the Android Toolbar Menu.
What does this code do?

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                .setAction("Action", null).show();
    }
});