評估按鈕單擊Java

Question

我有以下代碼：

for (int i = 0; i < dynamicVariable; i++) {
    String tmpString = myArray[i];
    JToggleButton tButton = new JToggleButton(tmpString);
    myJPanel.add(tButton);
    tButton.addActionListener(this);
}
JButton go = new JButton("go");
myJPanel.add(submit);

我在其中創建x個按鈕並將它們添加到面板中。 現在，我需要做的是，當用戶選擇正確的按鈕並按下按鈕時。 我評估所有選定的按鈕。 如果它們沒問題，則輸出true ，否則輸出false 。 如果他們選擇除一個以外的所有正確答案，則應評估為false 。 我只是不知道如何評估在actionPerformed()方法中選擇的每個按鈕。

Answer 1

將所有按鈕放入List或數組中，然后在單擊“ go按鈕時對其進行迭代

private List<JToggleButton> listOfButtons;
//...
listOfButtons = new ArrayList<>(dynamicVariable);
for (int i=0; i<dynamicVariable;i++){
    String tmpString= myArray[i];
    JToggleButton  tButton = new JToggleButton (tmpString);
    listOfButtons.add(tButton);
    myJPanel.add(tButton);
    tButton.addActionListener(this);
}
JButton go= new JButton("go");
myJPanel.add(submit);
//...

// ActionListener of go button
public void actionPerformed(ActionEvent evt) {
    for (JToggleButton btn : listOfButtons) {
        if (btn.isSelected()) {
            // Evaluate the state, set some flags
            // get funky tonight
        }
    }
    // Evaluate the final state once you know what
    // buttons are actually selected
}

Answer 2

您應該首先為每個按鈕映射正確的值，然后如果用戶單擊“ 轉到”按鈕，則遍歷按鈕，檢查每個按鈕是否已正確打開或關閉。

簡而言之：

• 首先，我們將正確答案定義為一個映射，每個切換按鈕都綁定到一個布爾值，指示該語句是否正確；
• 然后，我們將所有切換按鈕添加到面板中。
• 然后，向“ 轉到”按鈕添加一個偵聽器，該偵聽器確定是否正確按下了選定的按鈕或不按下選定的按鈕。

這是代碼：

// Put all values into a map. If the mentioned fruit has the mentioned
// color, then the answer is correct.
private Map<JToggleButton, Boolean> correctAnswers = new HashMap<JToggleButton, Boolean>() {{
    put(new JToggleButton("A strawberry is red"), true);
    put(new JToggleButton("A banana is blue"), false);
    put(new JToggleButton("A lemon is yellow"), true);
    put(new JToggleButton("An orange is orange"), true);
}};

void init() {
    for (JToggleButton button : map.keySet()) {
        // button.setActionListener(this); // The toggle buttons themselves
        // do not need to have a listener, do they? Only when the user clicks
        // "go", then the buttons should be evaluated, right?
        myJPanel.add(button);
    }
    JButton submitButton = new JButton("go");
    submitButton.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent event) {
            boolean wrong = false; // It's all good now, until a wrong
            // answer is found.

            // Iterate over all entries of our map.
            for (JToggleButton button : this.buttons.keySet()) {
                // Check if the selection state of the toggle button is
                // equal to whether the answer is yes or no.
                if (button.isSelected() != this.buttons.get(button)) {
                    // A button is pressed while it should not be pressed
                    // OR vice versa. Let's mark that at least one button
                    // is incorrect.
                    wrong = true;
                }
            }

            // We found at least one incorrect button.
            if (wrong) {
                // DO SOMETHING
            }
        }
    });
    myJPanel.add(submitButton);
}

我尚未測試此代碼，但它應該可以工作。