捕获和抛出异常

五个关键字

• try
• catch
• finally
• throw
• throws

代码

package com.exception;

public class test {
    
    public static void main(String[] args) {
        
        new test().test(1, 0);


        //finally 可以不要finally，假设IO，资源，关闭！
    }

    //假设这方法中，处理不掉这个异常。方法上抛出异常
    public void test(int a,int b) throws ArithmeticException{
        if (b==0) {  // throw throws 
            throw new ArithmeticException();//主动抛出异常
        }
        System.out.println(a/b);
    }
}
/*
        //假设要捕获多个异常：从小到大！
        try {  //try监控区域


        } catch (Error e) {  //catch 捕获异常
            System.out.println("Error");
        } catch (Exception s){
            System.out.println("Exception");
        } catch (Throwable t) {
            System.out.println("Throwable");
        } finally { //处理善后工作
            System.out.println("finally");
        }
*/