Java自定义异常类的使用实例

package com.hope;
/**
 * 自定义异常类
 */
public class MyException extends Exception {
    /**
     * 通过构造函数获取异常信息
     * @param message
     */
    public MyException(String message) {
        super(message);
    }
}

封装类

package com.hope;

public class Student {
    private  String id;
    private String name;
    private  String age;

    public Student(String id, String name, String age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

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

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public String getAge() {
        return age;
    }

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

实现类

package com.hope;

public class StuImpl {
    int sum=2;
    int count=0;
    Student [] s= new Student[sum];

    public void addStu(Student student) throws Exception {
        if(count<sum){
            s[count]=student;
            count++;
            System.out.println("添加成功");
        }else {
            throw new MyException("下标越界");
        }
    }

    public static void main(String[] args) throws Exception {
        Student stu = new Student("01", "张三", "18");
        Student stu1 = new Student("02", "lisi", "18");
        Student stu2 = new Student("03", "wu", "18");
        StuImpl s=new StuImpl();
        s.addStu(stu);
        s.addStu(stu1);
        s.addStu(stu2);
    }
}