//UserException.java
import java.io.*;
public class UserException
{
	//拋出異常的方法
	void doSomeThing()
	{
		int a = 0;
		int b = 10;
		//產(chǎn)生異常的條件判斷
		if(a!=0)
		{
			System.out.println("Normal");
		}
		else
		{
			//拋出異常
			throw new UserDefineException();
		}
	}
	public static void main(String args[])
	{
		UserException one = new UserException();
		//調(diào)用類實例的方法
		one.doSomeThing();
	}
}
//用戶定義的異常，由Exception類派生
class UserDefineException extends ArithmeticException
{
	public UserDefineException(){
		System.out.println("Exception occured");
	}
}