Where can i learn make gui or fancy looking coloured shapes and figures with java

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Answer 1

Another option is a programming language called Processing. Processing is used to produce artistic designs. It is closely related to Java and therefore is quick to learn if you’re comfortable with Java.
You can learn about Processing here:
https://processing.org

Java Swing & Java FX can be used to produce coloured shapes, figures, etc. as Martin Taylor stated.
Here is the Oracle tutorial for Java Swing:
https://docs.oracle.com/javase/tutorial/uiswing/
Also search YouTube for videos on how to use the GUI designer in whichever IDE you are using (Intellij IDEA, Eclipse, NetBeans, etc). Those can help you get a jump start.