Compile Java File: IdentityHashMapContainsValueExample2

import java.util.IdentityHashMap;

class Student{
    private int roll;
    private String name;
    private int standard;
    
    public Student(int roll,String name,int standard){
        this.roll = roll;
        this.name = name;
        this.standard = standard;
    }
    
    public String disp(){
        return roll+" "+name+" "+standard;
    }
}

public class IdentityHashMapContainsValueExample2 {
    public static void main(String[] args) {
        
        //Creating Objects of Student class
        Student stud1 = new Student(1 ,"Ram ",10);
        Student stud2 = new Student(2 ,"Shyam ",10);
        Student stud3 = new Student(3 ,"Aman ",12);
        Student stud4 = new Student(4 ,"Harsh ",12);
        Student stud5 = new Student(5 ,"Shivam",11);
        
        //Creating an instance of IdentityHashMap
        IdentityHashMap<Integer,Student> map = new IdentityHashMap<Integer,Student>(5);
        
        //Inserting the Student class objects into IdentityHashMap
        System.out.println(map.put(1,stud1));
        System.out.println(map.put(2,stud2));
        System.out.println(map.put(3,stud3));
        System.out.println(map.put(4,stud4));
        
        //Using containsValue() method
        System.out.println(map.containsValue(stud1));
        System.out.println(map.containsValue("Random"));
        System.out.println(map.containsValue(stud4));
        System.out.println(map.containsValue(stud5));
}
}

Output

Online Java Compiler By JavaTpoint.com