How to change the look and feel of a single part of a java program

Question

So I\'m making a program selection tool, and currently i like the way everything looks with just the java look and feel. the only thing i want to change is the JFileChooser

Answer 1

You should read about Look and Feel.
Also I don't think you can have different L&F per component. At least I've never seen an application with non-uniform L&F