Case insensitive check if a String ends with a specified suffix. nulls are handled without exceptions. - Java java.lang

Java examples for java.lang:String End

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Description

Case insensitive check if a String ends with a specified suffix. nulls are handled without exceptions.

Demo Code

/*//w  ww  . j  a v a2s.  c om
 * 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 str = "java2s.com";
        String suffix = "java2s.com";
        System.out.println(endsWithIgnoreCase(str, suffix));
    }

    /**
     * <p>Case insensitive check if a String ends with a specified suffix.</p>
     *
     * <p><code>null</code>s are handled without exceptions. Two <code>null</code>
     * references are considered to be equal. The comparison is case insensitive.</p>
     *
     * <pre>
     * endsWithIgnoreCase(null, null)      = true
     * endsWithIgnoreCase(null, "def")     = false
     * endsWithIgnoreCase("abcdef", null)  = false
     * endsWithIgnoreCase("abcdef", "def") = true
     * endsWithIgnoreCase("ABCDEF", "def") = true
     * endsWithIgnoreCase("ABCDEF", "cde") = false
     * </pre>
     *
     * @see java.lang.String#endsWith(String)
     * @param str  the String to check, may be null
     * @param suffix the suffix to find, may be null
     * @return <code>true</code> if the String ends with the suffix, case insensitive, or
     *  both <code>null</code>
     * @since 2.4
     */
    public static boolean endsWithIgnoreCase(String str, String suffix) {
        return endsWith(str, suffix, true);
    }

    /**
     * <p>Check if a String ends with a specified suffix.</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>
     * endsWith(null, null)      = true
     * endsWith(null, "def")     = false
     * endsWith("abcdef", null)  = false
     * endsWith("abcdef", "def") = true
     * endsWith("ABCDEF", "def") = false
     * endsWith("ABCDEF", "cde") = false
     * </pre>
     *
     * @see java.lang.String#endsWith(String)
     * @param str  the String to check, may be null
     * @param suffix the suffix to find, may be null
     * @return <code>true</code> if the String ends with the suffix, case sensitive, or
     *  both <code>null</code>
     * @since 2.4
     */
    public static boolean endsWith(String str, String suffix) {
        return endsWith(str, suffix, false);
    }

    /**
     * <p>Check if a String ends with a specified suffix (optionally case insensitive).</p>
     *
     * @see java.lang.String#endsWith(String)
     * @param str  the String to check, may be null
     * @param suffix the suffix to find, may be null
     * @param ignoreCase inidicates whether the compare should ignore case
     *  (case insensitive) or not.
     * @return <code>true</code> if the String starts with the prefix or
     *  both <code>null</code>
     */
    private static boolean endsWith(String str, String suffix,
            boolean ignoreCase) {
        if (str == null || suffix == null) {
            return (str == null && suffix == null);
        }
        if (suffix.length() > str.length()) {
            return false;
        }
        int strOffset = str.length() - suffix.length();
        return str.regionMatches(ignoreCase, strOffset, suffix, 0,
                suffix.length());
    }

    /**
     * Gets a String's length or <code>0</code> if the String is <code>null</code>.
     *
     * @param str
     *            a String or <code>null</code>
     * @return String length or <code>0</code> if the String is <code>null</code>.
     * @since 2.4
     */
    public static int length(String str) {
        return str == null ? 0 : str.length();
    }
}

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