java string

String.intern()

• http://java-performance.info/string-intern-in-java-6-7-8/
  • JDK6 : Perm 영역. OOM 위험
  • JDK7이후 : Heap으로. GC됨.
• http://stackoverflow.com/questions/348985/deadlock-on-synchronized-string-intern
  • String.intern() is a native method