home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Lucene example source code file (TestNumberTools.java)

This example Lucene source code file (TestNumberTools.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 - Lucene tags/keywords

lucenetestcase, lucenetestcase, numbertools, numbertools, string, string, testnumbertools, testnumbertools

The Lucene TestNumberTools.java source code

package org.apache.lucene.document;

 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

import org.apache.lucene.util.LuceneTestCase;

public class TestNumberTools extends LuceneTestCase {
    public void testNearZero() {
        for (int i = -100; i <= 100; i++) {
            for (int j = -100; j <= 100; j++) {
                subtestTwoLongs(i, j);

    public void testMax() {
        // make sure the constants convert to their equivalents
        assertEquals(Long.MAX_VALUE, NumberTools
        assertEquals(NumberTools.MAX_STRING_VALUE, NumberTools

        // test near MAX, too
        for (long l = Long.MAX_VALUE; l > Long.MAX_VALUE - 10000; l--) {
            subtestTwoLongs(l, l - 1);

    public void testMin() {
        // make sure the constants convert to their equivelents
        assertEquals(Long.MIN_VALUE, NumberTools
        assertEquals(NumberTools.MIN_STRING_VALUE, NumberTools

        // test near MIN, too
        for (long l = Long.MIN_VALUE; l < Long.MIN_VALUE + 10000; l++) {
            subtestTwoLongs(l, l + 1);

    private static void subtestTwoLongs(long i, long j) {
        // convert to strings
        String a = NumberTools.longToString(i);
        String b = NumberTools.longToString(j);

        // are they the right length?
        assertEquals(NumberTools.STR_SIZE, a.length());
        assertEquals(NumberTools.STR_SIZE, b.length());

        // are they the right order?
        if (i < j) {
            assertTrue(a.compareTo(b) < 0);
        } else if (i > j) {
            assertTrue(a.compareTo(b) > 0);
        } else {
            assertEquals(a, b);

        // can we convert them back to longs?
        long i2 = NumberTools.stringToLong(a);
        long j2 = NumberTools.stringToLong(b);

        assertEquals(i, i2);
        assertEquals(j, j2);

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene TestNumberTools.java source code file:

my book on functional programming


new blog posts


Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.