Swing怎么实现点击一个按钮,自动复制jtextarea里面的文本?

[hmilyld]

RT
点击一个按钮后,就把jtextarea里面的文本信息复制一下,相当于选中后CTRL+C?

[boby]

给按钮加个ActionListener，再加一个String，比如String copyText ，
点按钮后copyText = JTextArea.getText();

[hmilyld]

不是这个意思,
这样是得到那个文本,
我想要的是,点击一个 复制 按钮,
然后到其他地方,比如说自己新建个记事本之类的就能粘贴了这样的.

[ukeychen]

up

[boby]

你说的剪贴板功能啊，看看Clipboard类把，顺便给你个例子:

import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextArea;

public class CutAndPaste extends JFrame {
private JMenuBar mb = new JMenuBar();

private JMenu edit = new JMenu("Edit");

private JMenuItem cut = new JMenuItem("Cut"), copy = new JMenuItem("Copy"),
paste = new JMenuItem("Paste");

private JTextArea text = new JTextArea(20, 20);

private Clipboard clipbd = getToolkit().getSystemClipboard();

public CutAndPaste() {
cut.addActionListener(new CutL());
copy.addActionListener(new CopyL());
paste.addActionListener(new PasteL());
edit.add(cut);
edit.add(copy);
edit.add(paste);
mb.add(edit);
setJMenuBar(mb);
getContentPane().add(text);
}

class CopyL implements ActionListener {
public void actionPerformed(ActionEvent e) {
String selection = text.getSelectedText();
if (selection == null)
return;
StringSelection clipString = new StringSelection(selection);
clipbd.setContents(clipString, clipString);
}
}

class CutL implements ActionListener {
public void actionPerformed(ActionEvent e) {
String selection = text.getSelectedText();
if (selection == null)
return;
StringSelection clipString = new StringSelection(selection);
clipbd.setContents(clipString, clipString);
text.replaceRange("", text.getSelectionStart(), text
.getSelectionEnd());
}
}

class PasteL implements ActionListener {
public void actionPerformed(ActionEvent e) {
Transferable clipData = clipbd.getContents(CutAndPaste.this);
try {
String clipString = (String) clipData
.getTransferData(DataFlavor.stringFlavor);
text.replaceRange(clipString, text.getSelectionStart(), text
.getSelectionEnd());
} catch (Exception ex) {
System.err.println("Not String flavor");
}
}
}

public static void main(String[] args) {
run(new CutAndPaste(), 300, 200);
}

public static void run(JFrame frame, int width, int height) {
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(width, height);
frame.setVisible(true);
}
}

[hmilyld]

谢了楼下的.:)
搞定.