Collections Utilities Demo

package com.bruceeckel;
 
//: c11:Utilities.java
//Simple demonstrations of the Collections utilities.
//From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
//www.BruceEckel.com. See copyright notice in CopyRight.txt.
 
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.List;
import java.util.Vector;
 
public class Utilities {
 
    public static void main(String[] args) {
	List list = Arrays.asList("one Two three Four five six one".split(" "));
	System.out.println(list);
	System.out.println("max: " + Collections.max(list));
	System.out.println("min: " + Collections.min(list));
	AlphabeticComparator comp = new AlphabeticComparator();
	System.out.println("max w/ comparator: " + Collections.max(list, comp));
	System.out.println("min w/ comparator: " + Collections.min(list, comp));
	List sublist = Arrays.asList("Four five six".split(" "));
	System.out.println("indexOfSubList: " + Collections.indexOfSubList(list, sublist));
	System.out.println("lastIndexOfSubList: " + Collections.lastIndexOfSubList(list, sublist));
	Collections.replaceAll(list, "one", "Yo");
	System.out.println("replaceAll: " + list);
	Collections.reverse(list);
	System.out.println("reverse: " + list);
	Collections.rotate(list, 3);
	System.out.println("rotate: " + list);
	List source = Arrays.asList("in the matrix".split(" "));
	Collections.copy(list, source);
	System.out.println("copy: " + list);
	Collections.swap(list, 0, list.size() - 1);
	System.out.println("swap: " + list);
	Collections.fill(list, "pop");
	System.out.println("fill: " + list);
	List dups = Collections.nCopies(3, "snap");
	System.out.println("dups: " + dups);
	// Getting an old-style Enumeration:
	Enumeration e = Collections.enumeration(dups);
	Vector v = new Vector();
	while (e.hasMoreElements())
	    v.addElement(e.nextElement());
	// Converting an old-style Vector
	// to a List via an Enumeration:
	ArrayList arrayList = Collections.list(v.elements());
	System.out.println("arrayList: " + arrayList);
 
    }
} // /:~

package com.bruceeckel;
 
//www.BruceEckel.com. See copyright notice in CopyRight.txt.
//modified by Code Panda; This class is used several times in those examples, so, move it into a public class.
import java.util.Comparator;
 
public class AlphabeticComparator implements Comparator {
    public int compare(Object o1, Object o2) {
	String s1 = (String) o1;
	String s2 = (String) o2;
	return s1.toLowerCase().compareTo(s2.toLowerCase());
    }
}