How do I create a right click context menu in Java Swing

Question

I m currently creating a right-click context menu by instantiating a new JMenu on right click and setting its location to that of the mouse s position    Is there a better way

User · Answer

There s a section on Bringing Up a Popup Menu in the How to Use Menus article of The Java Tutorials which explains how to use the JPopupMenu class    The example code in the tutorial shows how to add MouseListeners to the components which should display a pop-up menu  and displays the menu accordingly    The method you describe is fairly similar to the way the tutorial presents the way to show a pop-up menu on a component

User · Answer

This question is a bit old - as are the answers  and the tutorial as well   The current api for setting a popupMenu in Swing is  myComponent setComponentPopupMenu myPopupMenu     This way it will be shown automagically  both for mouse and keyboard triggers  the latter depends on LAF   Plus  it supports re-using the same popup across a container s children  To enable that feature   myChild setInheritsPopupMenu true

User · Answer

The following code implements a default context menu known from Windows with copy  cut  paste  select all  undo and redo functions  It also works on Linux and Mac OS X   import javax swing    import javax swing text JTextComponent  import javax swing undo UndoManager  import java awt    import java awt datatransfer Clipboard  import java awt datatransfer DataFlavor  import java awt event KeyAdapter  import java awt event KeyEvent  import java awt event MouseAdapter  import java awt event MouseEvent   public class DefaultContextMenu extends JPopupMenu       private Clipboard clipboard       private UndoManager undoManager       private JMenuItem undo      private JMenuItem redo      private JMenuItem cut      private JMenuItem copy      private JMenuItem paste      private JMenuItem delete      private JMenuItem selectAll       private JTextComponent textComponent       public DefaultContextMenu                 undoManager   new UndoManager            clipboard   Toolkit getDefaultToolkit   getSystemClipboard             addPopupMenuItems               private void addPopupMenuItems                 undo   new JMenuItem  Undo            undo setEnabled false           undo setAccelerator KeyStroke getKeyStroke KeyEvent VK Z  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              undo addActionListener event - gt  undoManager undo             add undo            redo   new JMenuItem  Redo            redo setEnabled false           redo setAccelerator KeyStroke getKeyStroke KeyEvent VK Y  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              redo addActionListener event - gt  undoManager redo             add redo            add new JSeparator              cut   new JMenuItem  Cut            cut setEnabled false           cut setAccelerator KeyStroke getKeyStroke KeyEvent VK X  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              cut addActionListener event - gt  textComponent cut             add cut            copy   new JMenuItem  Copy            copy setEnabled false           copy setAccelerator KeyStroke getKeyStroke KeyEvent VK C  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              copy addActionListener event - gt  textComponent copy             add copy            paste   new JMenuItem  Paste            paste setEnabled false           paste setAccelerator KeyStroke getKeyStroke KeyEvent VK V  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              paste addActionListener event - gt  textComponent paste             add paste            delete   new JMenuItem  Delete            delete setEnabled false           delete setAccelerator KeyStroke getKeyStroke KeyEvent VK DELETE  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              delete addActionListener event - gt  textComponent replaceSelection               add delete            add new JSeparator              selectAll   new JMenuItem  Select All            selectAll setEnabled false           selectAll setAccelerator KeyStroke getKeyStroke KeyEvent VK A  Toolkit getDefaultToolkit   getMenuShortcutKeyMask              selectAll addActionListener event - gt  textComponent selectAll             add selectAll              private void addTo JTextComponent textComponent                textComponent addKeyListener new KeyAdapter                          Override             public void keyPressed KeyEvent pressedEvent                                if   pressedEvent getKeyCode      KeyEvent VK Z                           amp  amp    pressedEvent getModifiersEx    amp  Toolkit getDefaultToolkit   getMenuShortcutKeyMask       0                                         if  undoManager canUndo                                                  undoManager undo                                                             if   pressedEvent getKeyCode      KeyEvent VK Y                           amp  amp    pressedEvent getModifiersEx    amp  Toolkit getDefaultToolkit   getMenuShortcutKeyMask       0                                         if  undoManager canRedo                                                  undoManager redo                                                                               textComponent addMouseListener new MouseAdapter                          Override             public void mousePressed MouseEvent releasedEvent                                handleContextMenu releasedEvent                               Override             public void mouseReleased MouseEvent releasedEvent                                handleContextMenu releasedEvent                                      textComponent getDocument   addUndoableEditListener event - gt  undoManager addEdit event getEdit                 private void handleContextMenu MouseEvent releasedEvent                if  releasedEvent getButton      MouseEvent BUTTON3                        processClick releasedEvent                        private void processClick MouseEvent event                textComponent    JTextComponent  event getSource            textComponent requestFocus             boolean enableUndo   undoManager canUndo            boolean enableRedo   undoManager canRedo            boolean enableCut   false          boolean enableCopy   false          boolean enablePaste   false          boolean enableDelete   false          boolean enableSelectAll   false           String selectedText   textComponent getSelectedText            String text   textComponent getText             if  text    null                        if  text length    gt  0                                enableSelectAll   true                                   if  selectedText    null                        if  selectedText length    gt  0                                enableCut   true                  enableCopy   true                  enableDelete   true                                   if  clipboard isDataFlavorAvailable DataFlavor stringFlavor   amp  amp  textComponent isEnabled                          enablePaste   true                     undo setEnabled enableUndo           redo setEnabled enableRedo           cut setEnabled enableCut           copy setEnabled enableCopy           paste setEnabled enablePaste           delete setEnabled enableDelete           selectAll setEnabled enableSelectAll               Shows the popup menu         show textComponent  event getX    event getY                public static void addDefaultContextMenu JTextComponent component                DefaultContextMenu defaultContextMenu   new DefaultContextMenu            defaultContextMenu addTo component             Usage   JTextArea textArea   new JTextArea    DefaultContextMenu addDefaultContextMenu textArea     Now the textArea will have a context menu when it is right-clicked on

User · Answer

You are probably manually calling setVisible true  on the menu   That can cause some nasty buggy behavior in the menu     The show Component  int x  int x  method handles all of the things you need to happen   Highlighting things on mouseover and closing the popup when necessary  where using setVisible true  just shows the menu without adding any additional behavior   To make a right click popup menu simply create a JPopupMenu   class PopUpDemo extends JPopupMenu       JMenuItem anItem      public PopUpDemo             anItem   new JMenuItem  Click Me             add anItem             Then  all you need to do is add a custom MouseListener to the components you would like the menu to popup for   class PopClickListener extends MouseAdapter       public void mousePressed MouseEvent e            if  e isPopupTrigger                doPop e              public void mouseReleased MouseEvent e            if  e isPopupTrigger                doPop e              private void doPop MouseEvent e            PopUpDemo menu   new PopUpDemo            menu show e getComponent    e getX    e getY                 Then on your component s  component addMouseListener new PopClickListener       Of course  the tutorials have a slightly more in-depth explanation   Note  If you notice that the popup menu is appearing way off from where the user clicked  try using the e getXOnScreen   and e getYOnScreen   methods for the x and y coordinates

User · Answer

I will correct usage for that method that  BullyWillPlaza suggested  Reason is that when I try to add add textArea to only contextMenu it s not visible  and if i add it to both to contextMenu and some panel it ecounters  Different parent double association if i try to switch to Design editor    TexetObjcet addMouseListener new MouseAdapter              Override         public void mouseClicked MouseEvent e                if  SwingUtilities isRightMouseButton e                    contextmenu add TexetObjcet                   contextmenu show TexetObjcet  0  0                                      Make mouse listener like this for text object you need to have popup on  What this will do is when you right click on your text object it will then add that popup and display it  This way you don t encounter that error  Solution that  BullyWillPlaza made is very good  rich and fast to implement in your program so you should try it our see how you like it

[java] How do I create a right click context menu in Java Swing?

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