option menu in android

package com.example.saigopinarimeti.helloworld;

import android.app.ProgressDialog;
import android.os.Build;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.home_menu,menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.home){
            Toast.makeText(this, "Home", Toast.LENGTH_SHORT).show();
        }

        if (item.getItemId() == R.id.logout){
            Toast.makeText(this, "logout", Toast.LENGTH_SHORT).show();
        }

        if (item.getItemId() == R.id.Contactus){
            Toast.makeText(this, "Contactus", Toast.LENGTH_SHORT).show();
        }
        return super.onOptionsItemSelected(item);
    }
}