René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Filenames ending with a \"negative\" number do not work","articleBody":"I work as a grader for an intro CS class that uses Processing. The software that students use to submit their assignments will append numbers to the filename if a student resubmits their assignment, which gives me something like \"assignment-1.pde\" when I download it. \r\n\r\nWhen I try to run this file using the command line compiler, I get a crash with the following output:\r\n```\r\nException in thread \"main\" java.lang.ArrayIndexOutOfBoundsException: 0\r\n        at processing.app.Sketch.getCode(Sketch.java:1644)\r\n        at processing.app.Sketch.getMainProgram(Sketch.java:1669)\r\n        at processing.mode.java.JavaBuild.preprocess(JavaBuild.java:216)\r\n        at processing.mode.java.JavaBuild.preprocess(JavaBuild.java:155)\r\n        at processing.mode.java.JavaBuild.build(JavaBuild.java:122)\r\n        at processing.mode.java.Commander.\u003cinit\u003e(Commander.java:274)\r\n        at processing.mode.java.Commander.main(Commander.java:86)\r\n```\r\n\r\nWhen I try to open the file with the IDE, I get an error there as well:\r\n![processingissue](https://cloud.githubusercontent.com/assets/2173909/22406673/fb39baae-e60b-11e6-8b2f-baf539993f53.png)\r\n\r\nI get the same error if I change the ending to \"-2\", so only it seems that ending in \"negative\" numbers breaks something. Removing the \"-1\" causes the error to go away given nothing else is wrong with the filename.","author":{"url":"https://github.com/Jebbs","@type":"Person","name":"Jebbs"},"datePublished":"2017-01-29T18:35:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/4861/processing/issues/4861"}