How to change the resolution ?

Im using the SWING there are some GUI issues when i change the resolution.
Can I fix a resolution for my application ?

First of all it is not a good practise to fix the resolution since different people like different type of resolutions.
Any if you want to continue with resolution change refer :Lesson: Full-Screen Exclusive Mode API (The Java™ Tutorials > Bonus)

Another choice is to check the layouts and make sure you havent hard coded the width and height in pixel values