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);
	}
}
}