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import javax.swing.JTextField;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;
class JTextFieldLimit extends PlainDocument {
private int limit;
JTextFieldLimit(int limit) {
super();
this.limit = limit;
}
public void insertString(int offset, String str, AttributeSet attr)
throws BadLocationException {
if (str == null)
return;
if ((getLength() + str.length()) <= limit) {
super.insertString(offset, str, attr);
}
}
}
public class Main {
public static void main(String[] argv) {
JTextField textfield1 = new JTextField(15);
textfield1.setDocument(new JTextFieldLimit(10));
}
}
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