【发布时间】：2015-01-24 05:41:06
【问题描述】：
我一直在为我的程序设计一个菜单，但我在使用 JLabels 时遇到了一些问题，因为我对它们不是很有经验。
我设置了 JFrame，按钮和 JEditorPanes/JTextField 的布局很好，但是当我尝试将 JLabels 添加到前 2 个 JEditorPanes 时，它们会显示在左侧。
任何帮助将不胜感激，谢谢:)
public class WindowWin extends JFrame implements ActionListener {
JPanel[] row = new JPanel[4];
JButton[] button = new JButton[4];
String[] buttonString = { "Copy to Clipboard", "Go", "Back", "Info" };
JLabel[] label = new JLabel[4];
String[] labelString = {"Label1",
"Label2",
"Label3",
""
};
int[] dimW = { 400, 200, 65 };
int[] dimH = { 40, 100 };
Dimension keyDim = new Dimension(dimW[0], dimH[0]);
Dimension displayDimension = new Dimension(dimW[0], dimH[1]);
Dimension butDim = new Dimension(dimW[1], dimH[0]);
Dimension infoDim = new Dimension(dimW[2], dimH[0]);
JEditorPane display = new JEditorPane();
Font font = new Font("Times new Roman", Font.PLAIN, 14);
JTextField keyIn = new JTextField(24);
JEditorPane msgIn = new JEditorPane();
JScrollPane scrollerD = new JScrollPane(display,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
JScrollPane scrollerM = new JScrollPane(msgIn,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
public static void main(String[] args) {
WindowWin c = new WindowWin();
}
WindowWin() {
super("Test");
setDefaultCloseOperation(EXIT_ON_CLOSE);
GridBagLayout grid = new GridBagLayout();
setLayout(grid);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.fill = GridBagConstraints.HORIZONTAL;
FlowLayout f1 = new FlowLayout(FlowLayout.CENTER);
FlowLayout f2 = new FlowLayout(FlowLayout.CENTER, 1, 1);
for (int i = 0; i < 4; i++)
row[i] = new JPanel();
row[0].setLayout(f1);
for (int i = 1; i < 4; i++) {
row[i].setLayout(f2);
}
for (int i = 0; i < 4; i++) {
button[i] = new JButton();
button[i].setText(buttonString[i]);
button[i].setFont(font);
button[i].addActionListener(this);
}
for(int i = 0; i < 2; i++)
{
label[i] = new JLabel(labelString[i]);
row[i].add(label[i]);
label[i].setVerticalAlignment(JLabel.TOP);
label[i].setHorizontalAlignment(JLabel.CENTER);
label[i].setText(labelString[i]);
}
display.setFont(font);
display.setEditable(false);
display.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
display.setPreferredSize(displayDimension);
keyIn.setFont(font);
keyIn.setEditable(true);
keyIn.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
keyIn.setPreferredSize(keyDim);
msgIn.setFont(font);
msgIn.setEditable(true);
msgIn.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
msgIn.setPreferredSize(displayDimension);
for (int i = 0; i < 2; i++)
button[i].setPreferredSize(butDim);
for (int i = 2; i < 4; i++)
button[i].setPreferredSize(infoDim);
row[0].add(scrollerD);
add(row[0], gbc);
row[1].add(scrollerM);
add(row[1], gbc);
row[2].add(button[0]);
row[2].add(button[1]);
add(row[2], gbc);
row[3].add(button[2]);
row[3].add(keyIn);
row[3].add(button[3]);
add(row[3], gbc);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
/*
* public final void setDesign() { try { UIManager.setLookAndFeel(
* "com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"); } catch(Exception e)
* { } }
*/
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == button[0]) {
}
if (ae.getSource() == button[1]) {
display.setText("Test");
}
}
public void clear() {
try {
display.setText("");
} catch (NullPointerException e) {
}
}
public void outd() {
display.setText("");
}
}
【问题讨论】：
-
您考虑过使用
TitledBorder吗？