Question

How to remove all items from HashMap in Java

Answer 1

import java.util.HashMap;

public class MyClass {
    public static void main(String[] args) {

        HashMap<Integer, String> hmap = new HashMap<Integer, String>();

        hmap.put(1, "Darth Vader");
        hmap.put(2, "Luke Skywalker");
        hmap.put(3, "Obi-Wan Kenobi");
        hmap.put(4, "Han Solo");
        
        System.out.println(hmap);
        
        hmap.clear();
        
        System.out.println(hmap);
    }
}



/*
run:

{1=Darth Vader, 2=Luke Skywalker, 3=Obi-Wan Kenobi, 4=Han Solo}
{}

*/

 

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