java - 编译代码时出现错误: Could not find or load main class .

Question

当我编译以下代码时，它会出现一条错误消息:

Error: Could not find or load main class javaapplication6.JavaApplication6
Java Result: 1. 

我使用的软件是Netbeans IDE8.0

import  java.util* ;
package javaapplication6 ;

public class JavaApplication6 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in) ;
        System.out.println ("Please enter your user name!");

        String userName = in.nextline ();
        System.out.println("please enter the passcode" + userName + ".");

        int passcodeFromUser = in.next.Int ();
        int passcode = 7001 ;

        if (passcodeFromUser == passcode) 
        {
        System.out.println("welcome" + username + "!" );
        }        
        else
        {
        System.out.println("Acess Denied");        
        }
    }

}

Answer 1

您必须将包语句声明为类的第一个语句，如下所示

package javaapplication6 ;
import  java.util.*;