异常处理

异常处理的try catch

package Throwable;

public class TryCatchTest {

	public static void main(String[] args) 
	{
		int num1=30,num2=0;
		int result;
		
		//确定捕获异常的范围
		try{
			//该语句会产生除数为0的异常
			result=num1/num2;
			//System.out.println(result);
		}
       //  处理异常
		catch(Exception e)
		{
			//输出与异常有关的错误信息
			System.out.println(e.getMessage());
		}
		finally
		{
			System.out.println("这是最后TryCatchTest一个语句!");
		}
	}

}

2

package Throwable;
//public class MyException extends Exception
//{
//	public String getMessage()
//	{
//		return("字符串长度已经超出范围！");
//	}
//}
public class MyExceptionTest 
{

	public static void main(String[] args) 
	{
		String str="this is my ExceptionClass Test!";
		try
		{
			if(str.length()>5)
				throw new Exception();
		}
		catch(Exception e)
		{
			System.out.println(e.getMessage());
		}

	}

}