How to Install Look And Feel in Swing

1. Programmatically

UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());

2. System Property

java -Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel MyApp

3. Globally

Add the following line to the $JAVA_HOME/lib/swing.properties:

swing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel

For details see https://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/nimbus.html.