how to remove || from string java code example

Example 1: Java remove character from string

// Java remove character from string
public class RemoveOnlyLetters
{
   public static void main(String[] args)
   {
      String strExample = "jd15352kLJJD55185716kdkLJJJ";
      System.out.println("Before: " + strExample);
      strExample = strExample.replaceAll("[a-zA-Z]", "");
      System.out.println("After: " + strExample);
   }
}

Example 2: java remove string from character

String str = "abcdDCBA123";
String strNew = str.replace("a", ""); // strNew is 'bcdDCBA123'