使用進口掃描儀時出錯

Question

這是從介紹到編程類，unfortunatley我的教師根本沒有幫助，所以即時尋求專業人士的幫助。我使用最新的JDK版本。感謝任何能夠提供幫助的人。

import java.util.Scanner; //the error here reads : incorrect package. but im in the correct package 

package calculate.a.tip.ricardo.penaloza; // the error here reads: class,interface or enum expected 

public class CalculateATipRicardoPenaloza 
{ 


    public static void main(String[] args) 
    { 
     Scanner input = new Scanner (System.in); 
     System.out.println("Enter a number for radius"); 
     double radius = input.nextDouble(); 

     double area = radius * radius * 3.14; 

     System.out.println("The area for the circle of radius" + 
       radius + "is" + area); 
    } 

} 

Error: Could not find or load main class calculate.a.tip.ricardo.penaloza.CalculateATipRicardoPenaloza 
Java Result: 1 
BUILD SUCCESSFUL (total time: 5 seconds) 

Answer 1

一個package聲明必須出現在任何import陳述或class聲明。