如何確保JButtons按照他們的文字按升序排列

Question

我的問題是我將如何在buttonHandler（）中使用循環來確定按下的按鈕的值是否大於前一個值。所以我在尋找的是一種方法，以確保誰點擊按鈕點擊他們按照他們看到的數量升序。這是一個基於點擊按鈕的GUI遊戲，以評估靈活性。

這裏是按鈕數組填充1-12的數字的方法，這也確保沒有重複的數字，因此它將具有從1-12的所有數字，無論如何。

public static JButton[] randNum() 
    { 

     arrayImage [0] = (int) (Math.random() * 12) + 1; 
     arrayImage [1] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [1] == arrayImage [0]) 
     { 
      arrayImage [1] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [2] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [2] == arrayImage [1] || arrayImage [2] == arrayImage [0]) 
     { 
      arrayImage [2] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [3] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [3] == arrayImage [2] || arrayImage [3] == arrayImage [1] || arrayImage [3] == arrayImage [0]) 
     { 
      arrayImage [3] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [4] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [4] == arrayImage [3] || arrayImage [4] == arrayImage [2] || arrayImage [4] == arrayImage [1] || arrayImage [4] == arrayImage [0]) 
     { 
      arrayImage [4] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [5] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [5] == arrayImage [4] || arrayImage [5] == arrayImage [3] || arrayImage [5] == arrayImage [2] || arrayImage [5] == arrayImage [1] || arrayImage [5] == arrayImage [0]) 
     { 
      arrayImage [5] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [6] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [6] == arrayImage [5] || arrayImage [6] == arrayImage [4] || arrayImage [6] == arrayImage [3] || arrayImage [6] == arrayImage [2] || arrayImage [6] == arrayImage [1] || arrayImage [6] == arrayImage [0]) 
     { 
      arrayImage [6] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [7] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [7] == arrayImage [6] || arrayImage [7] == arrayImage [5] || arrayImage [7] == arrayImage [4] || arrayImage [7] == arrayImage [3] || arrayImage [7] == arrayImage [2] || arrayImage [7] == arrayImage [1] || arrayImage [7] == arrayImage [0]) 
     { 
      arrayImage [7] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [8] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [8] == arrayImage [7] || arrayImage [8] == arrayImage [6] || arrayImage [8] == arrayImage [5] || arrayImage [8] == arrayImage [4] || arrayImage [8] == arrayImage [3] || arrayImage [8] == arrayImage [2] || arrayImage [8] == arrayImage [1] || arrayImage [8] == arrayImage [0]) 
     { 
      arrayImage [8] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [9] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [9] == arrayImage [8] || arrayImage [9] == arrayImage [7] || arrayImage [9] == arrayImage [6] || arrayImage [9] == arrayImage [5] || arrayImage [9] == arrayImage [4] || arrayImage [9] == arrayImage [3] || arrayImage [9] == arrayImage [2] || arrayImage [9] == arrayImage [1] || arrayImage [9] == arrayImage [0]) 
     { 
      arrayImage [9] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [10] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [10] == arrayImage [9] || arrayImage [10] == arrayImage [8] || arrayImage [10] == arrayImage [7] || arrayImage [10] == arrayImage [6] || arrayImage [10] == arrayImage [5] || arrayImage [10] == arrayImage [4] || arrayImage [10] == arrayImage [3] || arrayImage [10] == arrayImage [2] || arrayImage [10] == arrayImage [1] || arrayImage [10] == arrayImage [0]) 
     { 
      arrayImage [10] = (int) (Math.random() * 12) + 1; 
     } 
     arrayImage [11] = (int) (Math.random() * 12) + 1; 
     while (arrayImage [11] == arrayImage [10] || arrayImage [11] == arrayImage [9] || arrayImage [11] == arrayImage [8] || arrayImage [11] == arrayImage [7] || arrayImage [11] == arrayImage [6] || arrayImage [11] == arrayImage [5] || arrayImage [11] == arrayImage [4] || arrayImage [11] == arrayImage [3] || arrayImage [11] == arrayImage [2] || arrayImage [11] == arrayImage [1] || arrayImage [11] == arrayImage [0]) 
     { 
      arrayImage [11] = (int) (Math.random() * 12) + 1; 
     } 

     for (int x = 0 ; x <= 11 ; x++) 
     { 
      buttonArray [x] = new JButton ("" + arrayImage [x]); 
      buttonArray [x].setBackground (Color.orange); 
     } 
     for (int i = 0 ; i <= 11 ; i++) 
     { 
      buttonArray [i].setActionCommand ("" + arrayImage [i]); 

     } 

     return buttonArray; 
    } 

這是我在主要方法中引入按鈕數組的方法。

static JButton btnStart, buttonArray[] = new JButton [12]; 

賦予它們顏色，以及循環用於按順序爲它們賦予每個動作偵聽器。

for (int x = 0 ; x <= 11 ; x++) 
     { 
      buttonArray [x] = new JButton (""); 
      buttonArray [x].setBackground (Color.orange); 
     } 


     ButtonHandler onClick = new ButtonHandler(); 
     btnStart.addActionListener (onClick); 
     for (int y = 0 ; y <= 11 ; y++) 
     { 
      buttonArray [y].addActionListener (onClick); 
     } 

這裏是面板的介紹，並將面板添加到面板中。然後將面板添加到框架上。

JPanel gameBoard = new JPanel (new GridLayout (2, 6)); 
     gameBoard.setBackground (Color.orange); 
     JPanel gameContent = new JPanel (new GridLayout (1, 2)); 
     JPanel mainGame = new JPanel (new BorderLayout()); 



     //GAme Board 
     gameContent.add (btnStart); 
     gameContent.add (scoreOutput); 
     gameBoard.add (buttonArray [0]); 
     gameBoard.add (buttonArray [1]); 
     gameBoard.add (buttonArray [2]); 
     gameBoard.add (buttonArray [3]); 
     gameBoard.add (buttonArray [4]); 
     gameBoard.add (buttonArray [5]); 
     gameBoard.add (buttonArray [6]); 
     gameBoard.add (buttonArray [7]); 
     gameBoard.add (buttonArray [8]); 
     gameBoard.add (buttonArray [9]); 
     gameBoard.add (buttonArray [10]); 
     gameBoard.add (buttonArray [11]); 


     mainGame.add (gameBoard, BorderLayout.CENTER); 
     mainGame.add (gameContent, BorderLayout.PAGE_END); 



Container contentPane1 = questions.getContentPane(); 
     contentPane1.add (mainGame); 


questions.setSize (500, 250); 
     questions.setVisible (true); 

Answer 1

首先，您必須將數字作爲它們的名稱給按鈕。 你可以這樣做： 取一個數組和一個變量：在構造函數的n

int pressed[] = new int[12]; 
int n; 

設定值0。 現在的actionPerformed（ActionEvent的AE）方法：

if(pressed.length==0) 
    pressed[n]=Integer.parseInt(ae.getActionCommand()); 

else 
    Check if last number in array is less than current number 
    else show error 

可以使用獲得最後一個數字： 按下[pressed.length-1]