How do i make GUIs in Java?

Question

Now that i have a working program that solves my problem, how do i make it pretty? Are there major differences in designing UI for Linux, Windows, or Macintosh? Should i try to code UI for myself or use a wysiwyg editor? It seems for Android, "all roads lead to" Android Studio. Will a java program made with assistance from Android Studio also run on Windows, or is further coding necessary?

Answer 1

for java look at swing components or javaFX
Android UI isn't compatible with desktop app and viceversa