I solved this problem. All I did is just pasted these lines in java.policy file(just search this file in your java installation folder and you will get it at 3 places and need to paste this at last in all files)
permission java.awt.AWTPermission "createRobot";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.awt.AWTPermission "readDisplayPixels", "read";
permission java.io.FilePermission "<<ALL FILES>>", "read, write, delete, execute";