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Change the title text of JMenuItem upon click?

I am adding a JMenuItem (Show History) that will toggle the appearance of a JPanel upon click. But after doing so, I want to change the title of that menu item to state the opposite action (Hide History). Is there a way to change just the text for that menu item, or must I remove the old JMenuItem and add a new one?
JMenuItem history = new JMenuItem("Show History");
history.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//code here to show the history
//history.changeText("Hide History") OR viewMenu.remove(history) and create/add new one
}
});
viewMenu.add(history);

So this is what you do:
history.setText("Hide History");
And make history final.

Right click popup menu in Processing

I am a beginner in both Java and Processing. I am trying to create a right click popup menu that will be displayed inside a processing jPanel. Part of the code I m using is displayed bellow, belongs to the class that extends PAplet. Initially, popup menu is displayed properly when right mouse buttonis pressed, but after using some other elements of the GUI, it doesnt appear on the screen anymore.
How to fix this? Shall I create the popup menu inside steup() method? Or elsewhere?
Thanks.
private JPopupMenu menu = new JPopupMenu();
private JMenuItem edgeFrom = new JMenuItem("Edge From");
private JMenuItem edgeTo = new JMenuItem("Edge To");
#Override
public void setup() {
size(desiredheight,desiredwidth);
background(255);
PopupActionHandler handler = new PopupActionHandler();
edgeFrom.addActionListener(handler);
edgeTo.addActionListener(handler);
menu.add(edgeFrom);
menu.add(edgeTo);
addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent evt) {
if (evt.isPopupTrigger()) {
menu.show(evt.getComponent(), evt.getX(), evt.getY());
}
}
});
}

Use the below reference link for JPopupMenu
http://www.java2s.com/Code/Java/Swing-JFC/AsimpleexampleofJPopupMenu.htm

How to link a JMenuItem to a JButton

Let's say I have a JMenuItem with a text inside "Exit", and a JButton with the text "Exit",
the command which JButton will use is System.exit(0), of course using Action Listener, Ok i Know, I can put the same codes when clicking on the JMenuItem, but isn't there a way, that when I click on the JMenuItem, the JButton is clicked so then the following commands are executed (JButton commands)?

What you can do is create an Action object, and use that for both your JButton and your JMenuItem.
Action exit = new AbstractAction() {
private static final long serialVersionUID = -2581717261367873054L;
#Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
};
exit.putValue(Action.NAME, "Exit");
exit.putValue(Action.MNEMONIC_KEY, KeyEvent.VK_X);
JButton exitButton = new JButton(exit);
JMenuItem exitItem = new JMenuItem(exit);

A good way to do this is to set the same ActionListener to both components. Like this:
JButton button = new JButton ("Exit");
JMenuItem item = new JMenuItem ("Exit");
ActionListener exitaction = new ActionListener ()
{
public void actionPerformed (ActionEvent e)
{
System.exit (0);
}
};
button.addActionListener (exitaction);
item.addActionListener (exitaction);
However, I would recommend against using System.exit (0). The better way of closing the program (which I assume is basically a JFrame) is by setting
frame.setDefaultCloseOperation (JFrame.DISPOSE_ON_CLOSE)
(where frame is the window of the program)
and calling frame.dispose () in the ActionListener.

I consider the best way to do this is to register the same ActionListener instance in the event listeners of both JMenuItem and JButton, it's like using the old Command design pattern.
I would not recommend trying to trick the events 'engine' like making the JMenuItem fire the event related to the pressing of the JButton, since that is not what's happening but what you seem to want is to reuse both actions to 2 distinct events.

You can try to save the button as a class field
private JButton button;
and insert in the click event handler of the menu item the code
button.doClick();
but the solution of SoboLAN is more elegant.

Toggle a component's 'enable' property according to a radio button in netbeans

I have two radio buttons in a button group and in the same panel I have a text box and a button. I want to enable the text box and the button only when the second button is selected and be disabled when the other radio button is selected. I've tried this and it didn't work.
private void radio_button2ActionPerformed(java.awt.event.ActionEvent evt) {
if(buttonGroup1.getSelection()==radio_button2)
{
button.setEnabled(true);
textbox.setEnabled(true);
}
Where have I gone wrong?

You don't want to use an ActionListener because the event only fires when you click the button. Instead you can use an ItemListener so an event is generated when the item is selected or deselected (by clicking the other radio button). Something like:
radioButton2.addItemListener( new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
JRadioButton button = (JRadioButton)e.getSource();
component1.setEnabled( button.isSelected() );
component2.setEnabled( button.isSelected() );
}
});

How to execute button by clicking on another button java?

menuBar = new JMenuBar();
// File Menu
JMenu fileMenu = new JMenu("File");
menuBar.add(fileMenu);
// File->New
JMenuItem newMenuItem = new JMenuItem("New");
frame.setJMenuBar(menuBar);
newMenuItem.addMouseListener(new MouseAdapter() {
#Override
public void mousePressed(MouseEvent arg0) {
btnExample.setText("Clicked");
btnExample.doClick();
//---------->SOME HOW TO EXECUTE btnExample<---------//
}
});
fileMenu.add(newMenuItem);
final JButton btnExample = new JButton("SD");
frame.getContentPane().add(btnExample, "cell 4 0,growx,aligny top");
btnExample.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent arg0) {
spinnerForVar.setValue(4);//default value for spinner
spinnerForFunc.setValue(4);//default value for spinner
...
}
});
Hello! I hope someone can help me. Here it is the problem: I have Menu item "New" and have button btnExample. I want the following: When i click on "File->New" it executes btnExample. My code is able only to change the button title and show visual affect of clicking. But how can I actually execute it?

I have only one advice - don't do that. Don't bind GUI components in this way.
If you want two components to execute the same operation, simply pack this operation in a method and call the method from both components.
Also, use ActionListener - are you sure the user is going to press it using mouse and not keyboard? what if you add shortcuts to those buttons/components?

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
//My button to click on it
jButton1ActionPerformed(evt);//this is the call for the other button to execut it
}

You should not be using a MouseListener for this.
You should be using Actions. Then you can add the Action to both the JButton and the JMemuItem.
Read the section from the Swing tutorial on How to Use Actions.

Amazing, I found my solution in your codes!
btnExample.doClick();
This did the job for me