Scan this Java file for usages of SecurityManager, Thread.stop/suspend/resume, Object.finalize, sun.misc.Unsafe memory methods, System.loadLibrary and other JNI loading, and the old java.net.URL constructors. For each finding, say which Java release changed it (SecurityManager: cannot be installed since 24; Thread.suspend/resume: still compile on 21, gone by 23; Thread.stop: throws UnsupportedOperationException on 21 and 25, removed in 26; finalize: still runs, deprecated for removal; Unsafe memory access and JNI loading: run-time warnings from 24) and give a replacement with a before/after code snippet.
