个人技术分享

需求1：

代码呈现

商品类型

public class Goods {
    private String id;
    private String name;
    private double price;
    private int count;


    public Goods() {
    }

    public Goods(String id, String name, double price, int count) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.count = count;
    }

    /**
     * 获取
     * @return id
     */
    public String getId() {
        return id;
    }

    /**
     * 设置
     * @param id
     */
    public void setId(String id) {
        this.id = id;
    }

    /**
     * 获取
     * @return name
     */
    public String getName() {
        return name;
    }

    /**
     * 设置
     * @param name
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取
     * @return price
     */
    public double getPrice() {
        return price;
    }

    /**
     * 设置
     * @param price
     */
    public void setPrice(double price) {
        this.price = price;
    }

    /**
     * 获取
     * @return count
     */
    public int getCount() {
        return count;
    }

    /**
     * 设置
     * @param count
     */
    public void setCount(int count) {
        this.count = count;
    }

    public String toString() {
        return "Goods{id = " + id + ", name = " + name + ", price = " + price + ", count = " + count + "}";
    }
}

测试类

public class GoodsTest {
    public static void main(String[] args) {
        //创建一个长度为3的数组
        Goods [] arr = new Goods[3];

        //创建三个商品对象
        //商品类型按快捷键  Ctrl + p
        Goods g1 = new Goods("001","华为mate70pro",8999.0,100);
        Goods g2 = new Goods("002","保温杯",299.0,50);
        Goods g3 = new Goods("003","枸杞",12.7,70);

        //把商品添加到数组中
        arr[0] = g1;
        arr[1] = g2;
        arr[2] = g3;
        
        //遍历数组
        for (int i = 0; i < arr.length; i++) {
            Goods goods = arr[i];
            System.out.println(goods.getId() + ", "+goods.getName() + ", "+goods.getPrice() + ", " + goods.getCount());
        }

    }
}

运行结果

需求2

知识点： 键盘录入

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        //键盘录入
        //第一套体系
        //nextInt();接受整数
        //nextDouble();接受小数
        //next();接受字符串
        //遇到空格 制表符 回车就停止接受


        //第二套体系
        //nextLine();接受字符串
        //可以接受空格制表符  回车结束

        /*Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个整数");
        int num1 = sc.nextInt();
        System.out.println(num1);
        System.out.println("请输入第二个整数");
        int num2 = sc.nextInt();
        System.out.println(num2);
         */

        Scanner sc = new Scanner(System.in);
        System.out.println("请输入第一个字符串");
        String line1 = sc.nextLine();
        System.out.println(line1);
        System.out.println("请输入第二个字符串");
        String line2 = sc.nextLine();
        System.out.println(line2);





    }
}

package Test;

import java.util.Scanner;

public class Test2 {
    public static void main(String[] args) {
        //键盘录入两套体系不能混用
        //弊端:先用nextInt 再用nextLine 会导致nextLine接受不到数据
        Scanner sc = new Scanner(System.in);
        System.out.println("输入一个整数");
        int number = sc.nextInt();
        System.out.println(number);
        System.out.println("请输入一个字符串");
        String line = sc.nextLine();
        System.out.println(line);

    }
}

代码呈现

package Car;

public class Car {
    private String brand;
    private int price;
    private String color;


    public Car() {
    }

    public Car(String brand, int price, String color) {
        this.brand = brand;
        this.price = price;
        this.color = color;
    }

    /**
     * 获取
     * @return brand
     */
    public String getBrand() {
        return brand;
    }

    /**
     * 设置
     * @param brand
     */
    public void setBrand(String brand) {
        this.brand = brand;
    }

    /**
     * 获取
     * @return price
     */
    public int getPrice() {
        return price;
    }

    /**
     * 设置
     * @param price
     */
    public void setPrice(int price) {
        this.price = price;
    }

    /**
     * 获取
     * @return color
     */
    public String getColor() {
        return color;
    }

    /**
     * 设置
     * @param color
     */
    public void setColor(String color) {
        this.color = color;
    }

    public String toString() {
        return "Car{brand = " + brand + ", price = " + price + ", color = " + color + "}";
    }
}

测试类

package Car;

import java.util.Scanner;

public class carTest {
    public static void main(String[] args) {
        //创建一个数组来存3个汽车对象
        Car[] arr = new Car[3];

        //创建汽车对象,数据来自于键盘录入
        Scanner sc = new Scanner(System.in);
        for (int i = 0; i < arr.length ; i++) {
            //创建汽车对象
            Car c = new Car();
            //输入品牌
            System.out.println("输入汽车的品牌");
            String brand = sc.next();
            c.setBrand(brand);
            //输入价格
            System.out.println("请输入价格");
            int price = sc.nextInt();
            c.setPrice(price);
            //输入颜色
            System.out.println("输入颜色");
            String color = sc.next();
            c.setColor(color);

            //把汽车对象添加到数组中
            arr[i] = c;
        }
        //遍历数组
        for (int i = 0; i < arr.length ; i++) {
            Car car = arr[i];
            System.out.println(car.getBrand() + ", "+ car.getPrice() + ", "+ car.getColor() );
        }
    }
}

运行结果