Problems encountered when installing netbeans 7 in linuxmint 12 64bit and Solutions

After running the sudo sh downloads/netbeans-7.2-ml-javase-linux.sh command, the prompt is:

Can't initialize UI
Running in headless Mode

According to the information in stackoverflow, it turns out to be an openjdk problem. After uninstalling openjdk and installing Sun's JDK, the problem is solved. The command is as follows:

sudo apt-get remove openjdk*  sudo apt-get install sun-java6-jdk 

References: http://stackoverflow.com/questions/8607298/netbeans-installation-error-cant-initialize-ui-running-in-headless-mode