java获取程序运行须要的内存和时间

//消耗的内存 Runtime r = Runtime.getRuntime(); r.gc(); long startMem = r.freeMemory(); // 开始时的剩余内存 long endMem = r.freeMemory(); // 结束时的剩余内存 long mem= startMem - endMem ; // //消耗的时间 double startTime = Sy

>>阅读原文<<