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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.ArrayList;
  7. import java.util.HashSet;
  8. import java.util.List;
  9. import java.util.Set;
  10.  
  11. /* Name of the class has to be "Main" only if the class is public. */
  12. class Ideone
  13. {
  14. 	public static void main(String[] args) {
  15.         List<Employee> list = new ArrayList<>();
  16.         list.add(new Employee(123, "zMadhu", "1000$", 1));
  17.         list.add(new Employee(332, "bSudhan", "2000$", 2));
  18.         list.add(new Employee(54, "cKongarass", "3000$", 3));
  19.         list.add(new Employee(54, "xKongarass", "3000$", 4));
  20.         list.add(new Employee(54, "aKongarass", "3000$", 5));
  21.  
  22.         Set<Employee> em = new HashSet<>(list);
  23.         System.out.println(em);
  24.  
  25.     }
  26. }
  27.  
  28. class Employee {
  29.  
  30.     private int id;
  31.     private String name;
  32.     private String salary;
  33.     private String recordStatus;
  34.     private int key;
  35.  
  36.     public Employee(int id, String name, String salary, int key) {
  37.         super();
  38.         this.id = id;
  39.         this.name = name;
  40.         this.salary = salary;
  41.         this.key = key;
  42.     }
  43.  
  44.     @Override
  45.     public boolean equals(Object o) {
  46.         if (this == o) return true;
  47.         if (!(o instanceof Employee)) return false;
  48.  
  49.         Employee employee = (Employee) o;
  50.  
  51.         return id == employee.id;
  52.     }
  53.  
  54.     @Override
  55.     public int hashCode() {
  56.         return id;
  57.     }
  58.  
  59.     @Override
  60.     public String toString() {
  61.         return id + "";
  62.     }
  63. }
Success #stdin #stdout 0.05s 2184192KB
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Standard input is empty
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[54, 123, 332]
https://ideone.com/ahGdnX
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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