multiple worlds are created until program runs out of memory

2012-10-02T04:22:21Z

Hi, I am in a Java I programming class and we are using "Exploring Wonderland: Java Programming Using Alice and Media Computation", by Wanda Dann et al, as the text book. My DrJava installation on my new Windows 7 PC was working just fine for the first 2 weeks, but a week and a half ago, early into Chapter 4, it started acting crazy. When I tried a simple variable declaration (that I had already successfully done at previous sessions on same PC), DrJava started creating non-stop multiple worlds alternating between empty worlds and ones with various colored turtles until the program says it has run out of memory. Nothing I try will stop this from happening. I have tried uninstalling and re-installing DrJava (drjava-stable-20120818-r5686), as well as uninstalling the JDK (jdk1.7.0_07) and JRE (jre7), and the bookclasses and all other related files then re-installing also. I've asked at school and searched and searched online for some solution or to see if anyone else has had this problem, but haven't found anything yet. Now I'm more than a full week behind in homework and struggling to understand what's going on in the class. Any help anyone can give me at all would be so very much appreciated! I've attached a pdf with a screenshot and the details from the Interactions pane if that may help. Thanks so much, Kathy Coyne

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multiple worlds are created until program runs out of memory