Java tutorial
import java.awt.BorderLayout; import javax.swing.Action; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JScrollPane; import javax.swing.JSplitPane; import javax.swing.JTextArea; import javax.swing.text.DefaultEditorKit; public class Main { public static void main(String args[]) { JFrame frame = new JFrame("Use TextAction"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JTextArea leftArea = new JTextArea(); final JTextArea rightArea = new JTextArea(); JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, new JScrollPane(leftArea), new JScrollPane(rightArea)); splitPane.setDividerLocation(.5); JMenuBar menuBar = new JMenuBar(); frame.setJMenuBar(menuBar); JMenu menu = new JMenu("Options"); menuBar.add(menu); JMenuItem menuItem; Action readAction = leftArea.getActionMap().get(DefaultEditorKit.readOnlyAction); menuItem = menu.add(readAction); menuItem.setText("Make read-only"); Action writeAction = leftArea.getActionMap().get(DefaultEditorKit.writableAction); menuItem = menu.add(writeAction); menuItem.setText("Make writable"); menu.addSeparator(); Action cutAction = leftArea.getActionMap().get(DefaultEditorKit.cutAction); menuItem = menu.add(cutAction); menuItem.setText("Cut"); Action copyAction = leftArea.getActionMap().get(DefaultEditorKit.copyAction); menuItem = menu.add(copyAction); menuItem.setText("Copy"); Action pasteAction = leftArea.getActionMap().get(DefaultEditorKit.pasteAction); menuItem = menu.add(pasteAction); menuItem.setText("Paste"); frame.add(splitPane, BorderLayout.CENTER); frame.setSize(400, 250); frame.setVisible(true); } }