How can I replace special characters in a string in Java?

Example of removing special characters using replaceAll() method

  1. public class RemoveSpecialCharacterExample1.
  2. {
  3. public static void main(String args[])
  4. {
  5. String str= “This#string%contains^special*characters&.”;
  6. str = str.replaceAll(“[^a-zA-Z0-9]”, ” “);
  7. System.out.println(str);
  8. }

How do you replace all occurrences of a string in Java?

Java String replaceAll() example: replace word

  1. public class ReplaceAllExample2{
  2. public static void main(String args[]){
  3. String s1=”My name is Khan. My name is Bob. My name is Sonoo.”;
  4. String replaceString=s1.replaceAll(“is”,”was”);//replaces all occurrences of “is” to “was”
  5. System.out.println(replaceString);
  6. }}

What are the basic regular expression?

Literal Characters The most basic regular expression consists of a single literal character, such as a. It matches the first occurrence of that character in the string. If the string is Jack is a boy, it matches the a after the J. This regex can match the second a too.

How do you replace text in Java?

The Java string replace() method will replace a character or substring with another character or string. The syntax for the replace() method is string_name. replace(old_string, new_string) with old_string being the substring you’d like to replace and new_string being the substring that will take its place.

How do you replace a character in regex?

Find and replace text using regular expressions

  1. Press Ctrl+R to open the search and replace pane.
  2. Enter a search string in the top field and a replace string in the bottom field.
  3. When you search for a text string that contains special regex symbols, GoLand automatically escapes them with backlash \ in the search field.