The following test program shows different metrics between JDK 6 and JDK 7
Its extreme if you use the "all spaces" string.
Note run on Windows as its using a Windows font.


import javax.swing.*;
import java.awt.Font;
import java.awt.*;

public class Gulim extends JComponent {

  public static void main(String args[]) {
    JFrame frame = new JFrame("Korean font test");
    frame.setBounds(100, 100, 600, 500);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new Gulim());
   frame.setVisible(true);
}
public Dimension getPreferredSize() {
  return new Dimension(600,500);
}
public void paintComponent(Graphics g) {

     
     int y=20;
      String text = " X. ABCDEFGabcdefg What type of request do you want to run?";
      //String text = "ZX.ZABCDEFGabcdefgZWhatZtypeofZrequestZdoZyouZwantZtoZrun?";
      //String text = " ";
      for (int sz=9; sz<18;sz++) {
         Font f = new Font("Gulim", Font.BOLD, sz);
         g.setFont(f);
         String s = text + " " + Integer.valueOf(sz);
         g.drawString(s, 0, y);
         y+=sz+2;
     }
}
 
}