Java by API/java.awt.datatransfer/StringSelection

new StringSelection(String data)

 
// : c14:CutAndPaste.java
// Using the clipboard.
// From "Thinking in Java, 3rd ed." (c) Bruce Eckel 2002
// www.BruceEckel.ru. See copyright notice in CopyRight.txt.
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 Main 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 Main() {
    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(Main.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 Main(), 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);
  }
} ///:~