HashMap in java

Java HashMap Example import java.util.*; public class HashMapExample1{ public static void main(String args[]){ HashMap map=new HashMap();//Creating HashMap. map.put(1,"Mango"); //Put elements in Map. map.put(2,"Apple"); map.put(3,"Banana"); map.put(4,"Grapes"); 2.Idli, Dosai,Pongal with prices package framework; import java.util.HashMap; public class map { public static void main(String[] args) { // TODO Auto-generated method stub HashMap hm = new HashMap(); hm.put("Idli",20);//entry hm.put("Dosai", 30);//entry hm.put("Pongal", 50);//entry //key--->set //Values-->Collection System.out.println(hm); } } output {Dosai=30, Idli=20, Pongal=50} Idli,Dosai,Pongal without prices package framework; import java.util.HashMap; import java.util.Set; public class map { public static void main(String[] args) { // TODO Auto-generated method stub HashMap hm = new HashMap(); hm.put("Idli",20);//entry hm.put("Dosai", 30);//entry hm.put("pongal", 50);//entry //key--->set //Values-->Collection // System.out.println(hm); Set s = hm.keySet(); System.out.println(s); } } output [Dosai, Idli, Pongal]

Mar 31, 2025 - 16:04

Java HashMap Example
import java.util.*;
public class HashMapExample1{
public static void main(String args[]){
HashMap map=new HashMap();//Creating HashMap.
map.put(1,"Mango"); //Put elements in Map.
map.put(2,"Apple");
map.put(3,"Banana");
map.put(4,"Grapes");

2.Idli, Dosai,Pongal with prices

package framework;

import java.util.HashMap; 

public class map {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        HashMap hm = new HashMap();
        hm.put("Idli",20);//entry
        hm.put("Dosai", 30);//entry
        hm.put("Pongal", 50);//entry
        //key--->set
        //Values-->Collection
        System.out.println(hm);
    }

}

output

{Dosai=30, Idli=20, Pongal=50}

Idli,Dosai,Pongal without prices

package framework;

import java.util.HashMap;
import java.util.Set; 

public class map {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        HashMap hm = new HashMap();
        hm.put("Idli",20);//entry
        hm.put("Dosai", 30);//entry
        hm.put("pongal", 50);//entry
        //key--->set
        //Values-->Collection
//      System.out.println(hm);
        Set s = hm.keySet(); 
        System.out.println(s);
    }

}

output

[Dosai, Idli, Pongal]