Java异常处理Exception

常见：


算术异常类：ArithmeticExecption


空指针异常类：NullPointerException


类型强制转换异常：ClassCastException


数组负下标异常：NegativeArrayException


数组下标越界异常：ArrayIndexOutOfBoundsException


文件未找到异常：FileNotFoundException

方法未找到异常：NoSuchMethodException

自定义异常处理：

 

Exception1.java

public class Exception1 extends Exception{

	private int num;

	public Exception1(int a)

	{

		this.num=a;

	}

	public String toString(){

		return num+"的值必须大于10！";

	}

}

 

 

Exception2.java

public class Exception2 extends Exception{

	private int num;

	public Exception2(int a)

	{

		this.num=a;

	}

	public String toString(){

		return num+"的值必须小于100！";

	}

}

 

Test.java

public class Test

{

	public void makeException(int x) throws Exception1,Exception2

	{

		if(x<10)

		{

		throw new Exception1(x);

		}

		else if(x>100)

		{

		throw new Exception2(x);

		}

		else 

		System.out.println("ok");

	}

public static void main(String args[])

{

	Test t=new Test();

	try{

	t.makeException(118);

	}

	catch(Exception1 e)

	{

	System.out.println(e);

	}

	catch(Exception2 e)

	{

	System.out.println(e);

	}

}

}