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1. Java: JFrame.setLocationRelativeTo(null) not centering the window on Ubuntu 10.04 / gnome 2.30.2 with OpenJDK 1.6.0_18    stackoverflow.com

Sample code: 

    JFrame jFrame = new JFrame("Test");
    jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jFrame.setLocationRelativeTo(null);
    jFrame.setSize(600, 600);
    jFrame.pack();
    // ...

2. Java, Swing and Xubuntu, JFrames not correct    stackoverflow.com

I'm completely new to Linux and have been trying to get my (Windows built) Java Swing projects to work correctly on XUbuntu on a separate machine from executable jar files I ...