Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String args[]) {
        MyObject c1 = new MyObject(1, "one");
        MyObject c2 = new MyObject(2, "two");
        MyObject c3 = new MyObject(3, "three");

        MyObject c4 = new MyObject(1, "one");
        MyObject c5 = new MyObject(2, "two");
        MyObject c6 = new MyObject(3, "three");

        Map<Integer, MyObject> map = new HashMap<Integer, MyObject>();
        map.put(c1.getId(), c1);
        map.put(c2.getId(), c2);
        map.put(c3.getId(), c3);
        map.put(c4.getId(), c4);
        map.put(c5.getId(), c5);
        map.put(c6.getId(), c6);

        System.out.println(map);
    }

}

class MyObject {
    public MyObject(int id, String name) {
        this.id = id;
        this.name = name;
        this.creationTme = new Date();
    }

    private Integer id;
    private String name;
    private Date creationTme;

    public int getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public Date getCreationTme() {
        return creationTme;
    }

    public void setCreationTme(Date creationTme) {
        this.creationTme = creationTme;
    }

    @Override
    public int hashCode() {
        return this.id;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof MyObject && ((MyObject) obj).id == this.id)
            return true;
        else
            return false;
    }

    public String toString() {
        final String TAB = "    ";

        String retValue = "";

        retValue = "Check(" + "id = " + this.id + TAB + "name = " + this.name + TAB + "creationTme = "
                + this.creationTme.getTime() + TAB + " )";

        return retValue;
    }
}