if(a.length() == 0 && b.length() == 0) return a + b; else if(a.length() == 0) return b; else if(b.length() == 0) return a; else return (a.charAt(a.length() - 1) == b ...

CodinLab is an improved version of CodingBat, providing an interactive platform for Java developers to write code and solve problems. Users can write code and see results instantly without page ...