current Eden Memory Usage MB - Java java.lang

Java examples for java.lang:Runtime

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Description

current Eden Memory Usage MB

Demo Code

/**/* www  . j  av a  2  s  . c om*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */
//package com.java2s;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryPoolMXBean;
import java.util.List;

public class Main {
    private static final int MBs = 1024 * 1024;

    public static long currentEdenMemoryUsageMB() {
        return currentMemoryUsage("eden");
    }

    private static long currentMemoryUsage(final String name) {
        final List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory
                .getMemoryPoolMXBeans();
        for (final MemoryPoolMXBean bean : memoryPoolMXBeans) {
            if (bean.getName().toLowerCase().indexOf(name) != -1) {
                return bean.getUsage().getUsed() / MBs;
            }
        }
        return 0;
    }
}

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