ActivityOne.java

public class ActivityOne extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Person person = new Person("Ekansh","[email protected]","New Delhi, India");
        Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
        intent.putExtra(DataUtil.PERSON, person);
        startActivity(intent);
    }
}

ActivityTwo.java

public class ActivityTwo extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Person person = (Person) getIntent().getSerializableExtra(DataUtil.PERSON);
    }
}

DataUtil.java

public interface DataUtil {
   
    String PERSON = "person";

}

Person.java

class Person implements Serializable {

    private static final long serialVersionUID = 1L;

    private String name;
    private String email;
    private String address;


    public Person(){}
    public Person(String name,String email,String address){
       this.name=name;
       this.email=email;
       this.address=address;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}