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

public class Test { 
  public static void main(final String args[]) { 
        String str = "Used: N/A"; 
        JLabel label = new JLabel(str); 
        label.setFont(new Font("Tahoma", Font.PLAIN, 9)); 

        System.err.println("String bounds: " + label.getFontMetrics(label.getFont()).getStringBounds(str, label.getGraphics())); 
        System.err.println("Preferred size: " + label.getPreferredSize()); 
    } 
}