//Written by K@stackoverflowpublic class Main { public static void main(String[] args) { // TODO pre application logic here ArrayList<Person> people = new ArrayList<Person>(); people.add(new Person("Subash Adhikari", 28)); people.add(new Person("K", 28)); people.add(new Person("StackOverflow", 4)); people.add(new Person("Subash Adhikari", 28)); for (int i = 0; i < people.size() - 1; i++) { for (int y = i + 1; y <= people.size() - 1; y++) { boolean check = people.get(i).equals(people.get(y)); System.out.println("-- " + people.get(i).getName() + " - VS - " + people.get(y).getName()); System.out.println(check); } } }}//written by K@stackoverflowpublic class Person { private String name; private int age; public Person(String name, int age){ this.name = name; this.age = age; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (!Person.class.isAssignableFrom(obj.getClass())) { return false; } final Person other = (Person) obj; if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) { return false; } if (this.age != other.age) { return false; } return true; } @Override public int hashCode() { int hash = 3; hash = 53 * hash + (this.name != null ? this.name.hashCode() : 0); hash = 53 * hash + this.age; return hash; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; }}Output:
`run:
– Subash Adhikari - VS - K false
– Subash Adhikari - VS - StackOverflow false
– Subash Adhikari - VS - Subash Adhikari true
– K - VS - StackOverflow false
– K - VS - Subash Adhikari false
– StackOverflow - VS - Subash Adhikari false
– BUILD SUCCESSFUL (total time: 0 seconds)`
