java string remove character

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

                                    // 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);
   }
}

                                    // remove last character from string in java
public class SubstringDemo
{
   public static void main(String[] args)
   {
      String strInput = "Flower Brackets!";
      String strOutput = strInput.substring(0, strInput.length() - 1);
      System.out.println(strOutput);
   }
}

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

                                    # subString(int start, int end);

String a = "Hello!";
b = a.subString(0,a.length()-1) #Remove the last String
# b should be "Hello" then