异常

异常

• Throwable

package oop.demo07;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！ new Test().test(1,0);  try{   //try监控区域      new Test().a();      System.out.println("a/b");  }catch (Error e){      System.out.println("E");  }catch (Exception e){      System.out.println("E");  }catch (Throwable t){      System.out.println("T");  }finally {   //处理善后     System.out.println("F"); }    }    public void a(){ b();    }    public void b(){ a();    }    public void test(int a,int b){ if (b==0){     throw new ArithmeticException();  //主动抛出异常（一般在方法中使用） }    }}

MyException

package oop.demo07;public class MyException extends Exception{    private int detail;    public MyException(int a) { this.detail = a;    }    //toString异常的打印信息    @Override    public String toString() { return "MyException{" + detail + '}';    }}

package oop.demo07;public class Test02 {    static void test(int a) throws MyException { System.out.println("传递参数为："+ a ); if (a>10){     throw new MyException(a); } System.out.println("OK");    }    public static void main(String[] args) { try {     test(1); } catch (MyException e) {     System.out.println("MyException=>"+e); }    }}