Advanced Text Capabilities - The Definitive Guide to Java Swing - page 596

Using TabStop Objects
Once you have a TabStop object, or a group of them, you pass the object to the TabSet constructor
in an array of TabStop objects like this:
TabSet tabset = new TabSet(new TabStop[] {tabstop})
As an example, Listing 16-5 shows the source for the TabStop alignment program shown in
Figure 16-5.
Listing 16-5. Using Tabs
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.awt.*;
public class TabSample {
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
JFrame frame = new JFrame("Tab Attributes");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
StyledDocument document = new DefaultStyledDocument();
int positions[] = {TabStop.ALIGN_BAR, TabStop.ALIGN_CENTER,
TabStop.ALIGN_DECIMAL, TabStop.ALIGN_LEFT, TabStop.ALIGN_RIGHT};
String strings[] = {"\tBAR\n", "\tCENTER\n", "\t3.14159265\n",
"\tLEFT\n", "\tRIGHT\n"};
SimpleAttributeSet attributes = new SimpleAttributeSet();
for (int i=0, n=positions.length; i<n; i++) {
TabStop tabstop = new TabStop(150, positions[i], TabStop.LEAD_DOTS);
try {
int position = document.getLength();
document.insertString(position, strings[i], null);
TabSet tabset = new TabSet(new TabStop[] {tabstop});
StyleConstants.setTabSet(attributes, tabset);
document.setParagraphAttributes(position, 1, attributes, false);
} catch (BadLocationException badLocationException) {
System.err.println("Bad Location");
}
}