Java Utililty Methods JTextArea

void addMessageLogger(JTextArea t)
Add the given component into the list of components that show messages from the message method calls

messageLogs.add(t);

void addStyle(JTextArea textArea, String labelName, boolean isBorder)
add Style

Border border = null;
if (isBorder) {
 Border line = BorderFactory.createLineBorder(Color.LIGHT_GRAY);
 TitledBorder titled = BorderFactory.createTitledBorder(line, labelName);
 titled.setTitleFont(new Font("Verdana", 0, 13));
 titled.setTitleColor(new Color(213, 225, 185));
 Border empty = new EmptyBorder(5, 8, 5, 8);
 CompoundBorder cBorder = new CompoundBorder(titled, empty);
...

void adjustToText(JTextArea testString)
adjust To Text

testString.setColumns(columns(testString));
testString.setRows(estimatedRows(testString));

void appendNewLine(final JTextArea textArea, final String line)
Appends a line and a new line to a text area.

textArea.append(line);
textArea.append("\n");
textArea.setCaretPosition(textArea.getDocument().getLength());

void applyDefaultProperties(final JTextArea comp)
Sets default background and foreground color as well as a default font for the specified component.

if (comp == null) {
 return;
applyProperties(comp, "TextArea.background", 
 "TextArea.foreground", 
 "TextArea.font"); 

void attachSimpleUndoManager(JTextArea jta)
attach Simple Undo Manager

UndoManager um = new UndoManager();
jta.getDocument().addUndoableEditListener(um);
jta.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("control Z"),
 "doUndo");
jta.getActionMap().put("doUndo", new AbstractAction() {
 @Override
 public void actionPerformed(ActionEvent e) {
 if (um.canUndo())
...

void blockUncomment(JTextArea scriptPanel)
Block uncomment the selected text in the given script panel.

final int startOffset = scriptPanel.getSelectionStart();
final int endOffset = scriptPanel.getSelectionEnd();
scriptPanel.replaceRange("", endOffset - BLOCK_COMMENT_END.length(), endOffset);
scriptPanel.replaceRange("", startOffset, startOffset + BLOCK_COMMENT_START.length());
scriptPanel.setSelectionStart(startOffset);
scriptPanel.setSelectionEnd(endOffset - BLOCK_COMMENT_START.length() - BLOCK_COMMENT_END.length());

void clearTextArea(JTextArea textArea)
clear Text Area

if (textArea.getLineCount() > 200) {
 textArea.setText("");

int columns(JTextArea testString)
columns

return Math.min((int) (testString.getText().length() * 0.66), 80);

void commentSQL(JTextArea scriptPanel, String commentCharacter)
Comment the selected text in the given script panel.

final Element root = scriptPanel.getDocument().getDefaultRootElement();
final int numberOfLastLine = root.getElementIndex(scriptPanel.getSelectionEnd());
int currentLineNumber = root.getElementIndex(scriptPanel.getSelectionStart());
while (currentLineNumber <= numberOfLastLine) {
 scriptPanel.insert(commentCharacter, root.getElement(currentLineNumber).getStartOffset());
 currentLineNumber++;