java创建一个水果类，其中包含私有属性名称、价格和重量，然 后创建方法去访问和修改这些属性的测试类

以下是Java创建一个水果类，并包含私有属性名称、价格和重量，以及访问和修改这些属性的测试类的示例代码：

public class Fruit {
    private String name;
    private double price;
    private double weight;

    public Fruit(String name, double price, double weight) {
        this.name = name;
        this.price = price;
        this.weight = weight;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

    public double getWeight() {
        return weight;
    }

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

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

    public void setWeight(double weight) {
        this.weight = weight;
    }
}

public class FruitTest {
    public static void main(String[] args) {
        Fruit apple = new Fruit("Apple", 1.99, 0.3);
        System.out.println("Name: " + apple.getName());
        System.out.println("Price: $" + apple.getPrice());
        System.out.println("Weight: " + apple.getWeight() + "kg");

        apple.setPrice(2.49);
        System.out.println("Updated Price: $" + apple.getPrice());

        apple.setWeight(0.4);
        System.out.println("Updated Weight: " + apple.getWeight() + "kg");

        apple.setName("Red Apple");
        System.out.println("Updated Name: " + apple.getName());
    }
}

运行结果如下：

Name: Apple
Price: $1.99
Weight: 0.3kg
Updated Price: $2.49
Updated Weight: 0.4kg
Updated Name: Red Apple