Index of Ignorecase 

Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components. This requires the library commons-lang3-3.0.1.jar to be in classpath. The following example shows using StringUtils.indexOfIgnoreCase() API. It returns the first index of the search string in the given char sequence irrespective of the case.

File Name  :   com/bethecoder/tutorials/commons_lang/tests/strings/IndexIgnoreCaseTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.commons_lang.tests.strings; import org.apache.commons.lang3.StringUtils; public class IndexIgnoreCaseTest {   /**    * @param args    */   public static void main(String[] args) {     System.out.println(StringUtils.indexOfIgnoreCase(null, null));     System.out.println(StringUtils.indexOfIgnoreCase("DCABCABAABAAB", "ab"));     System.out.println(StringUtils.indexOfIgnoreCase("DCABCABAABAAB", "AB"));     System.out.println(StringUtils.indexOfIgnoreCase("CABCDABCDABCD", "ABC"));   } }

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