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Java: check if the mouse has clicked

i am in trouble with checking if the mouse has clicked with a JFrame. When i use public void mousePressed(MouseEvent e) to print something and i click with the mouse it doesn't print anything. It doesn't gives a error, it just prints nothing out. Here is my code :
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class tuna extends JFrame
{
private JTextArea textArea;
public static void main(String[] args)
{
//Run the program
tuna run = new tuna();
run.setDefaultCloseOperation(3);
run.setSize(1200, 1000);
run.setVisible(true);
}
public tuna()
{
super("Simple JFrame");
//add a simple JScrollPane
textArea = new JTextArea(10,10);
JScrollPane scrollPane = new JScrollPane(textArea);
textArea.setEditable(true);
add(scrollPane);
}
//This doesn't print anything when i am clicking in the JFrame
public void mousePressed(MouseEvent e)
{
if(e.getButton() == MouseEvent.BUTTON1)
{
System.out.println("left");
}
else if(e.getButton() == MouseEvent.BUTTON3)
{
System.out.println("right");
}
}
}
Thank you in advance.

You can make you own Mouse Listener and add it to textArea or another component.
For example like this:
public class tuna extends JFrame
{
private JTextArea textArea;
public static void main(String[] args)
{
//Run the program
tuna run = new tuna();
run.setDefaultCloseOperation(3);
run.setSize(1200, 1000);
run.setVisible(true);
}
public tuna()
{
super("Simple JFrame");
//add a simple JScrollPane
textArea = new JTextArea(10,10);
JScrollPane scrollPane = new JScrollPane(textArea);
textArea.setEditable(true);
textArea.addMouseListener(new CustomListener());
add(scrollPane);
}
//This doesn't print anything when i am clicking in the JFrame
public class CustomListener implements MouseListener {
#Override
public void mouseClicked(MouseEvent mouseEvent) {
if(mouseEvent.getButton() == MouseEvent.BUTTON1)
{
System.out.println("left");
}
else if(mouseEvent.getButton() == MouseEvent.BUTTON3)
{
System.out.println("right");
}
}
#Override
public void mousePressed(MouseEvent mouseEvent) {
}
#Override
public void mouseReleased(MouseEvent mouseEvent) {
}
#Override
public void mouseEntered(MouseEvent mouseEvent) {
}
#Override
public void mouseExited(MouseEvent mouseEvent) {
}
}
}

Well there are few issues, in your concept and source code
First you need a MouseListener, so in your case either you can
create a separate MouseListener or use the current JFrame class
itself, like this
public class Tuna extends JFrame implements MouseListener
Also I would recommend to follow proper naming convention and use Tuna instead of tuna.
Then the element you want to respond on the MouseEvents should be
register with the MouseListener created in first step, in your constructor.
textArea.addMouseListener(this);
Also make sure on what element you want to register your
MouseListener, currently your entire Frame is covered by TextArea,
so registering listener on JFrame won't help, instead add it on
JTextArea
Try using #Override annotation where ever possible, editor shows
appropriate compiler errors then, in your case you just wrote,
public void mousePressed(MouseEvent e)
instead of
#Override
public void mousePressed(MouseEvent e)
As this methods works only if you implement an MouseListener
Refer this link for more understanding,
https://docs.oracle.com/javase/tutorial/uiswing/events/mouselistener.html

MouseListener on button rendered on a JTree Row in Java

I'm blocked with a probelm about Java and the use of JTree:
I want to create a JTree with, node by node, some JButtons components (or Images, I don't mind), like in the following picture. It will be 3 or 4 buttons in the same row. I succeed to do that.
But where I'm blocked is when I want to add a mouselistener on each of this button to manage their tooltip or an action on them.
In fact the JTree component is most of the time used to manage the action on the full node, but not on its inside components.
I did a short code, in comparaison at the real big code I have to work in, to quickly test what I say:
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.event.*;
import java.awt.*;
import java.io.IOException;
import java.net.URL;
public class TreeWithPopup extends JPanel {
DefaultMutableTreeNode root, node1, node2, node3;
public TreeWithPopup() {
MyJTree tree;
root = new DefaultMutableTreeNode("root", true);
node1 = new DefaultMutableTreeNode("node 1", true);
node2 = new DefaultMutableTreeNode("node 2", true);
node3 = new DefaultMutableTreeNode("node 3", true);
root.add(node1);
node1.add(node2);
root.add(node3);
setLayout(new BorderLayout());
tree = new MyJTree(root);
tree.setCellRenderer(new PCellRenderer());
add(new JScrollPane((JTree) tree), "Center");
}
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
public static void main(String s[]) {
JFrame frame = new JFrame("Tree with button");
TreeWithPopup panel = new TreeWithPopup();
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.setForeground(Color.black);
frame.setBackground(Color.lightGray);
frame.getContentPane().add(panel, "Center");
frame.setSize(panel.getPreferredSize());
frame.setVisible(true);
frame.addWindowListener(new WindowCloser());
}
}
class WindowCloser extends WindowAdapter {
public void windowClosing(WindowEvent e) {
Window win = e.getWindow();
win.setVisible(false);
System.exit(0);
}
}
class MyJTree extends JTree implements ActionListener {
MyJTree(DefaultMutableTreeNode dmtn) {
super(dmtn);
addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent arg0) {
System.out.println("JTree.MouseListener");
}
public void mouseEntered(MouseEvent arg0) {
System.out.println("JTree.MouseListener");
}
public void mouseExited(MouseEvent arg0) {
System.out.println("JTree.MouseListener");
}
public void mousePressed(MouseEvent arg0) {
System.out.println("JTree.MouseListener");
}
public void mouseReleased(MouseEvent arg0) {
System.out.println("JTree.MouseListener");
}
});
}
public void actionPerformed(ActionEvent ae) {
System.out.println("MyJTree.ActionPerformed");
}
}
class PCellRenderer extends DefaultTreeCellRenderer {
public Component getTreeCellRendererComponent(JTree ptree, Object pvalue, boolean psel, boolean pexpanded, boolean pleaf, int prow,
boolean phasFocus) {
Box myPanel = new Box(BoxLayout.X_AXIS);
JButton myButton = new JButton("test");
Image imgToUse = null;
Image imgRollOver = null;
try {
URL urlIcon = new URL("file:///C:/1.jpg"); // <===== change their the path to icons
imgToUse = ImageIO.read(urlIcon);
urlIcon = new URL("file:///C:/2.jpg"); // <===== change their the path to icons
imgRollOver = ImageIO.read(urlIcon);
} catch (IOException e) {
e.printStackTrace();
}
myButton.setRolloverIcon(new ImageIcon(imgRollOver));
myButton.setIcon(new ImageIcon(imgToUse));
myButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
System.out.println(" detected on ");
}
});
myButton.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent arg0) {
System.out.println("myButton.MouseListener");
}
public void mouseEntered(MouseEvent arg0) {
System.out.println("myButton.MouseListener");
}
public void mouseExited(MouseEvent arg0) {
System.out.println("myButton.MouseListener");
}
public void mousePressed(MouseEvent arg0) {
System.out.println("myButton.MouseListener");
}
public void mouseReleased(MouseEvent arg0) {
System.out.println("myButton.MouseListener");
}
});
myPanel.add(myButton);
return myPanel;
}
}
You just have to change the icon path or put the two following icons at "c:/"
I also searched to use the x/y position of the row event but I was unable to find the position of my button after rendering.
If anyone can have an idea how to do that, he could be very helpful.
Thanks, at least for read this question ;-)

Tooltip support is actually provided by the TableCellRenderer directly. Your TableCellRenderer is a little muddled. It extends from DefaultTreeCellRenderer but makes no use of any of it's features, instead creating a new Box, JButton and loading icons each time a cell is rendered...
This is going to increase your memory usage a slow you application down...
Instead, try something like...
class PCellRenderer extends Box implements TreeCellRenderer {
private Image imgToUse = null;
private Image imgRollOver = null;
public PCellRenderer() {
super(BoxLayout.X_AXIS);
JButton myButton = new JButton("test");
try {
URL urlIcon = new URL("file:///C:/1.jpg"); // <===== change their the path to icons
imgToUse = ImageIO.read(urlIcon);
urlIcon = new URL("file:///C:/2.jpg"); // <===== change their the path to icons
imgRollOver = ImageIO.read(urlIcon);
} catch (IOException e) {
e.printStackTrace();
}
myButton.setRolloverIcon(new ImageIcon(imgRollOver));
myButton.setIcon(new ImageIcon(imgToUse));
add(myButton);
}
public Component getTreeCellRendererComponent(JTree ptree, Object pvalue, boolean psel, boolean pexpanded, boolean pleaf, int prow,
boolean phasFocus) {
// set the tooltip text here...
// Maybe change the icon...
return this;
}
}
Now, actually doing something...
Renderers are rubber stamps. That are not actually life components. Think of them like photos. You can take a snap shot of your friends, but you can't interact with them...same thing here...
Your idea of a MouseListener on the JTree is a correct one, in fact the JavaDocs actually have a demonstration of this...
public void mousePressed(MouseEvent e) {
int selRow = tree.getRowForLocation(e.getX(), e.getY());
TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());
if(selRow != -1) {
if(e.getClickCount() == 1) {
mySingleClick(selRow, selPath);
}
else if(e.getClickCount() == 2) {
myDoubleClick(selRow, selPath);
}
}
}

Adding Mouse listener to multiple JLabel

for(int k=0;k< dtm.getRowCount();k++) //dtm is object of default table model
{
if(String.valueOf(dtm.getValueAt(k,1)).equalsIgnoreCase("Today") && check==0 )
{
cnt++;
JLabel jp=new JLabel();
panel.add(jp);
panel.setLayout(null);
if(cnt<=12)
{
jp.setBounds(j,500,100,100);
j=j+115;
jp.addMouseListener(this);
}
else
{
j=j-115;
jp.setBounds(j,400,100,100);
}
String b="<html><body text=#FDFA0B>"+String.valueOf(dtm.getValueAt(k,0))+"'s Birthday";
jp.setText(b);
jp.setFont(new java.awt.Font("comicbd",Font.ITALIC+Font.BOLD, 14));
}
}
It will not work mouselister only apply for last placed Label...
I want to apply mouse listener for all label how can I do that ..
please help me ....

Without SSCCE I can tell you that you're adding listener on 3 conditions:
String.valueOf(dtm.getValueAt(k,1)).equalsIgnoreCase("Today")
check == 0
and if(cnt<=12)
Other JLabels (that don't pass these conditions) haven't assigned your listener.
Make sure that you're clicking correct labels.
Or move jp.addMouseListener(this); just after JLabel creation (if you want to add listener to all your JLabels).

You certainly can add the same MouseListener to multiple components - here's an example in it's simplest form:
MouseListener ml = new MouseListener() {
#Override
public void mouseReleased(MouseEvent e) {System.out.println("Released!");}
#Override
public void mousePressed(MouseEvent e) {System.out.println("Pressed!");}
#Override
public void mouseExited(MouseEvent e) {System.out.println("Exited!");}
#Override
public void mouseEntered(MouseEvent e) {System.out.println("Entered!");}
#Override
public void mouseClicked(MouseEvent e) {System.out.println("Clicked!");}
};
JLabel j1 = new JLabel("Label1");
j1.addMouseListener(ml);
JLabel j2 = new JLabel("Label2");
j2.addMouseListener(ml);
BUT according to your code, you're messing with a JTable - and JTable's act differently than you're thinking. The labels you're trying to edit are actually part of a TableCellEditor. The JTable uses the single TableCellEditor (read: single JLabel) to display every cell in the JTable. This is why you're only seeing the Listener applied to the last cell (because that's the only the last cell has a full component any more - the rest are just ghosts of where the component was applied before).
The good news is you can add a MouseListener to the JTable, and obtain information from there:
final JTable table = new JTable();
MouseListener ml = new MouseListener() {
#Override
public void mouseReleased(MouseEvent e) {
System.out.println(table.getModel().getValueAt(table.getSelectedRow(), table.getSelectedColumn()));
}
#Override
public void mousePressed(MouseEvent e) {
System.out.println(table.getModel().getValueAt(table.getSelectedRow(), table.getSelectedColumn()));
}
#Override
public void mouseExited(MouseEvent e) {
System.out.println(table.getModel().getValueAt(table.getSelectedRow(), table.getSelectedColumn()));
}
#Override
public void mouseEntered(MouseEvent e) {
System.out.println(table.getModel().getValueAt(table.getSelectedRow(), table.getSelectedColumn()));
}
#Override
public void mouseClicked(MouseEvent e) {
System.out.println(table.getModel().getValueAt(table.getSelectedRow(), table.getSelectedColumn()));
}
};
table.addMouseListener(ml);

One Option is to add another inner class:
class MListener extends MouseAdapter{
public void mouseReleased(MouseEvent e) {}
//other mouse evetns
}
then rather then:
jp.addmousListener(this);
do:
jp.addMouseListener(new MListener());

Making a mouse button trigger a class event

I am really struggling with making a program that has buttons on it and when a button is clicked, it calls a class to work. I have only been using Java for about 10 weeks now and I get the basics but I have not found any place that gives me an understanding of what I want to do here.
I have tried
public void mouseEntered(MouseEvent e) {
if (e.getButton()== MouseEvent.BUTTON3){
Object triangle;
Frame.class.getClass();
}
}
I have also tried
panel.addMouseListener(new MouseAdapter() {
if (e.getButton()== MouseEvent.BUTTON1) {
Frame.class.getClass(circle); }
Either way I have tried it I usually get an error unable to find object or The method getClass() in the type Objectis not applicable for the arguments (JButton).
Can anyone please help me try to figure out what I am doing wrong?
Thank you.

public class MainFrame extends JFrame {
private JButton button = new JButton("Run AnotherClass");
MainFrame() {
super();
this.setTitle("Demo App");
this.setSize(200,200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLayout(new FlowLayout());
this.add(button);
button.addActionListener(new ButtonHandler());
}
public class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
new AnotherClass();
}
}
public static void main(String[] args) {
new MainFrame().setVisible(true);
}
}
public class AnotherClass {
public AnotherClass() {
JOptionPane.showMessageDialog(null, "AnotherClass is in operation");
}
}

JPopupMenu Behavior OSX 10.6.7

My problem is when I right click on the JFrame in the example below, the JPopupMenu shows up but if I click anywhere outside the JFrame, the menu does not disappear. I have to click somewhere on the JFrame to get rid of it which is not the expected behavior. Here are the steps to reproduce:
Run the window class from Eclipse (JFrame appears)
Click into the Eclipse workspace (JFrame loses focus and is hidden behind eclipse)
Minimize Eclipse (JFrame appears)
Go with your mouse over JFrame and make a right click (Popup appears)
Click somewhere (Not into JFrame or Popup). The Popup will not disappear
I'm running OS X 10.6.7 and Java full version 1.6.0_24-b07-334
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class test
{
static class window extends JFrame implements MouseListener,
MouseMotionListener
{
JPopupMenu popMenu;
JPanel panel = new JPanel();
Point location;
MouseEvent pressed;
public window()
{
addMouseListener(this);
addMouseMotionListener(this);
JLabel label = new JLabel("JFrame", JLabel.CENTER);
initPopMenu();
add(label);
setUndecorated(true);
setVisible(true);
// setAlwaysOnTop(true);
setLocationRelativeTo(null);
pack();
}
public void initPopMenu()
{
popMenu = new JPopupMenu();
JMenuItem item;
item = new JMenuItem("Title");
item.setEnabled(false);
popMenu.add(item);
popMenu.addSeparator();
item = new JMenuItem("Item One");
popMenu.add(item);
item = new JMenuItem("Item 2");
popMenu.add(item);
item = new JMenuItem("Item 3");
popMenu.add(item);
}
public void mousePressed(MouseEvent e)
{
pressed = e;
int nModifier = e.getModifiers();
if (((nModifier & InputEvent.BUTTON2_MASK) != 0)
|| ((nModifier & InputEvent.BUTTON3_MASK) != 0))
popMenu.show( this, e.getX(), e.getY() );
}
public void mouseClicked(MouseEvent e)
{
}
public void mouseReleased(MouseEvent e)
{
}
public void mouseDragged(MouseEvent me)
{
}
public void mouseMoved(MouseEvent e)
{
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
}
public static void main(String[] args)
{
window dw = new window();
}
}

you can add a windowFocusListener, hide the menu when window lost focus
this.addWindowFocusListener(new WindowFocusListener() {
#Override
public void windowLostFocus(WindowEvent e) {
if(popMenu != null){
popMenu.setVisible(false);
}
}
#Override
public void windowGainedFocus(WindowEvent e) {
//System.out.println(e);
}
});