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");

} } } }