myexception.java

Java语言是目前最流行

//自己定义异常类，并用 throw 语句来抛出它
public class MyException
{
	static void Method(int a) throws ExceptionDemo
	{
		System.out.println("\t调用方法Method("+a+"0");
		if(a>10|a<0)
			throw new ExceptionDemo(a);
		System.out.println("\t正常退出.");	
	}	
	public static void main(String[] aa)
	{
		try
		{
			Method(1);
			Method(-3);	
		}	
		catch(ExceptionDemo e)
		{
			System.out.println("\t捕获异常："+e.toString());	
		}
	}
}
class ExceptionDemo extends Exception
{
	private int detail;
	ExceptionDemo(int a)
	{ detail = a; }
	public String toString()
	{
		return " exceptionDemo"+detail;	
	}
}