Java - Use forEach to display Object in a Set

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Description

Use forEach to display Object in a Set

Demo

import java.util.HashSet;
import java.util.Random;
import java.util.Set;

class SetMain {//w ww.  ja v a 2  s. com
  public static void main(String[] args) {
    Set<Emp> set = new HashSet<>();
    set.add(new Emp("aman", 21));
    set.add(new Emp("aman", 21));
    set.add(new Emp("aman", 21));
    set.add(new Emp("aman", 21));
    set.stream().forEach(System.out::println);
  }

}

class Emp {
  String name;
  int age;

  public Emp(String name, int age) {
    this.name = name;
    this.age = age;
  }

  @Override
  public int hashCode() {
    // Wrong Implementation of hasCode
    int hashcode = new Random().nextInt(10);
    System.out.println(hashcode);
    return hashcode;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    Emp other = (Emp) obj;
    if (age != other.age)
      return false;
    if (name == null) {
      if (other.name != null)
        return false;
    } else if (!name.equals(other.name))
      return false;
    return true;
  }

  @Override
  public String toString() {
    return "Emp [name=" + name + ", age=" + age + "]";
  }

}

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