Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;

public class Main {

    public static void main(String args[]) {
        Set<String> hs = new HashSet<String>();

        hs.add("one");
        hs.add("two");
        hs.add("three");

        System.out.println("Here is the HashSet: " + hs);

        if (!hs.add("three"))
            System.out.println("Attempt to add duplicate. " + "Set is unchanged: " + hs);

        TreeSet<Integer> ts = new TreeSet<Integer>();

        ts.add(8);
        ts.add(19);
        ts.add(-2);
        ts.add(3);

        System.out.println(ts);

        System.out.println("First element in ts: " + ts.first());
        System.out.println("Last element in ts: " + ts.last());

        System.out.println("First element > 15: " + ts.higher(15));
        System.out.println("First element < 15: " + ts.lower(15));
    }
}