仿照Android的池化技术

/** * 仿照Android池化技术 * @author fgtian * */public class ObjectCacheTest {public static class ObjectItem {private static int sPoolSize = 0;private static final int MAX_CACHE = 10;private static final Object sPoolLock = new Object();private static ObjectItem sPool = null;private ObjectItem mNext = null;private int mValue;public static ObjectItem obtain() {synchronized (sPoolLock) {if (null != sPool) {ObjectItem item = sPool;sPool = item.mNext;item.mNext = null;--sPoolSize;return item;}}return new ObjectItem();}public static ObjectItem obtain(int value) {synchronized (sPoolLock) {if (null != sPool) {ObjectItem item = sPool;sPool = item.mNext;item.mNext = null;--sPoolSize;item.mValue = value;return item;}}return new ObjectItem(value);}public void recycle() {synchronized (sPoolLock) {if (sPoolSize < MAX_CACHE) {mValue = 0;this.mNext = sPool;sPool = this;sPoolSize++;}}}public ObjectItem() {}public ObjectItem(int value) {mValue = value;}@Overridepublic String toString() {return String.valueOf(mValue);}}public static final void main(String[] args) {ObjectItem item1 = ObjectItem.obtain(1);item1.recycle();ObjectItem item2 = ObjectItem.obtain(3);if (item1 == item2) {System.out.println("YES, USE THE SAME OBJECT");} else {System.out.println("ERROR");}}}
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