René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"add compiler problem matcher","articleBody":"I'm puzzled this doesn't set up problem matchers for compiler messages like\r\n```\r\n/home/runner/work/user/repo/src/[...].java:203: warning: [dep-ann] deprecated item is not annotated with @Deprecated\r\n    protected String getResource() {\r\n/home/runner/work/user/repo/src/[...].java:563: error: cannot find symbol\r\n```\r\n\r\nSomething like\r\n```json\r\n\t\t{\r\n\t\t\t\"owner\": \"java\",\r\n\t\t\t\"pattern\": [\r\n\t\t\t\t{\r\n\t\t\t\t\t\"regexp\": \"^([^:]+):(\\\\d+): (warning|error): (.+?)$\",\r\n\t\t\t\t\t\"file\": 1,\r\n\t\t\t\t\t\"line\": 2,\r\n\t\t\t\t\t\"severity\": 3,\r\n\t\t\t\t\t\"message\": 4\r\n\t\t\t\t}\r\n\t\t\t]\r\n\t\t}\r\n```","author":{"url":"https://github.com/Trass3r","@type":"Person","name":"Trass3r"},"datePublished":"2022-01-25T21:49:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/286/setup-java/issues/286"}