ansaurus

Question

Answer 1

A:

Your code is inserting your text at the same position ! Replace 0 by whatever column you want the text to be at. And see the result

EDIT:

Column size means amount of characters, not words. As commented, have a look at JTable

Marc 2010-06-05 21:58:12

Ya i dont really get the position property. basiclly i want to set the price, cost, quantity, name into individual columns

nubme 2010-06-05 21:59:02

You are not using the right Swing component then.You better have a look at JTable. which have proper column. You simply set up an array containing all your values, each element of the array to be placed in its corresponding column.

Marc 2010-06-05 22:01:32

ya i was thinking about using that, but i was unsure how to do it in a while statement since im reading in values from a file.

nubme 2010-06-05 22:11:00

See other answer about JTable. They are not as easy to use as a simple JTextArea. See several examples, you will get it. JTable is what you need. The fact that you read values from a file, database or other is independent to what you use to display them.

Marc 2010-06-06 11:47:02

Answer 2

+1 A:

A column refers to a character, so if columns = 4 it means the width will be 4 characters wide.

JRL 2010-06-05 21:59:06

oh, is there anyway to separate my text into columns or indent it so that it appears evenly in my textarea?

nubme 2010-06-05 22:00:12

Use a JTable instead, or multiple JTextAreas

JRL 2010-06-05 22:00:37

Answer 3

+1 A:

The best approach is to use a JTable.

But if you really want to use a text cmponent you can use a JTextPane and play with tabs. See my example in JTextPane Tab Size.

camickr 2010-06-05 22:34:29

Answer 4

A:

There are situations when the (mighty) JTable is too much.

If you just want a JLabel/ JTextArea like component with some columns use a HTML-Table in a JTextPane or in a JEditorPane:

import java.awt.Font;
import javax.swing.JDialog;
import javax.swing.JTextPane;
import javax.swing.UIManager;
import javax.swing.text.html.HTMLDocument;

public class ColumnsInJTextPane
{

  public ColumnsInJTextPane()
  {
    double price = 124.75;
    int quantity = 3;
    String itemName = " iPad";

    JTextPane t = new JTextPane();
    t.setContentType( "text/html" );

    StringBuilder text = new StringBuilder( 150 );
    text.append( "<html><body>" );
    text.append( "<table border='0' style='margin:4px 2px 12px 6px' width='100%'>" );

    text.append( "<tr>" + "<td width='30' align='left' valign='top' style='margin-right:8px'>" );
    text.append( price );
    text.append( "</td>" );

    text.append( "<td align='left' valign='top' style='margin-right:8px'>" );
    text.append( itemName );
    text.append( "</td>" );

    text.append( "<td width='20' align='left' valign='top' style='margin-right:8px'>" );
    text.append( quantity );
    text.append( "</td>" + "</tr>" );

    text.append( "<tr>" + "<td>" );
    text.append( price * 4 );
    text.append( "</td>" );

    text.append( "<td>" );
    text.append( (((Boolean) itemName.equals( itemName )).toString().concat( itemName )) );
    text.append( "</td>" );

    text.append( "<td>" );
    text.append( quantity / 2 );
    text.append( "</td>" + "</tr>" );

    text.append( "</table>" );
    text.append( "</body></html>" );

    t.setText( text.toString() );

    //to get a consistent (body) appearance use the font from the Label using a CSS rule (instead of the value in javax.swing.text.html.default.css)
    Font font = UIManager.getFont( "Label.font" );
    String bodyRule =
    "body { font-family: " + font.getFamily() + "; " + "font-size: " + font.getSize() + "pt; }";
    ((HTMLDocument) t.getDocument()).getStyleSheet().addRule( bodyRule );

    JDialog d = new JDialog();
    d.add( t );
    d.pack();
    d.setVisible( true );
  }

  public static void main( String[] args )
  {
    new ColumnsInJTextPane();
  }

}

There are some tweaks and tricks in this example which demonstrate how evil HTML really is ;-)

the trimming of spaces is utilized
the second column is growing/ shrinking with the JDialog size because of the omitted width in its td-Tag
css margins have been thrown in for no special reason
for a consistent appearance the font of the JLabel has to be fetched from the UIManager and set via CSS
if you reduce the width of the JDialog the text in the second column is nicely word-wrapped
(ooh, wait! this is a nice feature of HTML)

bobndrew 2010-06-08 13:51:11

ansaurus

tags:

views:

answers:

Java Swing: JTextArea columns question

related questions