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Lucene example source code file (English.java)

This example Lucene source code file (English.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

english, english, string, string, stringbuilder, stringbuilder

The Lucene English.java source code

package org.apache.lucene.util;

/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.
 */

/**
 * @lucene.internal
 */ 
public final class English {

  private English() {} // no instance

  public static String longToEnglish(long i) {
    StringBuilder result = new StringBuilder();
    longToEnglish(i, result);
    return result.toString();
  }

  public static void longToEnglish(long i, StringBuilder result) {
    if (i == 0) {
      result.append("zero");
      return;
    }
    if (i < 0) {
      result.append("minus ");
      i = -i;
    }
    if (i >= 1000000000000000000l) {        // quadrillion
      longToEnglish(i / 1000000000000000000l, result);
      result.append("quintillion, ");
      i = i % 1000000000000000000l;
    }
    if (i >= 1000000000000000l) {        // quadrillion
      longToEnglish(i / 1000000000000000l, result);
      result.append("quadrillion, ");
      i = i % 1000000000000000l;
    }
    if (i >= 1000000000000l) {        // trillions
      longToEnglish(i / 1000000000000l, result);
      result.append("trillion, ");
      i = i % 1000000000000l;
    }
    if (i >= 1000000000) {        // billions
      longToEnglish(i / 1000000000, result);
      result.append("billion, ");
      i = i % 1000000000;
    }
    if (i >= 1000000) {          // millions
      longToEnglish(i / 1000000, result);
      result.append("million, ");
      i = i % 1000000;
    }
    if (i >= 1000) {          // thousands
      longToEnglish(i / 1000, result);
      result.append("thousand, ");
      i = i % 1000;
    }
    if (i >= 100) {          // hundreds
      longToEnglish(i / 100, result);
      result.append("hundred ");
      i = i % 100;
    }
    //we know we are smaller here so we can cast
    if (i >= 20) {
      switch (((int) i) / 10) {
        case 9:
          result.append("ninety");
          break;
        case 8:
          result.append("eighty");
          break;
        case 7:
          result.append("seventy");
          break;
        case 6:
          result.append("sixty");
          break;
        case 5:
          result.append("fifty");
          break;
        case 4:
          result.append("forty");
          break;
        case 3:
          result.append("thirty");
          break;
        case 2:
          result.append("twenty");
          break;
      }
      i = i % 10;
      if (i == 0)
        result.append(" ");
      else
        result.append("-");
    }
    switch ((int) i) {
      case 19:
        result.append("nineteen ");
        break;
      case 18:
        result.append("eighteen ");
        break;
      case 17:
        result.append("seventeen ");
        break;
      case 16:
        result.append("sixteen ");
        break;
      case 15:
        result.append("fifteen ");
        break;
      case 14:
        result.append("fourteen ");
        break;
      case 13:
        result.append("thirteen ");
        break;
      case 12:
        result.append("twelve ");
        break;
      case 11:
        result.append("eleven ");
        break;
      case 10:
        result.append("ten ");
        break;
      case 9:
        result.append("nine ");
        break;
      case 8:
        result.append("eight ");
        break;
      case 7:
        result.append("seven ");
        break;
      case 6:
        result.append("six ");
        break;
      case 5:
        result.append("five ");
        break;
      case 4:
        result.append("four ");
        break;
      case 3:
        result.append("three ");
        break;
      case 2:
        result.append("two ");
        break;
      case 1:
        result.append("one ");
        break;
      case 0:
        result.append("");
        break;
    }
  }


  public static String intToEnglish(int i) {
    StringBuilder result = new StringBuilder();
    longToEnglish(i, result);
    return result.toString();
  }

  public static void intToEnglish(int i, StringBuilder result) {
    longToEnglish(i, result);
  }

  public static void main(String[] args) {
    System.out.println(longToEnglish(Long.parseLong(args[0])));
  }

}

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