Search for last Index Of a character in a String - Java java.lang

Java examples for java.lang:String Index

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Description

Search for last Index Of a character in a String

Demo Code

//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String string = "java2s.com";
        char value = 'o';
        int startIndex = 2;
        int count = 4;
        System.out.println(lastIndexOf(string, value, startIndex, count));
    }//from   w  w  w  .j  av  a2  s  .c  o m

    public static int lastIndexOf(String string, char value,
            int startIndex, int count) {
        int leftMost = startIndex + 1 - count;
        int rightMost = startIndex + 1;
        String substring = string.substring(leftMost, rightMost);
        int lastIndexInSubstring = substring.lastIndexOf(value);
        if (lastIndexInSubstring < 0)
            return -1;
        else
            return lastIndexInSubstring + leftMost;
    }

    public static int lastIndexOf(String string, String value,
            int startIndex, int count) {
        int leftMost = startIndex + 1 - count;
        int rightMost = startIndex + 1;
        String substring = string.substring(leftMost, rightMost);
        int lastIndexInSubstring = substring.lastIndexOf(value);
        if (lastIndexInSubstring < 0)
            return -1;
        else
            return lastIndexInSubstring + leftMost;
    }
}

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