JAVA：爲什麼我不能訪問同一個類中的方法？

Question

我似乎無法找出爲什麼我的靜態方法無法調用同一類中的其他方法。我該怎麼辦？

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

    public class MashupII { 

     public void Append(Sound clip, boolean rev, double scale){ 


     //Void methods... 


      //main method 
     public static void main (String [] args) { 

     Scanner keyboard = new Scanner(System.in); 

     clips = new Sound[100]; 

     System.out.println("Please enter your command (A, I, D, P or Q)"); 
     char command = Character.toUpperCase(keyboard.next().charAt(0)); 

     while (command != 'Q'){ 
      switch (command){ 
      case 'A': 

       //APPENDING 
       //pick the clip 
       System.out.println("Please pick a file.");  
       Sound clip = new Sound(FileChooser.pickAFile()); 

       //reversing 
       System.out.println("Would you like to reverse the clip? (Y|N)"); 
       String reverse = keyboard.nextLine(); 

       boolean rev = reverse.equalsIgnoreCase("Y"); 


       //scaling 
       System.out.println("How much should the clip be scaled? (1 is no scaling)"); 
       double scale = keyboard.nextDouble(); 

       clips.Append(clip,rev,scale); 

       break; 
      case 'I': 
       break; 
      case 'D': 
       System.out.println("Which clip would you like to delete? (1- end)"); 
       int p = keyboard.nextInt(); 
       clips.Delete(p); 
       break; 
      case 'P': 
       break; 
      default: 
       System.out.println("Error! Please enter one of the available commands (A, I, D, P or Q)"); 
      } 
      System.out.println("Please enter another command (A, I, D, P or Q)"); 
      command = Character.toUpperCase(keyboard.next().charAt(0)); 
     } 
     } 
} 

我得到了開關情況下的錯誤。它給了我一個沒有找到的符號。任何幫助將是偉大的！

Answer 1

剪輯不是您的MashupII類的實例，這就是您無法調用MashupII的append（）方法的原因。