自定义异常throw

简单自定义一个年龄小于等于0，或者大于120会出现的异常

首先继承父类Exception，调用父类的构造器，这样才可以报出自己想要的异常

public class AgeException extends Exception {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public AgeException(String message) {
        super(message);
    }

}

然后进行小小的测试

package com.lianxi.zidingyichang;

public class Test {
    private int age;

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void ageException(int age) throws AgeException {
        if (age > 0 && age <= 120) {
            this.age = age;
            System.out.println("格式正确");
        } else {
                //抛出自己自定义异常
            AgeException exception = new AgeException("请输入正确年龄");
            throw exception;
        }
    }

    public static void main(String[] args) {
        Test test = new Test();
        try {
            test.ageException(120);
        } catch (AgeException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}