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  • Java第二次作业第五题

    自定义异常类,非法年龄类,并在person3类中使用此类,根据情况抛出异常,并进行处理。

    package naizi;
    
    class IllegalAgeException extends Exception{    //无效年龄异常类
    public IllegalAgeException(String s){
    	super(s);
    }
    public IllegalAgeException(){
    	this("");
    }
    }
    
    public class Person3{
    protected String name; //姓名
    protected int age;   //年龄
    public Person3(String name,int age)throws IllegalAgeException{ //抛出异常的方法,请准确写出抛出的异常类
    	this.set(name);
    	this.set(age);	
    } 
    public void set(String name){
    	if (name==null || name=="")
    		this.name = "姓名未知";
    	else
    		this.name = name;
    }
    public void set(int age) throws IllegalAgeException {   //抛出异常的方法,请准确写出抛出的异常类
    	if (age>=0 && age<100)
    		this.age = age;
    	else
    		throw new IllegalAgeException(Integer.toString(age));   //抛出IllegalAgeException的类
    }
    public void set(String name, int age) throws IllegalAgeException {   //抛出异常的方法,请准确写出抛出的异常类
    	this.set(name);
    	this.set(age);
    }
    public String toString() {
    	return this.name+","+this.age+"岁";	
    }
    public void print(){
    	System.out.println(this.toString());
    }
    public static void main(String args[]){
    	Person3 p1=null;
    	try{        //写出异常处理结构语句
    		p1 = new Person3("李小明",20);    //调用声明抛出异常的方法,必须写在try语句中,否则编译不通过
    		p1.set(121);	
    	}catch (IllegalAgeException e){     //捕获自定义异常类,而非Exception类
    		e.printStackTrace();            //显示异常栈跟踪信息	
    	}finally {
    		p1.print();		
    	}	
    }
    }  
    

    运行结果如图:

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  • 原文地址:https://www.cnblogs.com/zqm-sau/p/9807699.html
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