Can I know the amount of Free memory

[aryajur]

I need to know the amount of free memory remaining on a system. Can this be done in Java. If it can be done please tell me how? Are there any classes??

 

[hologram]

The following code will print the total, free and used amount of memory :

  public Test3() {
  }

  private void doIt() {
      long totalMemory = Runtime.getRuntime().totalMemory();
      long freeMemory = Runtime.getRuntime().freeMemory();
      long usedMemory = totalMemory - freeMemory;
      System.out.println("TotalMemory = " + totalMemory);
      System.out.println("FreeMemory = " + freeMemory);
      System.out.println("Used Memory = " + usedMemory);
  }

  public static void main(String[] args) {
    Test3 example = new Test3();
    example.doIt();
  }

}

You might also want to check :

http://java.sun.com/docs/books/performance/1st_edition/html/JPRAMFootprint.fm.html