MainActivity.java

package github.nisrulz.builderpattern;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);


        final User user = new User.UserBuilder("Nishant", "Srivastava")
                .age(24)
                .phone("0000909211")
                .address("my address")
                .build();

        final String text = user.getFirstname() + " " + user.getLastname();

        final FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, text, Snackbar.LENGTH_LONG).show();
            }
        });
    }
}