testintegercache.java

疯狂Java讲义_源码(含Java设计模式CHM

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class TestIntegerCache
{
	public static void main(String[] args) 
	{
		//生成新的Integer对象
		Integer in1 = new Integer(6);
		//生成新的Integer对象，并缓存该对象
		Integer in2 = Integer.valueOf(6);
		//直接从缓存中取出Ineger对象
		Integer in3 = Integer.valueOf(6);
		//输出false
		System.out.println(in1 == in2);
		//输出true
		System.out.println(in2 == in3);
	}
}