Question

private class ButtonHandler implements ActionListener
  {
    @Override
    public void actionPerformed(ActionEvent e) 
    {
         if(checkboxcheck1 == 1)
            {
             textFieldSum.setText(String.valueOf(counter));
            }
         else if (checkboxcheck2 == 1)
         {
              textFieldSum1.setText(String.valueOf(counter1));
         }

         else
             {
              checkboxcheck1 = 0;
             }
    }

我创建了2个复选框，1个按钮和2个文本字段。当我单击复选框，然后单击按钮时，文本字段将显示结果。如果我同时点击2复选框，我想让按钮显示结果。有人能帮帮我吗。我想写一个循环，但我不知道如何写它。非常感谢你们的帮助。

编辑1：这是我的全部代码

public class Count extends JFrame

{

private JLabel labelSum = new JLabel("Display: ");

private JTextField textFieldSum = new JTextField(1);

private JCheckBox chckbxNewCheckBox1 = new JCheckBox("A");

private JButton btnYes = new JButton("YES");

private JTextField textFieldSum1 = new JTextField(1);

private JCheckBox chckbxNewCheckBox2 = new JCheckBox("B");

private int counter;

private int counter1;

private int checkboxcheck1 = 0;

private int checkboxcheck2 = 0;

public Count()

{
    super("Yolo Coto");

    super.setBounds(150, 150, 500, 500);

    GridBagLayout gridBagLayout = new GridBagLayout();

    gridBagLayout.columnWidths = new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

    gridBagLayout.rowHeights = new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

    gridBagLayout.columnWeights = new double[]{0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, Double.MIN_VALUE};

    gridBagLayout.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE};

    super.getContentPane().setLayout(gridBagLayout);

    //checkbox

    add(chckbxNewCheckBox1);

    textFieldSum.setEditable(false);

    CheckBoxHandler handler = new CheckBoxHandler();

    chckbxNewCheckBox1.addItemListener(handler);

    //textfield

    add(textFieldSum);

    //button

    add(btnYes);

    ButtonHandler handler1 = new ButtonHandler();

    btnYes.addActionListener(handler1);


    //checkbox2

    add(chckbxNewCheckBox2);

    textFieldSum1.setEditable(false);

    chckbxNewCheckBox2.addItemListener(handler);

    //textfield2

    add(textFieldSum1);

    //readfile

    BufferedReader reader;

    int counterA = 0;

    int counterB = 0;

    try {

        reader = new BufferedReader(new FileReader("in.txt"));

        int data;

        while ((data = reader.read()) != -1)

        {

            char charA = 'A';

            char charB = 'B';

           // char[] charArray = { 'A', 'B', 'C', 'D', 'E' };

            if (charA == (char) data) 

            {
                counterA++;
            }    

            if (charB == (char) data) 
            {
                counterB++;
            }     
        }
        counter1 = counterB;
        counter = counterA;
        reader.close();
    } 
    catch (IOException ioException) 
    {
        System.err.println("Error Opening File: Terminating");
        System.exit(1);
    }     
}     
  private class CheckBoxHandler implements ItemListener
    {
    @Override
    public void itemStateChanged(ItemEvent e) 
    {
        if(chckbxNewCheckBox1.isSelected())
        {
            checkboxcheck1 = 1;

        }
        else if(chckbxNewCheckBox2.isSelected())
        {
            checkboxcheck2 = 1;
        }
        else if (chckbxNewCheckBox1.isSelected() && chckbxNewCheckBox2.isSelected())
        {
            checkboxcheck1 = 1;
            checkboxcheck2 = 1;
        }
    }
    }

  private class ButtonHandler implements ActionListener
  {
    @Override
    public void actionPerformed(ActionEvent e) 
    {
         if(checkboxcheck1 == 1)
            {
             textFieldSum.setText(String.valueOf(counter));
            }
         else if (checkboxcheck2 == 1)
         {
              textFieldSum1.setText(String.valueOf(counter1));
         }
         else if (checkboxcheck1 == 1 && checkboxcheck2 == 1)
         {
             textFieldSum.setText(String.valueOf(counter));
             textFieldSum1.setText(String.valueOf(counter1));
         }
         else
         {
            checkboxcheck1 = 0;
         }
    }

我想要的只是当我单击两个复选框并单击按钮时，它会在该文本字段中显示结果。或者我点击单个复选框，它仍然在单个文本字段中显示结果。因为我的真实程序中还有20个复选框。基本上，我想要的只是点击任何复选框，然后点击它将显示结果的按钮。

Answer 1

如果你的意思是必须点击两个复选框才能显示按钮，那么可能会这样吗？

private class ButtonHandler implements ActionListener
  {
    @Override
    public void actionPerformed(ActionEvent e) 
    {
         if(checkboxcheck1 == 1 && checkboxcheck2 == 1)
            {
             textFieldSum.setText(String.valueOf(counter));
            }
    }

Answer 2

听起来你想要一个包含两种条件的if语句。和＆amp;＆amp;运营商就是你想要的。

import [something] from scripts

Answer 3

嗯，我真是太傻了。首先复选全部复选框，然后单击。

 private class CheckBoxHandler implements ItemListener
    {
    @Override
    public void itemStateChanged(ItemEvent e) 
    {
        if (chckbxNewCheckBox1.isSelected() && chckbxNewCheckBox2.isSelected())
        {
            checkboxcheck1 = 1;
            checkboxcheck2 = 1;

        }
        else if(chckbxNewCheckBox1.isSelected())
        {
            checkboxcheck1 = 1;

        }
        else if(chckbxNewCheckBox2.isSelected())
        {
            checkboxcheck2 = 1;

        }
    }
    }

  private class ButtonHandler implements ActionListener
  {
    @Override
    public void actionPerformed(ActionEvent e) 
    {
         if (checkboxcheck1 == 1 && checkboxcheck2 == 1)
         {
             textFieldSum.setText(String.valueOf(counter));
             textFieldSum1.setText(String.valueOf(counter1));
         }
         else if(checkboxcheck1 == 1)
            {
             textFieldSum.setText(String.valueOf(counter));
            }
         else if (checkboxcheck2 == 1)
         {
              textFieldSum1.setText(String.valueOf(counter1));
         }
         else
         {
            checkboxcheck1 = 0;
         }
    }   
  }

如何同时显示2 if语句JAVA

3 个答案: