Very Urgent - Draw a string in a rectangle with a given width

Question

Hi
I have a jtextArea and I have set its width to a fixed value. I set the wrap line property to tru and the word wrap true so as if the word is too large it will be displayed on the next line of the jtextArea. I read a string value and give it to the JTextArea.
I want to know the height of the JTextarea after the String is wrapped in it. The string may be of a single line but after it is wrapped, in the JTextArea it may appear as multiple line. All the methods of the JTextarea tell me that the JTextarea has a string of one line and the rectangle it returns does not match the true one.
I want to know either the real values of the rectangle after the string is wrapped or the number of lines the string is divided as it appears in the textareas.
My email address is [email protected]
Thx.. and please help..

Answer 1

See this example of line numbering in JEditorPane.
I think in the text area it's the same
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.rtf.*;
class Test extends JFrame
public Test()
super("Test");
JEditorPane edit = new JEditorPane();
edit.setEditorKit(new MyRTFEditorKit());
edit.setEditable(true);
JScrollPane scroll=new JScrollPane(edit);
getContentPane().add(scroll);
setSize(300,300);
setVisible(true);
public static void main(String a[])
new Test();
class MyRTFEditorKit extends RTFEditorKit
public ViewFactory getViewFactory()
return new MyRTFViewFactory();
class MyRTFViewFactory implements ViewFactory
public View create(Element elem)
String kind = elem.getName();
if (kind != null)
if (kind.equals(AbstractDocument.ContentElementName)) {
return new LabelView(elem);
} else if (kind.equals(AbstractDocument.ParagraphElementName)) {
// return new ParagraphView(elem);
return new MyParagraphView(elem);
} else if (kind.equals(AbstractDocument.SectionElementName)) {
// return new BoxView(elem, View.Y_AXIS);
return new MySectionView(elem, View.Y_AXIS);
} else if (kind.equals(StyleConstants.ComponentElementName)) {
return new ComponentView(elem);
} else if (kind.equals(StyleConstants.IconElementName)) {
return new IconView(elem);
// default to text display
return new LabelView(elem);
class MySectionView extends BoxView {
public MySectionView(Element e, int axis)
super(e,axis);
public void paintChild(Graphics g,Rectangle r,int n) {
if (n>0) {
MyParagraphView child=(MyParagraphView)this.getView(n-1);
int shift=child.shift+child.childCount;
MyParagraphView current=(MyParagraphView)this.getView(n);
current.shift=shift;
super.paintChild(g,r,n);
class MyParagraphView extends javax.swing.text.ParagraphView
public int childCount;
public int shift=0;
public MyParagraphView(Element e)
super(e);
short top=0;
short left=20;
short bottom=0;
short right=0;
this.setInsets(top,left,bottom,right);
public void paint(Graphics g, Shape a)
childCount=this.getViewCount();
super.paint (g,a);
int rowCountInThisParagraph=this.getViewCount(); //<----- YOU HAVE REAL ROW COUNT FOR ONE PARAGRAPH}
System.err.println(rowCountInThisParagraph);
public void paintChild(Graphics g,Rectangle r,int n) {
super.paintChild(g,r,n);
g.drawString(Integer.toString(shift+n+1),r.x-20,r.y+r.height-3);
best regards
Stas