Sentinel值關閉FileWriter（Java）

Question

我試圖做一個基本的程序，允許用戶創建一個文本文件並添加一個單詞列表。當用戶寫入「停止」時 - 文件應該關閉。不幸的是，現在它只是一個無限循環。我在做什麼錯：

import java.util.Scanner; 
import java.io.*; 


    public class WordList 
    { 
public static void main(String[] args) throws IOException 
{ 
    System.out.println("What would you like to call your file? (include extension)"); 

    Scanner kb = new Scanner(System.in); // Create Scanner 

    String fileName = kb.nextLine(); // assign fileName to name of file 

    PrintWriter outputFile = new PrintWriter(fileName); // Create the file 

    String input; 

    System.out.println("Please enter the next word or stopnow to end"); //Prompt user for a word 

    input = kb.nextLine(); // assign input as the word 

    while (input != "stopnow") 

    { 
    outputFile.println(input); // print input to the file 

    System.out.println("Please enter the next word or stopnow to end"); //Prompt user for a word 

    input = kb.nextLine(); // assign input as the word 

    } 

    outputFile.close(); //Close the File 

    System.out.println("done!"); 




} 

} 

Answer 1

要檢查字符串是否相等，使用.equals

while (!input.equals("stopnow"))  
    { 
    outputFile.println(input); // print input to the file  
    System.out.println("Please enter the next word or stopnow to end"); //Prompt user for a word 
    input = kb.nextLine(); // assign input as the word  
    } 

什麼目前你正在做的是比較引用。