如何确定我的java程序消耗了多少内存

Question

我有一个课程如下：

class MyClass
{
 public static void main(String args[])
 {
  //I want statistics here
 }
}

任何帮助都将不胜感激。

Answer 1

运行时运行时= Runtime.getRuntime（）;

NumberFormat format = NumberFormat.getInstance();

StringBuilder sb = new StringBuilder();
long maxMemory = runtime.maxMemory();
long allocatedMemory = runtime.totalMemory();
long freeMemory = runtime.freeMemory();

sb.append("free memory: " + format.format(freeMemory / 1024) + "<br/>");
sb.append("allocated memory: " + format.format(allocatedMemory / 1024) + "<br/>");
sb.append("max memory: " + format.format(maxMemory / 1024) + "<br/>");
sb.append("total free memory: " + format.format((freeMemory + (maxMemory - allocatedMemory)) / 1024) + "<br/>");

Answer 2

MemoryMXBean包含所有可用的内存数据。这包括有关堆和非堆内存的数据。 Runtime类仅提供对堆内存信息的访问。