Compares two Strings, returning true if they are equal. nulls are handled without exceptions. - Java java.lang

Java examples for java.lang:String Compare

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Description

Compares two Strings, returning true if they are equal. nulls are handled without exceptions.

Demo Code

/*//  w  w  w. java2 s.c  o  m
 * Copyright 2013 Guidewire Software, Inc.
 */
/**
 * This class is based, in part, on org.apache.commons.lang.StringUtils and is intended
 * to break the dependency on that project.
 *
 * @author <a href="http://jakarta.apache.org/turbine/">Apache Jakarta Turbine</a>
 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
 * @author Daniel L. Rall
 * @author <a href="mailto:gcoladonato@yahoo.com">Greg Coladonato</a>
 * @author <a href="mailto:ed@apache.org">Ed Korthof</a>
 * @author <a href="mailto:rand_mcneely@yahoo.com">Rand McNeely</a>
 * @author Stephen Colebourne
 * @author <a href="mailto:fredrik@westermarck.com">Fredrik Westermarck</a>
 * @author Holger Krauth
 * @author <a href="mailto:alex@purpletech.com">Alexander Day Chaffee</a>
 * @author <a href="mailto:hps@intermeta.de">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
 *  Johnson

 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String str1 = "java2s.com";
        String str2 = "java2s.com";
        System.out.println(equals(str1, str2));
    }

    /**
     * <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>
     * equals(null, null)   = true
     * equals(null, "abc")  = false
     * equals("abc", null)  = false
     * equals("abc", "abc") = true
     * 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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