at.spardat.xma.mdl.MemoryEstimator Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2003, 2007 s IT Solutions AT Spardat GmbH .
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* s IT Solutions AT Spardat GmbH - initial API and implementation
*******************************************************************************/
// @(#) $Id: MemoryEstimator.java 2089 2007-11-28 13:56:13Z s3460 $
package at.spardat.xma.mdl;
/**
* Provides some utility method to estimate the memory consumption of java objects.
*
* @author YSD, 01.06.2003 10:21:52
*/
public class MemoryEstimator {
/**
* Returns the number of bytes an java objects consumes that has numInstances
* instance variables. Thats the size of the object itself, without complex
* instance variables.
*/
public static int sizeOfObject (int numInstances) {
return 8 + 4 * numInstances;
}
/**
* Returns the number of bytes a String consumes if it is not shared with other
* Strings.
*/
public static int sizeOf (String s) {
return 38 + 2 * s.length();
}
}