testfinallocalvariable.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 TestFinalLocalVariable
{
	public void test(final int a)
	{
		//不能对final修饰的形参赋值，下面语句非法
		//a = 5;
	}
	public static void main(String[] args) 
	{
		//定义final局部变量时指定默认值，则str变量无法重新赋值
		final String str = "hello";
		//下面赋值语句非法
		//str = "Java";
		//定义final局部变量时没有指定默认值，则d变量可被赋值一次
		final double d;
		//第一次赋初始值，成功
		d = 5.6;
		//对final变量重复赋值，下面语句非法
		//d = 3.4;
	}
}