为什么我的JRadioButtons标签是“......”而不是我想要的文字？

Question

我不知道为什么每个按钮都没有显示我想要的文字，以及为什么显示“...”

ButtonGroup operations = new ButtonGroup(); 

 JRadioButton[] buttons = new JRadioButton[2]; 

 String[] buttonLabels = {"Male", "Female"}; 

 for (int i=0; i<2; i++) { 
     buttons[i] = new JRadioButton(buttonLabels[i], true); 

     buttons[i].setLocation(400 + (i * 50) , 170); 
     buttons[i].setSize(35, 30); 

     add(buttons[i]); 
     operations.add(buttons[i]); 


 }

我希望按钮[0]说男性，按钮1说女性

Answer 1

当没有足够的空间显示整个文本时会发生这种情况。您可以尝试将它们放在彼此之下或稍微拉伸宽度。

Answer 2

您的主要问题是您使用的是null布局和绝对定位。如果您使用体面的布局管理器，他们会为您处理这个问题。此外，您可以更轻松地维护在 所有 平台和屏幕分辨率上看起来不错的GUI。

如，

import java.awt.*;
import javax.swing.*;

@SuppressWarnings("serial")
public class LayoutEg extends JPanel {

   public LayoutEg() {

      setBorder(BorderFactory.createTitledBorder("Personal Information"));
      setLayout(new GridBagLayout());

      addLabelWithComponent("First Name:", new JTextField(10), 0, 0);
      addLabelWithComponent("Last Name:", new JTextField(10), 0, 1);
      addLabelWithComponent("City:", new JTextField(10), 0, 2);
      addLabelWithComponent("Street:", new JTextField(10), 0, 3);
      addLabelWithComponent("Province:", 
            new JComboBox<>(new String[] { "Foo", "Bar" }), 0, 4);
      addLabelWithComponent("Home Phone:", new JTextField(10), 2, 0);
      addLabelWithComponent("Cell Phone:", new JTextField(10), 2, 1);
      addLabelWithComponent("Email Address:", new JTextField(10), 2, 2);
      addLabelWithComponent("Age", new JSpinner(
            new SpinnerNumberModel(18, 17, 100, 1)), 2, 3);
      JPanel radioPanel = new JPanel(new GridLayout(1, 0));
      radioPanel.add(new JRadioButton("Male"));
      radioPanel.add(new JRadioButton("Female"));
      addLabelWithComponent("Gender:", radioPanel, 2, 4);

   }

   private void addLabelWithComponent(String text, JComponent component, int x, int y) {
      addLabel(new JLabel(text), x, y);
      addComponent(component, x + 1, y);
   }

   private void addComponent(JComponent component, int x, int y) {
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = x;
      gbc.gridy = y;
      gbc.weightx = 1.0;
      gbc.weighty = 1.0;
      gbc.anchor = GridBagConstraints.WEST;
      gbc.fill = GridBagConstraints.HORIZONTAL;
      gbc.insets = new Insets(5, 5, 5, 5);
      add(component, gbc);
   }

   private void addLabel(JComponent component, int x, int y) {
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = x;
      gbc.gridy = y;
      gbc.weightx = 1.0;
      gbc.weighty = 1.0;
      gbc.anchor = GridBagConstraints.WEST;
      gbc.fill = GridBagConstraints.BOTH;
      int left = x == 2 ? 35 : 5;
      gbc.insets = new Insets(5, left, 5, 5);
      add(component, gbc);
   }

   private static void createAndShowGui() {
      LayoutEg mainPanel = new LayoutEg();

      JFrame frame = new JFrame("LayoutEg");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(mainPanel);
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

如果你只是让你的JRadioButtons更大，然后在另一个平台上运行这个应用程序，名称就会消失，那么呢？这就是布局的用途。

例如，以上显示为：

Answer 3

您需要增加JRadioButton的宽度。

Answer 4

原来我必须使.SetSize更大