错误:')'预期错误:非法启动表达式

Question

//8.    
//----------------------------------------------------------------
//-------- Display orignal and encrypted message information
//----------------------------------------------------------------
    private void displayEncryptedMessage(String originalMessage, String encryptedMessage) {
        System.out.println("");
        System.out.println("");
        System.out.println("");
        System.out.println("Enter Message to be encrypted: ");
        System.out.println("");
        System.out.println("");
        System.out.println("");
        System.out.println("   Plain Text : " + originalMessage);

    }

// 9
//----------------------------------------------------------------
// Encrypted it by substituting the character with the corresponding character in the cipher.
// 
//----------------------------------------------------------------
    private void encrypt(String cipher){
      int letterPosition;
      String encryptedMessage = "";
      String originalMessage = Keyboard.readInput();

      displayEncryptedMessage(String originalMessage, String encryptedMessage);

      for (letterPosition=0; letterPosition<originalMessage.length(); letterPosition++){
        char replaceCipherLetter = cipher.charAt(letterPosition);
        encryptedMessage += replaceCipherLetter;}
      System.out.println("   Cipher Text: " + encryptedMessage);
      } 

我是Java的新手,所以你的所有评论都会非常感激... SInce方法8.无效,它不会返回任何值吗？如果我想把8放入9 displayEncryptedMessage(String originalMessage, String encryptedMessage);,是什么Id作为参数？为什么我会收到这些错误？

  Error: ')' expected 
  Error: illegal start of expression

Answer 1

当您调用该方法时,您必须只传递值,方法调用时不允许类型声明.

displayEncryptedMessage(String originalMessage, String encryptedMessage);

应该

 displayEncryptedMessage(originalMessage, encryptedMessage);