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：