How to Check Whether a Textfield in Java Has the Cursor in It
When a user clicks on a text box, the Java language places the cursor in the text box and the text box gains focus on the form. Setting an element's focus and determining the focus element are two functions available to Java programmers. Use the "requestFocusInWindow" function to determine the text box element that has the cursor placed in the box.
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Instructions
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Right-click the Java source code file you want to edit. Click "Open With" and choose your Java editor in the list of programs.
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Double-click the form you want to edit in the editor. Double-click the text box control on the form to open the Java source code.
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Type the following code to determine if the text box has the focus:
textbox1.requestFocusInWindow();
If the text box has focus, the text box name returns; if another element has focus, the element's name returns.
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