Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static void main(String[] args) {
        HashMap<String, String> hMap = new HashMap<String, String>();

        hMap.put("1", "One");
        hMap.put("2", "Two");
        hMap.put("3", "Three");

        Set st = hMap.keySet();
        Iterator itr = st.iterator();

        while (itr.hasNext())
            System.out.println(itr.next());

        // remove 2 from Set
        st.remove("2");

        System.out.println(hMap.containsKey("2"));
    }
}