Java课堂练习-面向对象-继承实战题目（熟练运用）

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面向对象编程-继承

• 课堂练习

1. 编写Computer类，包含CPU、内存、硬盘等属性，getDeteils方法用于返回Computer的详细信息
2. 编写PC子类，继承Computer类，添加特有属性【品牌brand】
3. 编写NotePad子类，继承Computer类，添加特有属性【演示color】
4. 编写Test类，在main方法中创建PC和NotePad对象，分别给对象中特有的属性赋值，以及从Computer类继承的属性赋值，并使用方法打印输出信息

提示知识点

super关键字

通关源码

package com.tao.extend.last;

public class Computer {
    private String cpu;
    private String memory;
    private String disk;

    public Computer(String cpu, String memory, String disk) {
        this.cpu = cpu;
        this.memory = memory;
        this.disk = disk;
    }

    public String getCpu() {
        return cpu;
    }

    public void setCpu(String cpu) {
        this.cpu = cpu;
    }

    public String getMemory() {
        return memory;
    }

    public void setMemory(String memory) {
        this.memory = memory;
    }

    public String getDisk() {
        return disk;
    }

    public void setDisk(String disk) {
        this.disk = disk;
    }

    void getDetails(){
        System.out.println("CPU：" + cpu +"n内存：" + memory +
                "n硬盘：" + disk);
    }
}

PC类

package com.tao.extend.last;

public class PC extends Computer{
    private String brand;
    public PC(String cpu,String memory,String disk,String brand){
        super(cpu,memory,disk);
        this.brand = brand;
    }
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
    public void info(){
        System.out.println("===PC信息===");
        getDetails();
        System.out.println("品牌：" + brand);
    }

}

NotePad类

package com.tao.extend.last;

public class NotePad extends Computer{
    private String color;
    public NotePad(String cpu,String memory,String disk,String color){
        super(cpu,memory,disk);
        this.color = color;
    }
    public String getColor(){
        return color;
    }
    public void setColor(String color){
        this.color = color;
    }
    public void info(){
        System.out.println("===NotePad信息===");
        getDetails();
        System.out.println("颜色：" + color);
    }

}

Test测试类

package com.tao.extend.last;

public class Test {
    public static void main(String[] args) {
        PC pc = new PC("AMD","16G","sata2.0","戴尔G3");
        NotePad notePad = new NotePad("AMD","8G","m2","红色");

        pc.info();
        notePad.info();
    }
}

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