Java-扩展类

我有一个 session 类，我想创建一个扩展 session 的BusinessMeeting类。

这是我的 session 类(class):

public class Meeting {

private String name;
private String location;
private int start, stop;

public Meeting(String name, String location, int start, int stop) {

    this.name = name;

    this.location = location;

    this.start = start;

    this.stop = stop;

}

这是我的BusinessMeeting类(class):

public class BusinessMeeting extends Meeting {

    public BusinessMeeting() {

        super();

    }

}

在我的BusinessMeeting类中，出现错误:

构造函数Meeting类中的Meeting不能应用于给定的类型；
必需:String，String，int，int
找到:没有参数

我不太确定为什么会收到该错误消息。 BusinessMeeting类不应该从Meeting类继承所有变量吗？

最佳答案

public class Meeting {
    public Meeting(String name, String location, int start, int stop) {

        this.name = name;

        this.location = location;

        this.start = start;

        this.stop = stop;

    }
}

现在说您想用BusinessMeeting扩展businessId类。

public class BusinessMeeting {
    private Integer businessId;

    public BusinessMeeting(String name, String location, int start, int stop, int business) {
        // because super calls one of the super class constructors(you can overload constructors), you need to pass the parameters required.
        super(name, location, start, stop);
        businessId = business;
    }
}

关于Java-扩展类，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19501638/