Use replaceAll() to ignore case when replacing one substring with another : String Operation « Regular Expressions « Java

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Java » Regular Expressions » String Operation Screenshots  Use replaceAll() to ignore case when replacing one substring with another    public class Main {   public static void main(String[] argv) throws Exception {     String str = "Abc abc";     String result = str.replaceAll("(?i)abc", "DEF");     System.out.println("After replacement:\n" + "   " + result);   } } /* After replacement:    DEF DEF */             Related examples in the same category 1.  Regular expression: Split Demo 2.  Replacing String Tokenizer 3.  String replace 4.  String split 5.  Simple split 6.  Calculating Word Frequencies with Regular Expressions 7.  Print all the strings that match a given pattern from a file 8.  Quick demo of Regular Expressions substitution 9.  Parse an Apache log file with StringTokenizer 10.  StringConvenience -- demonstrate java.lang.String convenience routine 11.  Split a String into a Java Array of Strings divided by an Regular Expressions 12.  Regular Expression Replace 13.  Java Regular Expression : Split text 14.  Java Regular Expression :split 2 15.  Get all digits from a string 16.  Strip extra spaces in a XML string 17.  Remove trailing white space from a string 18.  Create a string search and replace using regex 19.  Split-up string using regular expression 20.  Apply proper uppercase and lowercase on a String 21.  Regular Expression Search and Replace Program 22.  Searching and Replacing with Nonconstant Values Using a Regular Expression 23.  Use Matcher.appendReplacement() to match [a-zA-Z]+[0-9]+ 24.  Ignore case differences when searching for or replacing substrings. 25.  Extract a substring by matching a regular expression. 26.  Match string ends 27.  Match words 28.  Match punct 29.  Match space 30.  Determining If a String Matches a Pattern Exactly 31.  Removing Duplicate Whitespace in a String 32.  Split the supplied content into lines, returning each line as an element in the returned list. 33.  Get First Found regex 34.  Get Found regex 35.  Get First Not Empty String in a String list