java入门都很简单呢

意思没怎么看懂，这两个类有什么关系，给个完整解答，给个代码，好好的计算机等级华东交大

Product类代码发一下

import java.util.Scanner;
public class Generator {
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        System.out.println("输入产品信息：");
        String str=in.next();
        Product product=createProduct(str,"-");
        System.out.println(product);
    }
 
    public static Product createProduct(String str,String deli){
        Product product=new Product();
        String[] split = str.split(deli);
        product.setName(split[0]);
        product.setQuantity(Integer.parseInt(split[1]));
        product.setPrice(Float.parseFloat(split[2]));
        return product;
    }
}

一个product类，一个测试类，一会给你个代码
Generatorl.java

public class Generator {
    
    public static Product createProduct(String str,String deli){
        Product pro = new Product();
        
        int index = str.indexOf(deli);
        String name = str.substring(0, index);
        int index2 = str.indexOf(deli, index+1);
        String nmb = str.substring(index+1,index2);
        String price = str.substring(index2+1,str.length());
        
        pro.setName(name);
        pro.setQuantity(Integer.parseInt(nmb));
        pro.setPrice(Float.parseFloat(price));
        return pro;
    }

    public static void main(String[] args){
        Product p = createProduct("monitor-100-999.9","-");
        System.out.println(p.toString());
    }
}

Product.java

public class Product {
    private String name;
    private int quantity;
    private float price;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getQuantity() {
        return quantity;
    }
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
    public float getPrice() {
        return price;
    }
    public void setPrice(float price) {
        this.price = price;
    }
    @Override
    public String toString() {
        return "Product [name=" + name + ", quantity=" + quantity + ", price="
                + price + "]";
    }
    

}

你得用题干中的Product，替换我这个就行，不能用我的

import java.math.BigDecimal;

public class Product {
    public String name;
    public Integer quantity;
    public BigDecimal price;

    public String getName() {
        return name;
    }

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

    public Integer getQuantity() {
        return quantity;
    }

    public void setQuantity(Integer quantity) {
        this.quantity = quantity;
    }

    public BigDecimal getPrice() {
        return price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Product{" +
                "name='" + name + '\'' +
                ", quantity=" + quantity +
                ", price=" + price +
                '}';
    }
}

import java.math.BigDecimal;
import java.util.Scanner;

public class Generator {
    public static Product createProduct(String str, String deli) {
        String[] split = str.split(deli);
        Product product = new Product();
        product.setName(split[0]);
        product.setQuantity(Integer.valueOf(split[1]));
        product.setPrice(new BigDecimal(split[2]));
        return product;
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            String nextLine = scanner.nextLine();
            Product product = createProduct(nextLine, "-");
            System.out.println(product.toString());
        }
    }
}

import java.util.Scanner;

class Product {
    private String _name;
    private int _quantity;
    private double _price;

    public Product() {
        _quantity = 0;
        _price = 0.0;
    }

    public String getName() {
        return _name;
    }

    public void setName(String name) {
        _name = name;
    }

    public int getQuantity() {
        return _quantity;
    }

    public void setQuantity(int quantity) {
        _quantity = quantity;
    }

    public double getPrice() {
        return _price;
    }

    public void setPrice(double price) {
        _price = price;
    }

    public String toString() {
        return "name: " + _name + ", quantity: " + _quantity + ", price: " + _price;
    }
}

class Generator {
    public static Product createProduct(String str, String deli) {
        Product product = new Product();
        String[] s = str.split(deli);
        product.setName(s[0]);
        product.setQuantity(Integer.parseInt(s[1]));
        product.setPrice(Double.parseDouble(s[2]));
        return product;
    }

    public static void main(String[] args) {
        System.out.println("Enter product info: ");
        Scanner scanner = new Scanner(System.in);
        Product product = Generator.createProduct(scanner.nextLine(), "-");
        System.out.println(product.toString());
    }
}