make half jframe transparent using java

Question

I am creating a JFrame Form using Netbeans .Is it possible to make transparent half portion of the JFrame and the remaining half portion as the same . If i use opacity property it applies on the full portion of the JFrame

How is possible to make some portion of the JFrame transparent using java swing.

Answer 1

您可以尝试对不希望透明的框架的一半使用非透明面板，其余的可以使用setOpacity（）;

Answer 2

Nope, this isn't possible. It's all or nothing.
To achieve the effect you're describing you'll want to make the JFrame fully transparent as you are doing. Then put two JPanel inside; make one JPanel opaque and the other transparent.

Edit
After a bit of internetting, I believe this actually can be done to some extent. Using GradientPaint in a custom paint function, you could probably achieve something to this effect.

However, this approach would be, in my opinion, harder to achieve, harder to maintain, less intuitive and less legible.