Root your Samsung Galaxy s3

I rooted my S3 using the CasualApp java application.
Here is the java file d2vzw-CASUAL-R795b-BeansTown106
When you run this application, if it complains “Casual.CasualApp: could not find main class”, that means you have an older version of java.
Just follow this link Check my Java.
Update your java. then start the application.
Connect your phone using the USB cable.
Click the do it Button. It will root your phone and then reboot