简单的自己定义异常类

1：编写异常类

public class SexException extends Exception {
    public SexException(){
        System.out.println("性别设置异常");
    }
    public SexException(String message){
        super(message);
    }
}
2：编写对象类

public class Student {
        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 SexException {
                if("男".equals(sex)||"女".equals(sex)){
                        this.sex = sex;
                }else{
                        throw new SexException();
                }

        }

        @Override
        public String toString() {
                return "Student{" +
                        "name='" + name + '\'' +
                        ", sex='" + sex + '\'' +
                        '}';
        }
}

3：测试

public class Test05 {
    public static void main(String[] args) {
        Student stu = new Student();
        stu.setName("张三");
        try{
            stu.setSex("12");
        }catch (SexException e){
            e.printStackTrace();
        }
        System.out.println(stu);
    }
}