Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Iterator;
import java.util.TreeMap;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        TreeMap<String, String> treeMap = new TreeMap<String, String>();
        treeMap.put("1", "One");
        treeMap.put("3", "Three");
        treeMap.put("2", "Two");

        Set st = treeMap.keySet();
        Iterator itr = st.iterator();
        while (itr.hasNext()) {
            System.out.println(itr.next());
        }
        st.remove("1");

        System.out.println(treeMap.containsKey("1"));
    }
}