Question

我无法弄清楚如何将字符串需要传递给下面的方法。

stringToFile（）;和 readingStringFromFile（）;

我知道我需要在主方法中传递字符串，但我无法弄清楚如何。

提前致谢。

public static void main(String[] args)  {
Scanner keyboard = new Scanner (System.in);//allow for use of keyboard input

            mask(keyboard);

            printingString();

            fileName(keyboard);

            stringToFile();

            readingStringFromFile();



}
public static int mask(Scanner keyboard){
    int holder;//creats a temp int
    System.out.print("Enter the encryption mask: ");//asks fro encrytipon
    holder = keyboard.nextInt();//userinput to holder
    keyboard.nextLine();//consumption 
    return holder;//returns encryption mask

}

public static void fileName(Scanner keyboard){
    String fileName ="a";
    System.out.print("\nEnter a file name without extensions: ");
    fileName = keyboard.next();//userinput to fileName
    String completeFileName = fileName + ".txt";
}

public static void printingString(){
    System.out.println("Original random character string:");
    for (int i = 0; i < 50; i++)//loop to obtain 50 random characters
    {
      char randomChar = (char) ((Math.random()*255)+32);
      System.out.print((randomChar));
    }
}

public static void stringToFile(String completeFileName, String printingString)
        throws FileNotFoundException {
   System.out.println("Saving Original random character string..."); 
   File myFile = new File (completeFileName);
    Scanner fileReader = new Scanner (myFile);

    PrintWriter fileWriter = new PrintWriter (myFile);
    fileWriter.println(printingString);
    fileWriter.close();
}

public static void readingStringFromFile(String completeFileName)
        throws FileNotFoundException {
    System.out.println("Original random character string from the file");
    File myFile = new File (completeFileName);
    Scanner fileReader = new Scanner (myFile);

    String lineFromFile = fileReader.nextLine();
    System.out.println(lineFromFile);
}

Answer 1

在你的主要方法中你应该得到输入 -

    System.out.println("Enter file name : ");
    String completeFileName = keyboard.next();

    System.out.println("Enter string : ");
    String printingString = keyboard.next();

    stringToFile(completeFileName, printingString);

在方法中传递字符串

1 个答案: