You can achieve this, though not directly, since you have to save the reference to the Highlight that you had added to the said line, hence you have to traverse through all the Highlights to remove the one you want, have a look at the program attached, might be this will help you to attain … Read more
You need to use a JTextPane and use attributes. The following should center all the text: StyledDocument doc = textPane.getStyledDocument(); SimpleAttributeSet center = new SimpleAttributeSet(); StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER); doc.setParagraphAttributes(0, doc.getLength(), center, false); Edit: Vertical centering is not supported as far as I know. Here is some code you might find useful: Vertical Alignment of JTextPane
for listening changes into JTextComponent is there DocumentListener, if you have to need control over inputed Char, sings, whitespace chars or word(s) you have to implements DocumentFilter notice for Chars reservated by programing language(s) you have to use double escapes, \\( instead of ( or \\{ instead of { otherwise you get Exception in thread … Read more
Instead of using JTextArea.setText(String text), use JTextArea.append(String text). Appends the given text to the end of the document. Does nothing if the model is null or the string is null or empty. This will add text on to the end of your JTextArea. Another option would be to use getText() to get the text from … Read more
When using JDK1.4.2 (or earlier) the most common suggestion you will find in the forums is to use code like the following: textArea.append(…); textArea.setCaretPosition(textArea.getDocument().getLength()); However, I have just noticed that in JDK5 this issue has actually been resolved by an API change. You can now control this behaviour by setting a property on the DefaultCaret … Read more
You can override getToolTipText(Mouse Event event) as needed. Addendum: JTextComponent, the parent of JTextArea provides location information via two methods: modelToView() and viewToModel(). The latter should let you translate the mouse location into a document offset.
What am I doing wrong, what am I forgetting about? Nothing, really. I modified your example to use “<=” on the width and to highlight a few features: FontMetrics notes, “the advance of a String is not necessarily the sum of the advances of its characters measured in isolation…” The preferred size of the text … Read more
You need to redirect the print stream to an output stream you can control… This is an example of concept I developed for an application I’m working on for work. We use this to bring up the output console when it’s running at user sites so we can see what’s being sent to standard out…until … Read more
JTextArea is meant to entertain Plain Text. The settings applied to a single character applies to whole of the document in JTextArea. But with JTextPane or JEditorPane you have the choice, to colour your String Literals as per your liking. Here with the help of JTextPane, you can do it like this : import java.awt.*; … Read more
Many Swing components support printing out of the box You could use something as simple as JTextArea.print to get started, for example import java.awt.BorderLayout; import java.awt.Color; import java.awt.EventQueue; import java.awt.Font; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.Rectangle2D; import java.awt.image.BufferedImage; import java.awt.print.PageFormat; import java.awt.print.Paper; import java.awt.print.Printable; import java.awt.print.PrinterException; import java.io.File; import java.io.IOException; import java.util.StringJoiner; import … Read more