Check if a String contains a special character

Question

How do you check if a String contains a special character like:

[,],{,},{,),*,|,:,>, 

Answer 1

Pattern p = Pattern.compile("[^a-z0-9 ]", Pattern.CASE_INSENSITIVE); Matcher m = p.matcher("I am a string"); boolean b = m.find();  if (b)    System.out.println("There is a special character in my string"); 

Answer 2

You can use the following code to detect special character from string.

import java.util.regex.Matcher; import java.util.regex.Pattern;  public class DetectSpecial{  public int getSpecialCharacterCount(String s) {      if (s == null || s.trim().isEmpty()) {          System.out.println("Incorrect format of string");          return 0;      }      Pattern p = Pattern.compile("[^A-Za-z0-9]");      Matcher m = p.matcher(s);     // boolean b = m.matches();      boolean b = m.find();      if (b)         System.out.println("There is a special character in my string ");      else          System.out.println("There is no special char.");      return 0;  } }