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I tried with the following code using KeyTyped Event like,

private void tfBannerKeyTyped(java.awt.event.KeyEvent evt) {
if(tfBanner.getText().length() > 10)
...

I dont want to move the cursor.I tried with
evt.dispatchEvent(evt);

But its throwing some exception.

I have one jtextarea component in my GUI.I have to limit the maximum row size is 5.What i have to do?