7. 而JVM_IHashCode方法指针在 openjdk\hotspot\src\share\vm\prims\jvm.cpp中定义为: JVM_ENTRY(jint,JVM_IHashCode(JNIEnv*env,jobject handle))JVMWrapper("JVM_IHashCode");// as implemented in the classic virtual machine; return 0 if object is NULLreturnhandle==NULL?0:ObjectSynchronizer::FastH...
monitor = ObjectSynchronizer::inflate(Self, obj); // Load displaced header and check it has hash code mark = monitor->header(); assert (mark->is_neutral(), "invariant") ; hash = mark->hash(); if (hash == 0) { hash = get_next_hash(Self, obj); temp = mark->copy_set_hash(h...
,源码入口 // src/share/vm/prims/jvm.cppJVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) JVMWrapper("JVM_IHashCode");// as implemented in the classic virtual machine; return 0 if object is NULLreturnhandle== NULL ?0: ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::reso...
Breadth-First Search traversal algorithm - Contains the DijkstrasAlgorithm java class that implements the Strategy interface and implements Dijkstra's shortest path algorithm - Contains the PrimsAlgorithm java class that implements the Strategy interface and implements Prim's minimum-spanning tree algorithm...
(); //延迟100ms之后interrupt t = new Thread(task); t.start(); Thread.sleep(100); t.interrupt(); //延迟1s之后interrupt //这时候 algorithm 里面的for循环调用次数应该足够了,会发生代码即时编译优化并 OSR t = new Thread(task); t.start(); Thread.sleep(1000); //发现线程这次不会对 ...
that may be different. Whenpreparing for the exam, you should cover the entire syllabus and not focus only on topicsor question types used in this practice paper. If anything, the exam paper can be expectedto be harder than this practice paper.There are 12 questions. As in the exam, you...
Subarray Questions: Sliding window, Two Pointer, Kadane's Algorithm Graphs Introduction BFS DFS Working with graph components Minimum Spanning Trees Kruskal Algorithm Prims Algorithm Dijkstra’s shortest path algorithm Topological Sort Bellman ford A* pathfinding Algorithm Dynamic Programming Introduction Re...
而JVM_IHashCode方法指针在 openjdk\hotspot\src\share\vm\prims\jvm.cpp中定义为: JVM_ENTRY(jint,JVM_IHashCode(JNIEnv*env,jobject handle))JVMWrapper("JVM_IHashCode");// as implemented in the classic virtual machine; return 0 if object is NULLreturnhandle==NULL?0:ObjectSynchronizer::FastHashCod...
static int algorithm(int n) { int bestSoFar = 0; for (int i=0; i<n; ++i) { if (Thread.interrupted()) { System.out.println("broken by interrupted"); break; } //增加pow计算,增加计算量,防止循环执行不超过1s就结束了 bestSoFar = (int) Math.pow(i, 0.3); } return bestSoFar; }...
product(intx,hashCode,5,"(Unstable) select hashCode generation algorithm") 1. 当然,OpenJDK6,7中用的都是第一种方案,那么问题又来了,既然都是随机数,那么怎么确保每次都一样的呢? 对象头 这里就需要引入一个对象头的概念,每次对象生成以后,都需要找一个地方存储一下这个对象的hashCode和锁信息,这就是对象...