dcsimg
Login | Register   
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Mar 6, 2000

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Determine Your Heap Size

The following example program prints out both the total and free memory sizes, allocates a chunk of memory, and then prints the memory sizes again. If the initial size of your JVM's heap is about 1 MB, you should see the total memory increase as the heap grows. The amount of free memory should change as a function of the amount of memory allocated and the increase in size of the heap.
 
public final class HeapSize {

  public static final int DATA_SIZE = 1024*1024;

  public static final void printMemory(Runtime runtime) {
    System.out.println("\nTotal Memory: " + runtime.totalMemory());
    System.out.println("Free Memory : " + runtime.freeMemory());
  }

  public static final void main(String[] args) {
    Runtime runtime;
    byte[] data;

    runtime = Runtime.getRuntime();

    printMemory(runtime);

    data = new byte[DATA_SIZE];

    printMemory(runtime);
  }
}

Daniel Savarese
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date