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

// CutPaste.java - program demonstrating String Cut and Paste - ref: Java Examples in a Nutshell by David Flanagan

public class CutPaste extends Frame implements ActionListener { // create frame, be able to close it, pack it, pop it
  private static final long serialVersionUID = 1278345L;
  
  public static void main(String[] args) {
    Frame ourf = new CutPaste();
    ourf.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) { System.exit(0); }
    });
    ourf.pack();
    ourf.setVisible(true); //show();
  }
  
  TextField ourfield;   // Text field with String data
   
  public CutPaste() {  // Constructor
    this.setFont(new Font("Verdana", Font.PLAIN, 14));
    
    // Cut button ...
    Button ourcut = new Button("Cut");
    ourcut.addActionListener(this);
    ourcut.setActionCommand("cut");
    this.add(ourcut, "West");
    
    // Past button ...
    Button ourpaste = new Button("Paste");
    ourpaste.addActionListener(this);
    ourpaste.setActionCommand("paste");
    this.add(ourpaste, "East");
    
    // Text field ...
    ourfield = new TextField();
    this.add(ourfield, "North");
  }
  
  public void actionPerformed(ActionEvent e) {  // click logic
    String ourcmd = e.getActionCommand();
    if (ourcmd.equals("paste")) {
      dopaste();
    } else if (ourcmd.equals("cut")) {
      docut();
    }
  }
  
  public void docut() {  // cut method
    String ours = ourfield.getText();   // text field's string
    
    StringSelection ourss = new StringSelection(ours);  // use StringSelection object 
    
    this.getToolkit().getSystemClipboard().setContents(ourss, ourss);  // contents and owner of clipboard are StringSelection object
  }
  
  public void dopaste() {  // paste method
    Clipboard ourc = this.getToolkit().getSystemClipboard();  // set up Clipboard object
    
    Transferable ourt = ourc.getContents(this);  // Clipboard contents to Transferable object
    
    try {
      String ours = (String)ourt.getTransferData(DataFlavor.stringFlavor);
      ourfield.setText(ours);
    } catch (Exception oure) {
      this.getToolkit().beep();   // oops
      return;
    }
  }
}