Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Comparator;
import java.util.SortedMap;
import java.util.TreeMap;

public class Main {
    public static void main(String[] args) {
        Comparator<String> keyComparator = Comparator.comparing(String::length)
                .thenComparing(String::compareToIgnoreCase);

        SortedMap<String, String> sMap = new TreeMap<>(keyComparator);
        sMap.put("CSS", "style");
        sMap.put("HTML", "mark up");
        sMap.put("Oracle", "database");
        sMap.put("XML", "data");

        SortedMap<String, String> subMap = sMap.subMap("CSS", "XML");
        System.out.println(subMap);

        // Get the first and last keys
        String firstKey = sMap.firstKey();
        String lastKey = sMap.lastKey();
        System.out.println("First Key:  " + firstKey);
        System.out.println("Last key:   " + lastKey);
    }

}