2015.04.24 JJUGãã¤ãã»ãã Javaã®ããã°ã©ã ã¯ã©ããã£ã¦åãã¦ããã®? JVMç·¨Read less
2015.04.24 JJUGãã¤ãã»ãã Javaã®ããã°ã©ã ã¯ã©ããã£ã¦åãã¦ããã®? JVMç·¨Read less
10. jmc Java Mission Control â ã¡ã¢ãªçµ±è¨ãã¹ã¬ããæ°ãã¯ã©ã¹æ°ãã°ã©ãã£ã«ã«ã«è¡¨ 示 â jconsoleã¨ä¼¼ããããªæãã ãã©jmcã®æ¹ããªããï¼ â ããã·ã¥ãã¼ãã®ã«ã¹ã¿ãã¤ãºï¼ã°ã©ãã®è¿½å ï¼ãå¯è½ â Flight Recorderã¨ãããããã¡ã¤ãªã³ã°ãã¼ã«ãã ãããåç¨ã©ã¤ã»ã³ã¹ãå¿ è¦ï¼ããã â -XX:+UnlockCommercialFeatures -XX:+FlightRecorder â Eclipseãã©ã°ã¤ã³ã¨ãã¦ãå©ç¨ã§ããï¼ããã
22. Scalaã®ã¡ãªãã 1. å°ãªãã³ã¼ãéã§çç£æ§åä¸ nï® ä¾ Javaã®ä¾ List<User> list = new ArrayList<User>(); list.add(user01); .... Collections.sort(list, new Comparator<User>(){ @Override public int compare(User o1, User o2){ return 01.id - o2.id; } }); Scalaã®ä¾ val list = List(.... User ....) list sort (_.id < _.id)
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