Compares two Strings, returning true if they are equal. : String Compare « Data Type « Java

Compares two Strings, returning true if they are equal.


 * 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
 * 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.

 * <p>Operations on {@link java.lang.String} that are
 * <code>null</code> safe.</p>

 * @see java.lang.String
 * @author <a href="">Apache Jakarta Turbine</a>
 * @author <a href="">Jon S. Stevens</a>
 * @author Daniel L. Rall
 * @author <a href="">Greg Coladonato</a>
 * @author <a href="">Ed Korthof</a>
 * @author <a href="">Rand McNeely</a>
 * @author Stephen Colebourne
 * @author <a href="">Fredrik Westermarck</a>
 * @author Holger Krauth
 * @author <a href="">Alexander Day Chaffee</a>
 * @author <a href="">Henning P. Schmiedehausen</a>
 * @author Arun Mammen Thomas
 * @author Gary Gregory
 * @author Phil Steitz
 * @author Al Chou
 * @author Michael Davey
 * @author Reuben Sivan
 * @author Chris Hyzer
 * @author Scott Johnson
 * @since 1.0
 * @version $Id: 635447 2008-03-10 06:27:09Z bayard $
public class Main {
  // Equals
   * <p>Compares two Strings, returning <code>true</code> if they are equal.</p>
   * <p><code>null</code>s are handled without exceptions. Two <code>null</code>
   * references are considered to be equal. The comparison is case sensitive.</p>
   * <pre>
   * StringUtils.equals(null, null)   = true
   * StringUtils.equals(null, "abc")  = false
   * StringUtils.equals("abc", null)  = false
   * StringUtils.equals("abc", "abc") = true
   * StringUtils.equals("abc", "ABC") = false
   * </pre>
   * @see java.lang.String#equals(Object)
   * @param str1  the first String, may be null
   * @param str2  the second String, may be null
   * @return <code>true</code> if the Strings are equal, case sensitive, or
   *  both <code>null</code>
  public static boolean equals(String str1, String str2) {
      return str1 == null ? str2 == null : str1.equals(str2);



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