设计模式课程 设计模式精讲 3-2 开闭原则 coding

1　　　　课程讲解

2　　　　代码coding

1　　　　课程讲解

2　　　　代码coding

2.1　　基类

测试类：

package com.geely.design.principle.openclose;

public class TestJavaCourse {
    public static void main(String[] args) {
        Icourse icourse = new JavaCourse(96,"java开发教程",298.00);
        System.out.println("购买课程编号为："+icourse.getCourseId()+"；课程名称为："+icourse.getCourseName()+";课程价格为："+icourse.getCourcePrice());
    }
}

实体类：

package com.geely.design.principle.openclose;

public class JavaCourse implements Icourse {
    private Integer courseId;
    private String courseName;
    private Double coursePrice;

    public JavaCourse(Integer courseId, String courseName, Double coursePrice) {
        this.courseId = courseId;
        this.courseName = courseName;
        this.coursePrice = coursePrice;
    }

    @Override
    public Integer getCourseId() {
        return this.courseId;
    }

    @Override
    public String getCourseName() {
        return this.courseName;
    }

    @Override
    public Double getCourcePrice() {
        return this.coursePrice;
    }
}

接口：

package com.geely.design.principle.openclose;

public interface Icourse {
    Integer getCourseId();//获取课程ID
    String getCourseName();//获取课程名称
    Double getCourcePrice();//获取课程价格

}

打印日志：

购买课程编号为：96；课程名称为：java开发教程;课程价格为：298.0

Process finished with exit code 0