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Commons Collections example source code file (TestHashedMap.java)

This example Commons Collections source code file (TestHashedMap.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

abstracttestiterablemap, hashedmap, hashedmap, map, map, string, test, test, testhashedmap, testhashedmap, util

The Commons Collections TestHashedMap.java source code

 *  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 org.apache.commons.collections.map;

import java.util.Map;

import junit.framework.Test;
import junit.textui.TestRunner;

import org.apache.commons.collections.BulkTest;

 * JUnit tests.
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * @author Stephen Colebourne
public class TestHashedMap extends AbstractTestIterableMap {

    public TestHashedMap(String testName) {

    public static void main(String[] args) {
    public static Test suite() {
        return BulkTest.makeSuite(TestHashedMap.class);

    public Map makeEmptyMap() {
        return new HashedMap();
    public String getCompatibilityVersion() {
        return "3";

    public void testClone() {
        HashedMap map = new HashedMap(10);
        map.put("1", "1");
        Map cloned = (Map) map.clone();
        assertEquals(map.size(), cloned.size());
        assertSame(map.get("1"), cloned.get("1"));

    public void testInternalState() {
        HashedMap map = new HashedMap(42, 0.75f);
        assertEquals(0.75f, map.loadFactor, 0.1f);
        assertEquals(0, map.size);
        assertEquals(64, map.data.length);
        assertEquals(48, map.threshold);
        assertEquals(0, map.modCount);

//    public void testCreate() throws Exception {
//        resetEmpty();
//        writeExternalFormToDisk((java.io.Serializable) map, "D:/dev/collections/data/test/HashedMap.emptyCollection.version3.obj");
//        resetFull();
//        writeExternalFormToDisk((java.io.Serializable) map, "D:/dev/collections/data/test/HashedMap.fullCollection.version3.obj");
//    }

Other Commons Collections examples (source code examples)

Here is a short list of links related to this Commons Collections TestHashedMap.java source code file:

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