It is very easy to apply Nimbus Look and Feel which was introduced in Java SE 6 update 10 release. Copy and past following code before creating the (GUI) Graphical User Interface
Nimbus Look and Feel
Before Applying the Nimbus Look and Feel
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Nimbus Look and Feel
Before Applying the Nimbus Look and Feel
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception ex) {
// If the nibus is not available, GUI will set to the system's look and feel
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}

