autoboxingunboxing.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 AutoBoxingUnboxing
{
	public static void main(String[] args) 
	{
		//直接把一个基本类型变量赋给Integer对象
		Integer inObj = 5;
		//直接把一个boolean类型变量赋给一个Object类型的变量
		Object boolObj = true;
		//直接把一个Integer对象赋给int类型的变量
		int it = inObj;
		if (boolObj instanceof Boolean)
		{
			//先把Object对象强制类型转换为Boolean类型，再赋给boolean变量
			boolean b = (Boolean)boolObj;
			System.out.println(b);
		}
	}
}