Validate Email address in Java

Method to validate email entry in Java.

public static boolean isValidEmailAddress(String enteredEmail) {
       
        boolean isValid = false;
        boolean containsDot = false;
        boolean containsAt = false;
        int dotPosition = 0;
        int addPosition = 0;
        char addSign = '@';
        char dotLetter = '.';
       
        if (enteredEmail != null && !enteredEmail.isEmpty()){
            dotPosition = enteredEmail.lastIndexOf(".");
            addPosition = enteredEmail.lastIndexOf("@");
       
            if(dotPosition != -1 && addPosition != -1 && dotPosition != 0 && addPosition != 0 && dotPosition != (enteredEmail.length()-1)
                    && addPosition != (enteredEmail.length()-1) && dotPosition != (addPosition + 1)
                    && dotPosition != (addPosition -1) && addPosition != (dotPosition + 1) && addPosition != (dotPosition - 1)
                    && enteredEmail.indexOf(addPosition+1) != dotLetter && enteredEmail.indexOf(addPosition-1) != dotLetter
               
            ){
               
                isValid = true;
            }
           
       
        }
       
           
       
        return isValid;
    }

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