JavaµÄContainerʾÀý³ÌÐò

package com.tiantian;
import java.util.*;
public class JAVAContainer {
public static void main(String[] args) throws Exception {
// ArrayList
{
ArrayList arraylist = new ArrayList();
arraylist.add(0, "end");//Ö¸¶¨Ë÷Òý¼ÓÈëÖµ
// Ðè×¢ÒâµÄÊÇ£¬Èç¹ûÏÖÓÐ2¸öÖµ£¬ÎÒÓÈëË÷Ò?µÄÄÇô¾Í»á³öÏÖÒì³£
for (int i = 0; i < 2; i++) {
arraylist.add(i, String.valueOf(i));
}
System.out.println("ArrayList:");
for (int i = 0; i < arraylist.size(); i++) {
System.out.print(arraylist.get(i) + ";");
}
arraylist.add("0");//Ö±½Ó¼ÓÈëÖµµ½ArrayListµÄ×îºó
arraylist.add("0");
System.out.print(" ArrayList's lastIndexOf("0") is "
+ arraylist.lastIndexOf("0"));
}
// Arrays
{
String[] array = new String[] { "a", "b", "c" };
List list = Arrays.asList(array);
System.out.println(" Arrays:");
for (int i = 0; i < list.size(); i++) {
System.out.print(list.get(i) + ";");
}
System.out.print(" Arrays's length is " + array.length);//´òÓ¡Êý×éµÄ³¤¶È
}
// Collections
{
String[] array = new String[] { "a", "b", "c" };
List list = Arrays.asList(array);
Collections.fill(list, "Fill");//ÓÃFillÌî³äÈ«²¿ÔªËØ
System.out.println(" Collections:");
for (int i = 0; i < list.size(); i++) {
System.out.print(list.get(i) + ";");
}
array = new String[] { "1", "2", "3" };
List list2 = Arrays.asList(array);
Collections.copy(list, list2);//¿½±´list2µÄÊý¾Ý½ølist
System.out.println(" " + list);
Collections.swap(list, 2, 1);//µ÷»»Ë÷ÒýΪ1ºÍ2µÄÔªËصÄλÖÃ
System.out.println(list);
}
// EventObject
{
String s = "hello";
String s2 = s;
EventObject eventobject = new EventObject(s);//Ò»¸ö×¼ÈÝÆ÷ÀàÐÍ£¬È·ÇеĹéÀàËü²»ÊÇÈÝÆ÷
System.out.println("EventObject:");
System.out.println(eventobject.getSource());
System.out.println(eventobject.equals(s2));
}
// HashMap
{
HashMap hashmap = new HashMap();//Ò»¸öËÙ¶È×î¿ìµÄÈÝÆ÷
hashmap.put("0", "c");
hashmap.put("1", "a");
hashmap.put("2", "b");
hashmap.put("3", "a");
System.out.println("HashMap:");
System.out.println(hashmap);//¸ÃÈÝÆ÷ÓÐ