how to delete from a string java code example

Example 1: Java remove character from string

// how to remove particular character from string
public class RemoveParticularCharacter
{
   public static void main(String[] args)
   {
      String strInput = "Hello world java";
      System.out.println(removeCharacter(strInput, 6));
   }
   public static String removeCharacter(String strRemove, int r)
   {
      return strRemove.substring(0, r) + strRemove.substring(r + 1);
   }
}

Example 2: how to delete character in string java

# subString(int start, int end);

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