Question

Java Exercise

19. Given a string, if the first or last chars are 'x', return the string without those 'x' chars, and otherwise return the string unchanged.

Answer 1

//TrimX.java
public class TrimX {
    public static String trimX(String s){
        String result;
        if(s.charAt(0)=='x' && s.charAt(s.length()-1)=='x'){
            result = s.substring(1,s.length()-1);
        }
        else if(s.charAt(0)=='x'){
            result = s.substring(1);
        }
        else if(s.charAt(s.length()-1)=='x'){
            result = s.substring(0,s.length()-1);
        }
        else{
            result = s;
        }
        return result;
    }

    public static void main(String[] args) {
        System.out.println(trimX("xabcx"));
        System.out.println(trimX("xabc"));
        System.out.println(trimX("abcx"));
        System.out.println(trimX("abc"));
    }
}

public static String trimX(String s){
    String result;
    if(s.charAt(0)=='x' && s.charAt(s.length()-1)=='x'){
        result = s.substring(1,s.length()-1);
    }
    else if(s.charAt(0)=='x'){
        result = s.substring(1);
    }
    else if(s.charAt(s.length()-1)=='x'){
        result = s.substring(0,s.length()-1);
    }
    else{
        result = s;
    }
    return result;
}