package top.exception.demo01;

public class Demo01 {

}

package top.exception.demo01;

public class Test {
    public static void main(String[] args) {
        int a =1;
        int b =0;

        //假设要捕获多个异常,从小到大！
        try { //try监控区域
            if (b==0){ // throw throws
                throw new ArithmeticException();//主动抛出异常
            }
            System.out.println(a/b);
        }catch (ArithmeticException e){ //catch(想要捕获的异常类型！) 捕获异常
            System.out.println("程序出现异常,变量b不能为0");
        }finally { //处理善后工作
            System.out.println("finally");
        }
        // finally 可以不要finally, 假设IO,资源,关闭
    }
    public void a(){
        b();
    }

    public void b(){
        a();
    }
}

package top.exception.demo01;

public class Test2 {
    public static void main(String[] args) {
        int a = 1;
        int b = 0;

        try { //快捷键 ctrl+Alt+t
            System.out.println(a/b);
        } catch (Exception e) {
            System.exit(0);
            e.printStackTrace(); //打印错误的栈信息
        } finally {
        }
    }
}

package top.exception.demo02;

public class MyException extends Exception{

    //传递数字> 10;
    private  int detail;

    public MyException(int a) {
        this.detail = a;
    }
    //toString

    @Override
    public String toString() {
        return "MyException{" +
                "detail=" + detail +
                '}';
    }
}

package top.exception.demo02;

public class Test {

    //可能存在异常的方法

    static void test(int a) throws MyException {

        System.out.println("传递的参数为: "+a);

        if (a>10){
            throw new MyException(a); //抛出
        }

        System.out.println("ok");

    }

    public static void main(String[] args) {
        try {
            test(1);
        } catch (MyException e) {
            //增加一些处理异常的代码
            System.out.println("MyException=>" +e);
        }
    }

}