Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.TreeMap;

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

        TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();

        // populating tree map
        treemap.put(2, "two");
        treemap.put(1, "one");
        treemap.put(3, "three");
        treemap.put(6, "six");
        treemap.put(5, "from java2s.com");

        System.out.println("Checking first key");
        System.out.println("First key is: " + treemap.firstKey());
    }
}