這個java代碼編譯，但是是錯誤的。你能告訴我它有什麼問題嗎？

Question

下面是代碼。我真的需要幫助，因爲我不知道它有什麼問題。正如我所說，它編譯乾淨，但每當我運行它，它都無法執行。謝謝！

import java.util.Scanner; 
public class whatThe 
{ 
    public static void main(String[ ] args){ 

    Scanner scan = new Scanner(System.in); 

    int i; 
    String s; 
    char c; 

    System.out.print("Please enter a number: "); 
    i = scan.nextInt(); 
    System.out.println(i); 
    System.out.println(); 

    System.out.print("Please input three words separated by spaces: "); 
    s = scan.next(); 
    System.out.println(s); 
    System.out.println(); 

    System.out.print("Please input something: "); 
    s = scan.nextLine(); 
    System.out.println(s); 
    System.out.println(); 

    System.out.print("Please enter another number: "); 
    i = scan.nextInt(); 
    System.out.println(i); 
    System.out.println(); 

    System.out.print("Please input a word: "); 
    s = scan.nextLine(); 
    c = s.charAt(0); 
    System.out.println(c); 
    System.out.println(); 

    System.out.println("Good bye"); 

    } 
} 

Answer 1

package javaapplication9; 
import java.util.Scanner; 
import java.io.BufferedInputStream; 
public class dumb 
{ 
    public static void main(String[ ] args){ 

     Scanner scan = new Scanner(System.in); 

     int i; 
     String s; 
     char result;   


     System.out.print("Please enter a number: "); 
     i = scan.nextInt(); 
     System.out.println(i); 
     System.out.println(); 

     System.out.print("Please input three words separated by spaces: "); 
     s = scan.next(); 
     System.out.println(s); 
     scan.next(); 


     System.out.print("Please input something: "); 
     scan.nextLine(); 
     s = scan.nextLine(); 
     System.out.println(s); 
     System.out.println(); 

     System.out.print("Please enter another number: "); 
     i = scan.nextInt(); 
     System.out.println(i); 
     System.out.println(); 

     System.out.print("Please input a word: "); 
     scan.nextLine(); 
     s = scan.nextLine(); 
     result = s.charAt(0); 
     System.out.println(result); 

     System.out.println(); 

     System.out.println("Good bye"); 

     } 
    } 

Answer 2

試試這個：

Scanner scan = new Scanner(System.in); 
int i; 
String s; 
char c; 
System.out.print("Please enter a number: "); 
i = scan.nextInt(); 
scan.nextLine(); 
System.out.println(i); 
System.out.println(); 

System.out.print("Please input three words separated by spaces: "); 
s = scan.nextLine(); 

System.out.println(s); 
System.out.println(); 

System.out.print("Please input something: "); 
s = scan.nextLine(); 
System.out.println(s); 
System.out.println(); 

System.out.print("Please enter another number: "); 
i = scan.nextInt(); 
scan.nextLine(); 
System.out.println(i); 
System.out.println(); 

System.out.print("Please input a word: "); 
s = scan.nextLine(); 
c = s.charAt(0); 
System.out.println(c); 
System.out.println(); 

System.out.println("Good bye"); 

因此，每個scan.nextInt（）後，做scan.nextLine（），所以你可以繼續進行。