Java Memory Used usedMemory()

Description

Returns used memory in MB

License

Apache License

Declaration

public static double usedMemory() 

Method Source Code

//package com.java2s;
/*/*from   www.j a  va  2s  . com*/
 * Copyright 2007-2010 the original author or authors.
 * 
 * Licensed 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 {
    /**
     * Returns used memory in MB
     */
    public static double usedMemory() {
        Runtime runtime = Runtime.getRuntime();
        return usedMemory(runtime);
    }

    static double usedMemory(Runtime runtime) {
        long totalMemory = runtime.totalMemory();
        long freeMemory = runtime.freeMemory();
        double usedMemory = (double) (totalMemory - freeMemory) / (double) (1024 * 1024);
        return usedMemory;
    }

    public static void freeMemory() {
        System.gc();
        System.runFinalization();
    }
}

Related

1. usedMemory()
2. usedMemory()
3. usedMemory()
4. usedMemory()
5. usedMemory()
6. usedMemory(Runtime runtime)
7. usedMemoryAsString()
8. usedMemorym()
9. usedMemoryMB()