Java Utililty Methods JTextArea

List of utility methods to do JTextArea

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Description

The list of methods to do JTextArea are organized into topic(s).

Method

voidsetCaretPosition(int i, int j, JTextArea jtextarea)
set Caret Position 
if (i < 0 || j < 0)
    return;
StringBuffer stringbuffer = new StringBuffer(jtextarea.getText());
int k = 0;
int l;
for (l = stringbuffer.length(); i > 0 && k < l; k++)
    if (stringbuffer.charAt(k) == '\n')
        i--;
...
voidsetCaretPosition(JTextArea ta)
set Caret Position 
ta.setCaretPosition(ta.getDocument().getLength());
voidsetCeil(final JTextArea textArea)
set Ceil 
SwingUtilities.invokeLater(new Runnable() {
    public void run() {
        JViewport v = (JViewport) textArea.getParent();
        v.setViewPosition(new Point(0, 0));
});
voidsetModelValue(JTextArea ta, String value)
set Model Value 
if (value != null) {
    ta.setText(value);
voidsetTextSafe(JTextArea textArea, String value)
set the text of a JTextArea without moving the caret normally, setting the text would trigger am event that scrolls the Text Area into view. 
Caret caret = textArea.getCaret();
caret.setDot(0);
textArea.setCaret(null);
textArea.setText(value);
textArea.setCaret(caret);
voidshowMemo(JTextArea memo, boolean visible)
show Memo 
memo.setVisible(visible);
if (memo.getParent() instanceof JScrollPane)
    memo.getParent().setVisible(visible);
else if (memo.getParent().getParent() instanceof JScrollPane)
    memo.getParent().getParent().setVisible(visible);
JTextAreatextAreaAsLabel(JTextArea textArea)
This will allow selection and copy to work but still retain the label look 
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textComponentAsLabel(textArea);
return textArea;
voidvalidarArticuloDescripcion(JTextArea descripcion, KeyEvent evt)
validar Articulo Descripcion 
char ch = evt.getKeyChar();
if ((descripcion.getText().length() == 500)
        || ((ch > '9' || ch < '0') && (ch > 'z' || ch < 'a') && (ch > 'z' || ch < 'A')
                && (ch != KeyEvent.VK_SPACE) && ch != KeyEvent.VK_COMMA && ch != KeyEvent.VK_PERIOD)) {
    evt.consume();
voidvalidateView(JTextArea view)
Validates that the given view is not null and has a Document . 
if (view == null || view.getDocument() == null) {
    throw new IllegalArgumentException("Parameter view must not be null and must have a Document.");