Java Utililty Methods JLabel

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

messageLogs.add(t);

void addParameterRow(Container container, JLabel label, Component component)
Add a label-value pair to a container that uses GridBagLayout.

GridBagLayout gridbag = null;
try {
 gridbag = (GridBagLayout) (container.getLayout());
} catch (Exception e) {
 System.err
 .println("Hey! You called addRow with" + " a container that doesn't " + " use GridBagLayout!");
 return;
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
c.insets = new Insets(0, 5, 0, 5);
gridbag.setConstraints(label, c);
container.add(label);
c.gridwidth = GridBagConstraints.REMAINDER;
c.weightx = 1.0;
gridbag.setConstraints(component, c);
container.add(component);

void clear(JLabel... fields)
clear

for (JLabel field : fields) {
 field.setText("");

void ensureCustomBackgroundStored(JLabel comp)
ensure Custom Background Stored

if (getStoredBackground(comp) != null)
 return;
Color background = comp.getBackground();
if ((background == null) || (background instanceof UIResource) || (background == WARNING_BACKGROUND)
 || (background == ERROR_BACKGROUND))
 return;
comp.putClientProperty(STORED_BACKGROUND_KEY, background);

void exibeMensagemTemporaria(final JLabel lblMensagem, String mensagem)
exibe Mensagem Temporaria

lblMensagem.setText(mensagem);
timer = new Timer(4 * 1000, new ActionListener() {
 public void actionPerformed(ActionEvent event) {
 timer.stop();
 lblMensagem.setText("");
});
timer.start();
...

Dimension extendByIcon(JLabel label, Dimension dm)
extend By Icon

if (label == null) {
 throw new IllegalArgumentException("label==null");
if (dm == null) {
 throw new IllegalArgumentException("dm==null");
javax.swing.Icon icon = label.getIcon();
if (icon == null)
...

int findMaxLabelWidth(JLabel... jLabels)
find Max Label Width

int maxvalue = 0;
for (JLabel label : jLabels) {
 FontMetrics fm = label.getFontMetrics(label.getFont());
 int width = fm.stringWidth(label.getText());
 if (maxvalue < width) {
 maxvalue = width;
return maxvalue;

String getLabelValue(JLabel lbl)
get Label Value

String ret = lbl.getText().trim();
if (!ret.equals("")) {
 return ret;
return null;

void getRoughStroke(final JLabel _jlbl_stroke)
Apply stroke on background.

final int strokeDistance = 20;
if (_jlbl_stroke.getWidth() > 0 && _jlbl_stroke.getHeight() > 0
) {
 BufferedImage bi_stroke = new BufferedImage(_jlbl_stroke.getWidth(), _jlbl_stroke.getHeight(),
 BufferedImage.TYPE_INT_ARGB);
 for (int x = 0; x < bi_stroke.getWidth(); x++) {
 for (int y = 0; y < bi_stroke.getHeight(); y++) {
 if ((x + y) % strokeDistance == 0) {
...

Color getStoredBackground(JLabel comp)
get Stored Background

return (Color) comp.getClientProperty(STORED_BACKGROUND_KEY);