How to Set Focus on JTextField?

user_623107 0
Viewed 150111

I make my game run without mouse so using pointer is not a choice. High Score menu will show when player lose.

this is my code

    highScore=new MyTextField("Your Name");
    highScore.addKeyListener(this);
    highScore.setFont(font);
    highScore.requestFocusInWindow();

I have tried 

highScore.setFocusable(true);
highScore.requestFocusInWindow();
highScore.requestFocus(true);
highScore.requestFocus();

but still not gained focus on my JTextField.

How to focus it?

jtextfield setfocus swing java
10 Answers
public void actionPerformed(ActionEvent arg0)
{
    if (arg0.getSource()==clearButton)
    {
        enterText.setText(null);
        enterText.grabFocus();  //Places flashing cursor on text box        
    }       
}
user_30008400

It was not working for me when tried to use:

JOptionPane.showConfirmDialog(...)

But - I found a solution ! Very primitive, but works.

Just jump to the field by java.awt.Robot using key "Tab". For example:

Robot robot = new Robot();
robot.keyPress(KeyEvent.VK_TAB);
robot.delay(100);
robot.keyRelease(KeyEvent.VK_TAB);

If you should press multiple times on "Tab" to get your Component you can use below method:

GUIUtils.pressTab(3);

Definition:

public static void pressTab(int amountOfClickes)
{
    SwingUtilities.invokeLater(new Runnable()
    {
        public void run()
        {
            try
            {
                Robot robot = new Robot();
                int i = amountOfClickes;
                while (i-- > 0)
                {
                    robot.keyPress(KeyEvent.VK_TAB);
                    robot.delay(100);
                    robot.keyRelease(KeyEvent.VK_TAB);
                }
            }
            catch (AWTException e)
            {
                System.out.println("Failed to use Robot, got exception: " + e.getMessage());
            }
        }
    });
}

If your Component location is dynamic, you can run over the while loop without limitation, but add some focus listener on the component, to stop the loop once arrived to it.

user_61305010

While yourTextField.requestFocus() is A solution, it is not the best since in the official Java documentation this is discourage as the method requestFocus() is platform dependent.

The documentation says:

Note that the use of this method is discouraged because its behavior is platform dependent. Instead we recommend the use of requestFocusInWindow().

Use yourJTextField.requestFocusInWindow() instead.

user_20585470

How about put jTextField.requestFocusInWindow(); into jTextField FocusLost event? Works for me have 5 controls on JPanel Soon as click on MessageBox, focus lost on jTextField. Used all the suggested codes but no luck Only above method works my case.

user_135534570
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