exception学习小结

自定义跑出异常在类Person中

class Person{
   private  int age;
 
   public void setAge(int age){

	if(age < 0){

		RuntimeExcetion e = new RuntionExcetion("年龄不能为负数");

		throw e;

	}
      this.age = age;
   }
}

在主函数中若如下调用：

Person p = new Person();
p.setAge(-10);

则抛出相应异常：RunctionExcetion:年龄不能为负数;

在Person类中这样做：

class Person{
   private  int age;
 
   public void setAge(int age) throw Exxception{

	if(age < 0){

		Excetion e = new Excetion("年龄不能为负数");

		throw e;

	}

this.age = age; }}

那么在相应的主函数里要对异常进行抛出：

Person p = new Person();
try{
   p.setAge(-10);
}catch(Excetion e){
 	System.out.println(e);
}

则抛出相应异常：Excetion:年龄不能为负数;