Java Regex Remove Special Characters

You can use the replaceAll() method with regular expressions to remove special characters. Here is an example code:

String input = "ab$cd&ef^gh";
String output = input.replaceAll("[^a-zA-Z0-9]", "");

System.out.println(output);

The output results are:

abcdefgh

The regular expression “^[a-zA-Z0-9]” here signifies any character except letters and numbers, replacing these special characters with an empty string to achieve the removal of special characters.