public class ComparableEx {
    public static void main(String[] args) {
        Integer i5 = new Integer(50);
        Integer i3 = new Integer(30);
        Integer j5 = new Integer(50);
        System.out.println("i5:" + i5 + "  i3:" + i3 + "  j5:" + j5);
        System.out.println("i3.compareTo(i5) " + i3.compareTo(i5));
        System.out.println("i5.compareTo(i3) " + i5.compareTo(i3));
        System.out.println("i5.compareTo(j5) " + i5.compareTo(j5));
        System.out.println("i5.equals(j5) " + i5.equals(j5));
        System.out.println("(i5 == j5) " + (i5 == j5));

        String abc = "abc";
        String def = "def";
        String abc1 = new String("abc");
        System.out.println("abc:" + abc + "  def:" + def + "  abd0:" + abc1);
        System.out.println("abc.compareTo(def) " + abc.compareTo(def));
        System.out.println("def.compareTo(abc) " + def.compareTo(abc));
        System.out.println("abc.compareTo(abcO) " + abc.compareTo(abc1));
        System.out.println("abc.equals(abcO) " + abc.equals(abc1));
        System.out.println("abc == abcO " + (abc == abc1));
    }

}