Class MemoryUtil


  • public final class MemoryUtil
    extends java.lang.Object
    Memory related utilities.
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static long getUsedMemory()
      Returns the currently used memory, after calling garbage collector and waiting enough to get maximal chance it is actually called.
      static void main​(java.lang.String[] args)  
      static long sizeOf​(java.lang.Class<?> clazz)
      Returns the approximate size of a default instance of the given class.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Method Detail

      • sizeOf

        public static long sizeOf​(java.lang.Class<?> clazz)
        Returns the approximate size of a default instance of the given class.
        Parameters:
        clazz - the class to evaluate.
        Returns:
        the estimated size of instance, in bytes.
      • getUsedMemory

        public static long getUsedMemory()
        Returns the currently used memory, after calling garbage collector and waiting enough to get maximal chance it is actually called. But since Runtime.gc() is only advisory, results returned by this method should be treated as rough approximation only.
        Returns:
        the currently used memory, in bytes.
      • main

        public static void main​(java.lang.String[] args)
                         throws java.lang.ClassNotFoundException
        Throws:
        java.lang.ClassNotFoundException