public class ThrowDemo {
	public static void main(String[] args)
	{
		try
		{
			int ret=divide(10,0);
			System.out.println(ret);
		}catch(ArithmeticException e)
		{
			System.out.println(e.getMessage());
		}
	}
	private static int divide(int num1,int num2)
	{
		System.out.println("begin");
		if(num2==0) 
		{
			throw new ArithmeticException("除數不能為0");
		}
		System.out.println("-------");
		try
		{
			int ret=num1/num2;
			System.out.println("結果"+ ret);
			return ret;
		}catch(ArithmeticException e)
		{
			e.printStackTrace();
		}
		System.out.println("end");
		return 0;
	}
}
 

throw和return類似，只是return返回一個值而throw返回一個錯誤 格式為throw new 錯誤型別（“異常資訊”）