ex_3_6_7.java

java思想编程与设计模块

/*
 *文件名:ex_3_6_7.java
 *说  明:用户自定义异常举例
 */
//用户异常类
class MyException extends Exception 
{
	private int detail;
	MyException(int a) 
	{
		super();
		detail = a;
	}
	//重载toString方法
	public String toString() 
	{
		return "MyException[" + detail + "]";
	}
}

class ExceptionDemo 
{
	static void compute(int a) throws MyException 
	{
		System.out.println("Called compute(" + a + ")");
		if(a > 10)
			throw new MyException(a);
		System.out.println("Normal exit");
	}
	public static void main(String args[]) 
	{
		try {
			compute(2);
			compute(300);
		} catch (MyException e) {
			System.out.println("Caught " + e);
		}
	}
}