FULL PRODUCT VERSION :
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
If you enter a very large string(50000) characters, then press the Home key, the GUI becomes unresponsive.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the attached code
type a very big string(50,000 charachters) in the first text field
press home key
Now the GUI remains frozen for some time.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The GUI should not freeze.
ACTUAL -
The GUi is frozen

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class JTextFieldBug{

public static void main(String[] args){

JTextField f1 = new JTextField(30);
JTextField f2 = new JTextField(30);
JTextField f3 = new JTextField(30);
JTextField f4 = new JTextField(30);
JTextField f5 = new JTextField(30);

JPanel p = new JPanel(new GridLayout(5,1));

p.add(f1);
p.add(f2);
p.add(f3);
p.add(f4);
p.add(f5);

JFrame frame = new JFrame();



frame.add(p);
frame.pack();
frame.setSize(new Dimension(1000,400));
frame.setVisible(true);
}

}

---------- END SOURCE ----------