Here you can find the source of getStringMemoryUsage(String s)
public static int getStringMemoryUsage(String s)
//package com.java2s; /*/*w w w. j a v a 2 s .c o m*/ // Licensed to DynamoBI Corporation (DynamoBI) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. DynamoBI licenses this file // to you under the Apache License, Version 2.0 (the // "License"); you may not use this file except in compliance // with the License. You may obtain a copy of the License at // http://www.apache.org/licenses/LICENSE-2.0 // Unless required by applicable law or agreed to in writing, // software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY // KIND, either express or implied. See the License for the // specific language governing permissions and limitations // under the License. */ public class Main { /** * Calculates the memory used by a string's data (not including the String * object itself). This represents the actual memory used by the Java * Unicode representation, not an encoding. * * @return number of bytes used */ public static int getStringMemoryUsage(String s) { return s.length() * 2; } }