Java - Recommended GC log options for Java 8 and Java 9
Java 8\ -XX:+PrintGCDetails\ -XX:+PrintReferenceGC\ -XX:+PrintTenuringDistribution\ -Xloggc:\ -XX:+PrintGCTimeStamps
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Java - Garbage collectors
1. Serial\ -XX:+UseSerialGC JVM
Java - ZonedDateTime formatter for ISO-8601
Parse example\ 1 2 3 4 5 6 7 DateTimeFormatterBuilder builder = new DateTimeFormatterBuilder(); DateTimeFormatter formatter = builder .parseCaseInsen...
Java - heap dump utilities
Heap histogram\ 1 jmap -histo [pid]
Java - an example code to extract mime type from base64 string of an image
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 private boolean isMatch(byte[] pattern,...