collectionsdemo.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 40 行

package chapter9;

import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedList;

public class CollectionsDemo {

	public static void main(String[] args) {
		// a linkedlist
		LinkedList ll = new LinkedList();
		ll.add(new Integer(-8));
		ll.add(new Integer(20));
		ll.add(new Integer(-20));
		ll.add(new Integer(8));
		// a Comparator
		Comparator r = Collections.reverseOrder();
		// sort method
		Collections.sort(ll, r);

		Iterator li = ll.iterator();
		System.out.print("List sorted in reverse: ");
		while (li.hasNext())
			System.out.print(li.next() + " ");
		// random order
		Collections.shuffle(ll);
		li = ll.iterator();
		System.out.print("List shuffled: ");
		while (li.hasNext())
			System.out.print(li.next() + " ");
		System.out.println();
		// min method & max method
		System.out.println("Minimum: " + Collections.min(ll));
		System.out.println("Maximum: " + Collections.max(ll));

	}

}