import objectdraw.*;

/**
 * Simple examples of working with Strings.
 */
public class StringBasics extends FrameWindowController {
    
    public void begin() {
        String str = "this is a string";
        int len = str.length();
        char firstChar = str.charAt(0);
        char lastChar = str.charAt(str.length() - 1);
    }

    // Get the letter following c. Wrap around from 'z' to 'a'.
    public char nextLetter(char c) {
        if (c == 'z') {
            return 'a';
        } else {
            // Note: (c + 1) converts to an int,
            // so need to explicitly convert back to a char by
            // adding (char) -- this is called a cast.
            return (char) (c + 1);
        }
    }
    
    // Get whether c is a digit.
    public boolean isDigit(char c) {
        return (c >= '0' && c <= '9');
    }
    
    // Get the first name out of a "firstname lastname" string.
    public String getFirstName(String fullName) {
        return fullName.substring(0, fullName.indexOf(" "));
    }
    
    // Get the last name out of a "firstname lastname" string.
    public String getLastName(String fullName) {
        return fullName.substring(fullName.indexOf(" ") + 1);
    }

}