Example usage for org.apache.commons.lang3 CharSequenceUtils lastIndexOf

Introduction

In this page you can find the example usage for org.apache.commons.lang3 CharSequenceUtils lastIndexOf.

Prototype

static int lastIndexOf(final CharSequence cs, final CharSequence searchChar, final int start) 

Source Link

Document

Used by the lastIndexOf(CharSequence methods) as a green implementation of lastIndexOf

Usage

From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Finds the n-th index within a String, handling {@code null}.
 * This method uses {@link String#indexOf(String)} if possible.</p>
 *
 * <p>A {@code null} CharSequence will return {@code -1}.</p>
 *
 * @param str  the CharSequence to check, may be null
 * @param searchStr  the CharSequence to find, may be null
 * @param ordinal  the n-th {@code searchStr} to find
 * @param lastIndex true if lastOrdinalIndexOf() otherwise false if ordinalIndexOf()
 * @return the n-th index of the search CharSequence,
 *  {@code -1} ({@code INDEX_NOT_FOUND}) if no match or {@code null} string input
 *//*w ww .j a  v  a 2  s . co  m*/
// Shared code between ordinalIndexOf(String,String,int) and lastOrdinalIndexOf(String,String,int)
private static int ordinalIndexOf(CharSequence str, CharSequence searchStr, int ordinal, boolean lastIndex) {
    if (str == null || searchStr == null || ordinal <= 0) {
        return INDEX_NOT_FOUND;
    }
    if (searchStr.length() == 0) {
        return lastIndex ? str.length() : 0;
    }
    int found = 0;
    int index = lastIndex ? str.length() : INDEX_NOT_FOUND;
    do {
        if (lastIndex) {
            index = CharSequenceUtils.lastIndexOf(str, searchStr, index - 1);
        } else {
            index = CharSequenceUtils.indexOf(str, searchStr, index + 1);
        }
        if (index < 0) {
            return index;
        }
        found++;
    } while (found < ordinal);
    return index;
}

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From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Finds the last index within a CharSequence, handling {@code null}.
 * This method uses {@link String#lastIndexOf(int)} if possible.</p>
 *
 * <p>A {@code null} or empty ("") CharSequence will return {@code -1}.</p>
 *
 * <pre>//from   w w  w .ja  v  a 2s.  c  om
 * StringUtils.lastIndexOf(null, *)         = -1
 * StringUtils.lastIndexOf("", *)           = -1
 * StringUtils.lastIndexOf("aabaabaa", 'a') = 7
 * StringUtils.lastIndexOf("aabaabaa", 'b') = 5
 * </pre>
 *
 * @param seq  the CharSequence to check, may be null
 * @param searchChar  the character to find
 * @return the last index of the search character,
 *  -1 if no match or {@code null} string input
 * @since 2.0
 * @since 3.0 Changed signature from lastIndexOf(String, int) to lastIndexOf(CharSequence, int)
 */
public static int lastIndexOf(CharSequence seq, int searchChar) {
    if (isEmpty(seq)) {
        return INDEX_NOT_FOUND;
    }
    return CharSequenceUtils.lastIndexOf(seq, searchChar, seq.length());
}

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From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Finds the last index within a CharSequence from a start position,
 * handling {@code null}.//www .  j  a  v  a  2s. co m
 * This method uses {@link String#lastIndexOf(int, int)} if possible.</p>
 *
 * <p>A {@code null} or empty ("") CharSequence will return {@code -1}.
 * A negative start position returns {@code -1}.
 * A start position greater than the string length searches the whole string.</p>
 *
 * <pre>
 * StringUtils.lastIndexOf(null, *, *)          = -1
 * StringUtils.lastIndexOf("", *,  *)           = -1
 * StringUtils.lastIndexOf("aabaabaa", 'b', 8)  = 5
 * StringUtils.lastIndexOf("aabaabaa", 'b', 4)  = 2
 * StringUtils.lastIndexOf("aabaabaa", 'b', 0)  = -1
 * StringUtils.lastIndexOf("aabaabaa", 'b', 9)  = 5
 * StringUtils.lastIndexOf("aabaabaa", 'b', -1) = -1
 * StringUtils.lastIndexOf("aabaabaa", 'a', 0)  = 0
 * </pre>
 *
 * @param seq  the CharSequence to check, may be null
 * @param searchChar  the character to find
 * @param startPos  the start position
 * @return the last index of the search character,
 *  -1 if no match or {@code null} string input
 * @since 2.0
 * @since 3.0 Changed signature from lastIndexOf(String, int, int) to lastIndexOf(CharSequence, int, int)
 */
public static int lastIndexOf(CharSequence seq, int searchChar, int startPos) {
    if (isEmpty(seq)) {
        return INDEX_NOT_FOUND;
    }
    return CharSequenceUtils.lastIndexOf(seq, searchChar, startPos);
}

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From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Finds the last index within a CharSequence, handling {@code null}.
 * This method uses {@link String#lastIndexOf(String)} if possible.</p>
 *
 * <p>A {@code null} CharSequence will return {@code -1}.</p>
 *
 * <pre>//from  ww w .j a v  a2  s.c  om
 * StringUtils.lastIndexOf(null, *)          = -1
 * StringUtils.lastIndexOf(*, null)          = -1
 * StringUtils.lastIndexOf("", "")           = 0
 * StringUtils.lastIndexOf("aabaabaa", "a")  = 7
 * StringUtils.lastIndexOf("aabaabaa", "b")  = 5
 * StringUtils.lastIndexOf("aabaabaa", "ab") = 4
 * StringUtils.lastIndexOf("aabaabaa", "")   = 8
 * </pre>
 *
 * @param seq  the CharSequence to check, may be null
 * @param searchSeq  the CharSequence to find, may be null
 * @return the last index of the search String,
 *  -1 if no match or {@code null} string input
 * @since 2.0
 * @since 3.0 Changed signature from lastIndexOf(String, String) to lastIndexOf(CharSequence, CharSequence)
 */
public static int lastIndexOf(CharSequence seq, CharSequence searchSeq) {
    if (seq == null || searchSeq == null) {
        return INDEX_NOT_FOUND;
    }
    return CharSequenceUtils.lastIndexOf(seq, searchSeq, seq.length());
}

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From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Finds the first index within a CharSequence, handling {@code null}.
 * This method uses {@link String#lastIndexOf(String, int)} if possible.</p>
 *
 * <p>A {@code null} CharSequence will return {@code -1}.
 * A negative start position returns {@code -1}.
 * An empty ("") search CharSequence always matches unless the start position is negative.
 * A start position greater than the string length searches the whole string.</p>
 *
 * <pre>//from   w ww  .j  a v a  2s .c om
 * StringUtils.lastIndexOf(null, *, *)          = -1
 * StringUtils.lastIndexOf(*, null, *)          = -1
 * StringUtils.lastIndexOf("aabaabaa", "a", 8)  = 7
 * StringUtils.lastIndexOf("aabaabaa", "b", 8)  = 5
 * StringUtils.lastIndexOf("aabaabaa", "ab", 8) = 4
 * StringUtils.lastIndexOf("aabaabaa", "b", 9)  = 5
 * StringUtils.lastIndexOf("aabaabaa", "b", -1) = -1
 * StringUtils.lastIndexOf("aabaabaa", "a", 0)  = 0
 * StringUtils.lastIndexOf("aabaabaa", "b", 0)  = -1
 * </pre>
 *
 * @param seq  the CharSequence to check, may be null
 * @param searchSeq  the CharSequence to find, may be null
 * @param startPos  the start position, negative treated as zero
 * @return the first index of the search CharSequence,
 *  -1 if no match or {@code null} string input
 * @since 2.0
 * @since 3.0 Changed signature from lastIndexOf(String, String, int) to lastIndexOf(CharSequence, CharSequence, int)
 */
public static int lastIndexOf(CharSequence seq, CharSequence searchSeq, int startPos) {
    if (seq == null || searchSeq == null) {
        return INDEX_NOT_FOUND;
    }
    return CharSequenceUtils.lastIndexOf(seq, searchSeq, startPos);
}

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From source file:org.apache.commons.lang3.StringUtils.java

/**
 * <p>Find the latest index of any of a set of potential substrings.</p>
 *
 * <p>A {@code null} CharSequence will return {@code -1}.
 * A {@code null} search array will return {@code -1}.
 * A {@code null} or zero length search array entry will be ignored,
 * but a search array containing "" will return the length of {@code str}
 * if {@code str} is not null. This method uses {@link String#indexOf(String)} if possible</p>
 *
 * <pre>//w  w w.java2 s .com
 * StringUtils.lastIndexOfAny(null, *)                   = -1
 * StringUtils.lastIndexOfAny(*, null)                   = -1
 * StringUtils.lastIndexOfAny(*, [])                     = -1
 * StringUtils.lastIndexOfAny(*, [null])                 = -1
 * StringUtils.lastIndexOfAny("zzabyycdxx", ["ab","cd"]) = 6
 * StringUtils.lastIndexOfAny("zzabyycdxx", ["cd","ab"]) = 6
 * StringUtils.lastIndexOfAny("zzabyycdxx", ["mn","op"]) = -1
 * StringUtils.lastIndexOfAny("zzabyycdxx", ["mn","op"]) = -1
 * StringUtils.lastIndexOfAny("zzabyycdxx", ["mn",""])   = 10
 * </pre>
 *
 * @param str  the CharSequence to check, may be null
 * @param searchStrs  the CharSequences to search for, may be null
 * @return the last index of any of the CharSequences, -1 if no match
 * @since 3.0 Changed signature from lastIndexOfAny(String, String[]) to lastIndexOfAny(CharSequence, CharSequence)
 */
public static int lastIndexOfAny(CharSequence str, CharSequence... searchStrs) {
    if (str == null || searchStrs == null) {
        return INDEX_NOT_FOUND;
    }
    int sz = searchStrs.length;
    int ret = INDEX_NOT_FOUND;
    int tmp = 0;
    for (int i = 0; i < sz; i++) {
        CharSequence search = searchStrs[i];
        if (search == null) {
            continue;
        }
        tmp = CharSequenceUtils.lastIndexOf(str, search, str.length());
        if (tmp > ret) {
            ret = tmp;
        }
    }
    return ret;
}

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