静态工厂模式(内存优化)减少创建对象次数

package c;


/**
 * @author : majun
 * @date :2014年8月26日下午5:08:21
 * @version:v1.0+
 * @FileName:Factory.java
 * @ProjectName:javatest
 * @PackageName:c
 * @EnclosingType:
 * @Description:静态工厂模式 --
 */
public class Factory {

	public static void main(String[] args) {
		for (int i = 0; i < 10; i++) {
			Factory f = Factory.obtain();
			f.setX(i);
			System.out.println(f.getX());
		}
	}
	private Factory() {
	}

	private static final int MAX_POOL_SIZE = 50;
	private static int sPoolSize = 0;
	private static Object myLock = new Object();
	private Factory next;
	private static Factory mPool;

	private int x =100;
	public int getX() {
		return x;
	}
	public void setX(int x) {
		this.x = x;
	}
	public static Factory obtain() {
		synchronized (myLock) {
			if (mPool != null) {
				Factory factory = mPool;
				mPool = factory.next;
				factory.next = null;
				sPoolSize--;
				return factory;
			}
		}
		return new Factory(); // next = null 
	}

	/**
	 * 
	 *@data :2014年8月26日下午5:31:10
	 *@description :回收
	 */
	public void recycle() {
		synchronized (myLock) {
			if (sPoolSize < MAX_POOL_SIZE) { // 0 < 50 
				next = mPool; 
				this.x = 1020;
				mPool = this; 
				sPoolSize++;
			}
		}
	}
	
}

减少对象创建 内存优化------------------------------------------------------------------>

减少对象创建 内存优化------------------------------------------------------------------>