1-) Java - PANEL UZERİNDEKİ NAME(AD) OLAN TEXTFİELDİ DEGİSTİR
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
Component[] c = jPanel2.getComponents();
for (int i = 0; i < c.length; i++) {
if (c[i].getName() != null) {
if (c[i] instanceof JTextField && c[i].getName().equals("ad")) {
JTextField tmp = (JTextField) c[i];
tmp.setForeground(Color.red);
tmp.setText("ramazan");
} } } }