ex_3_6_5.java

java思想编程与设计模块

/*
 *文件名:ex_3_6_5.java
 *说  明:演示嵌套try语句的使用
 */
class NestTry
{
	public static void main(String args[]) 
	{
		try 
		{
			int a = args.length;
			//如果没有命令行参数，
			//则抛出divide-by-zero异常
			int b = 42 / a;
			System.out.println("a = " + a);
			try 
			{ 
				//嵌套try块			
				if (a==1) a = a/(a-a); // division by zero
				//如果有两个命令行参数
				//则抛出out-of-bounds异常
				if(a==2) 
				{
					int c[] = { 1 };
					c[42] = 99; 
				}
			} catch(ArrayIndexOutOfBoundsException e) 
			{
					System.out.println("Array index out-of-bounds: " + e);
			}
		} catch(ArithmeticException e) 
		{
			System.out.println("Divide by 0: " + e);
		}
	}
}