Java自定义异常

概述

可以继承的父类有Throwable、Exception、RunTimeException，一般继承后两个，如果不要求调用者一定要处理抛出的异常，就继承RuntimeException

自定义异常类构造方法

idea可以自动生成，Alt+Insert快捷键，选择构造方法

代码如下

MyException.java

/**
 * @author LeDao
 * @company
 * @create 2021-07-07 10:43
 */
public class MyException extends RuntimeException{

    public MyException() {
    }

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

    public MyException(String message, Throwable cause) {
        super(message, cause);
    }

    public MyException(Throwable cause) {
        super(cause);
    }

    public MyException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}

People.java

/**
 * @author LeDao
 * @company
 * @create 2021-07-07 10:45
 */
public class People {

    private String name;
    private String sex;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) throws MyException {
        if ("男".equals(sex) || "女".equals(sex)) {
            this.sex = sex;
        } else {
            throw new MyException("性别必须是男或女");
        }
    }
}

Test.java

/**
 * @author LeDao
 * @company
 * @create 2021-06-21 12:38
 */
public class Test {

    public static void main(String[] args) {
        People people = new People();
        people.setSex("11");
    }
}