看看PromptSupport
在SwingLabs SwingX Library
對於實例
![Prompt fields](https://i.stack.imgur.com/FRF7b.png)
當字段有焦點, 「提示」 將被隱藏,但你可以控制這一點,直到用戶鍵入內容或獲得焦點時突出顯示。
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import org.jdesktop.swingx.prompt.BuddySupport;
import org.jdesktop.swingx.prompt.PromptSupport;
public class PromptSupportTest {
public static void main(String[] args) {
new PromptSupportTest();
}
public PromptSupportTest() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
JTextField firstName = new JTextField(10);
PromptSupport.setPrompt("First Name", firstName);
PromptSupport.setFocusBehavior(PromptSupport.FocusBehavior.HIDE_PROMPT, firstName);
JTextField lastName = new JTextField(10);
PromptSupport.setPrompt("Last Name", lastName);
PromptSupport.setFocusBehavior(PromptSupport.FocusBehavior.HIDE_PROMPT, lastName);
JTextField picture = new JTextField(10);
PromptSupport.setPrompt("Picture", picture);
PromptSupport.setFocusBehavior(PromptSupport.FocusBehavior.HIDE_PROMPT, picture);
JButton browse = new JButton("...");
browse.setMargin(new Insets(0, 0, 0, 0));
browse.setContentAreaFilled(false);
browse.setFocusPainted(false);
browse.setFocusable(false);
browse.setOpaque(false);
// Add action listener to brose button to show JFileChooser...
BuddySupport.addRight(browse, picture);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
add(firstName, gbc);
add(lastName, gbc);
add(picture, gbc);
gbc.anchor = GridBagConstraints.CENTER;
add(new JButton("Ok"), gbc);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
}
我也加入BuddySupport
其中一個例子是一樣的API,它可以讓你的「好友」與文本組件另一個組件的一部分。在這裏,我已經做了經典的「文件瀏覽器」的組合,但我的「搜索」風格的領域,如這一切的時候...
+1我只是要評論,舉一個例子:D好回答:)。其實他也可能對'BuddySupport'感興趣。 – nachokk
@nachokk天啊!我愛'BuddySupport'! – MadProgrammer
謝謝,但我不知道如何下載並安裝庫PromptSupport。我的意思是:我必須下載哪個jar文件?和我必須把這個文件?謝謝 –