Question

How to set view of the keys contained in HashMap in Java

Answer 1

package javaapplication1;

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

public class JavaApplication1 {

    public static void main(String[] args) {

        HashMap hMap = new HashMap();
   
        hMap.put("1", "Java");
        hMap.put("2", "C++");
        hMap.put("3", "C");
        hMap.put("4", "C#");
        hMap.put("5", "PHP");

        Set st = hMap.keySet();
   
        Iterator itr = st.iterator();
        
        while(itr.hasNext())
            System.out.println(itr.next());
  }
}
  
/*
run:

1
2
3
4
5

*/

 

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