Replace one string with another string with Java Regular Expressions

To replace one string with another string using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.

Declaration − The java.lang.String.replaceAll() method is declared as follows −

public String replaceAll(String regex, String replaced)  

Let us see a program to replace one string with another string using Java Regular Expressions −

Example

 Live Demo

public class Example {
   public static void main( String args[] ) {
      String str = new String("Good Harry Good");
      System.out.println( "Initial String : "+ str);
      // replacing "Good" with "Bad"
      str = str.replaceAll( "Good" , "Bad" );
      System.out.println( "The String after substitution : "+str );
   }
}

Output

Initial String : Good Harry Good
The String after substitution : Bad Harry Bad

Smita Kapse

Published on 08-Jan-2019 11:22:08

• Related Questions & Answers
• Replace all words with another string with Java Regular Expressions
• Replace String with another in java.
• Search and Replace with Java regular expressions
• Replace '*' with '^' with Java Regular Expressions
• Replace part of a string with another string in C++
• Java Program to replace one specific character with another
• Validate Phone with Java Regular Expressions
• How to extract data from a string with Python Regular Expressions?
• How to replace all occurrences of a string with another string in Python?
• Java Program to replace all occurrences of given String with new one
• MySQL Regular expressions: How to match digits in the string with \d?
• Java Program to replace only first occurrences of given String with new one
• How to replace total string if partial string matches with another string in R data frame column?
• Validate city and state with Java Regular Expressions
• Validate the ZIP code with Java Regular expressions