import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class MoveMessageDemo extends JPanel {

    private JButton button = new JButton();
    
    public MoveMessageDemo() {
        button.setText("Call the QQ");
        button.addMouseListener(new MouseAdapter() {

            public void mousePressed(MouseEvent e) {
                // TODO Auto-generated method stub
                try {
                    Runtime.getRuntime().exec("D:\\Program Files\\Tencent\\QQ\\Bin\\QQ.exe");
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }

        });
        add(button);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setTitle("MoveMessageDemo");
        frame.getContentPane().add(new MoveMessageDemo());
        frame.setSize(200, 100);
        frame.setVisible(true);
    }
}

------解决方案--------------------

本地试了一下QQ，QQGame 正常登录。
LZ的游戏，需要特别的环境变量或路径设置吧。
在Runtime.getRuntime().exec(）方法加进去