Here you can find the source of checkLowMemory()
public static boolean checkLowMemory()
//package com.java2s; /****************************************************************************** * * Copyright 2014 Paphus Solutions Inc. * * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html * * 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./*w w w.ja v a 2 s . c om*/ * ******************************************************************************/ public class Main { public static boolean checkLowMemory() { return checkLowMemory(0.2); } public static boolean checkLowMemory(double ratio) { return (Runtime.getRuntime().totalMemory() >= Runtime.getRuntime().maxMemory()) && (Runtime.getRuntime().freeMemory() < (Runtime.getRuntime().maxMemory() * ratio)); } }