shell - 用命令行对javac进行编译，总是『cannot find symbol』，但是eclipse执行不会出现问题

Question

代码如下
分别是enum和testclass两个java文件

package cs121assignment1;

public enum Food {
    APPLE("fruit", 55),
    BANANA("fruit", 80),
    CARROT("vegetable", 60);
    
    private final String catagory; //vegetable or fruit
    private final int calorie;
    
    Food(String catagory, int calorie){
        this.catagory = catagory;
        this.calorie = calorie;
    }
    
    public int getCalorie(){
        return calorie;
    }
    
    public String getCatagory(){
        return catagory;
    }
}

package cs121assignment1;

public class TestFood {

public static void main(String[] args){
    System.out.println("All foods:");
    
    for(Food food : Food.values()){
        System.out.printf("%s, catagory: %s, calorie: %d kilocalorie each\n", food, food.getCatagory(), food.getCalorie());
    }
        
}

eclipse中运行结果如下：

但是用命令行执行javac的时候显示如下：

Answer 1

cd Desktop;
javac cs121assignment1.TestFood;

不要
cd Desktop/cs121assignment1;

Answer 2

Delete all the package statements in the first line of the code
cd to the folder containing the .java file
Execute javac *.javajavac *.java
得到两个.class文件
java TestFoodGet two .class files
java TestFood

will run successfully

This problem is actually a problem with the usage of package
Another method is not to remove the package in the first line of the filejavac -d ~/Desktop/cs121assignment1 Food.java TestFood.java
会生成一个以cs121assignment1为命名的新文件夹包含Food.class 和 TestFood.class
在新生成的cs121assignment1的上层目录用java cs121assignment1.TestFoodjavac -d ~/Desktop/cs121assignment1 Food.java TestFood.java

It will generate a file ending with The new folder named cs121assignment1 contains Food.class and TestFood.class🎜Use java in the upper directory of the newly generated cs121assignment1 cs121assignment1.TestFood will run successfully🎜