当我使用javac来编译多个.java文件时，出现了一些“重复的类”错误，但是在我的代码中找不到错误]]

Question

当我使用javac编译多个。java

文件时，出现了一些“ duplicate class”错误，但是在代码中找不到错误。

有四个。java

文件，所有这些文件都在Windows中的同一文件夹中。

1. MyApp.java文件中的代码：

import dx.*;
import dx.shapes.*;

class MyApp {
    public static void main(String[] args) {
        System.out.println("This is a test application."); 

        Rectangle rect = new Rectangle(10, 20);
        rect.Speak();

        Circle circle = new Circle(15);
        circle.Speak();

        Worker worker = new Worker();
        worker.Speak();
    }
}

2. Rectangle.java文件中的代码：

    package dx.shapes;

    public class Rectangle {
        private int x, y;
        private int width, height;

        public Rectangle() {
            this(0, 0, 1, 1);
        }
        public Rectangle(int width, int height) {
            this(0, 0, width, height);
        }
        public Rectangle(int x, int y, int width, int height) {
            this.x = x;
            this.y = y;
            this.width = width;
            this.height = height;
        }
        public void Speak(){
            System.out.println("I'm a rectangle, width:" + this.width + ", height:" + this.height);
        }
    }

3. Circle.java文件中的代码：

package dx.shapes;

public class Circle {
    private int x, y;
    private int radius;

    public Circle() {
        this(0, 0, 10);
    }
    public Circle(int radius) {
        this(0, 0, radius);
    }
    public Circle(int x, int y, int radius) {
        this.x = x;
        this.y = y;
        this.radius = radius;
    }
    public void Speak(){
        System.out.println("I'm a circle, radius:" + this.radius);
    }
}

4. Worker.java文件中的代码：

package dx;

public class Worker {
    public void Speak(){
        System.out.println("I'm a worker.");
    }
}

在Windows命令行中，我使用javac来编译这些源代码：

javac MyApp.java Rectangle.java Circle.java Worker.java
但是我唯一得到的是错误列表：

Rectangle.java:3: error: duplicate class: dx.shapes.Rectangle
public class Rectangle {
       ^
MyApp.java:8: error: cannot access Rectangle
        Rectangle rect = new Rectangle(10, 20);
        ^
  bad source file: .\Rectangle.java
    file does not contain class Rectangle
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
Circle.java:3: error: duplicate class: dx.shapes.Circle
public class Circle {
       ^
MyApp.java:11: error: cannot access Circle
        Circle circle = new Circle(15);
        ^
  bad source file: .\Circle.java
    file does not contain class Circle
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
Worker.java:3: error: duplicate class: dx.Worker
public class Worker {
       ^
MyApp.java:14: error: cannot access Worker
        Worker worker = new Worker();
        ^
  bad source file: .\Worker.java
    file does not contain class Worker
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
6 errors
我不知道怎么了。为什么？

[当我使用javac来编译多个.java文件时，出现了一些“重复类”错误，但是在我的代码中找不到错误。有四个.java文件，所有这些文件都位于...

Answer 1

尝试一下：

Answer 2

完全编译目录中的所有文件

Answer 3

您只能调用主类，例如，MyApp仅使主类javac MyApp.java紧随java MyApp