/** * * @param str: assume it contains at least one character * @return the last character in the String */ public char getLastChar(String str) { return 0; //'a' used as default value (to be completed) }

/** * * @param str: assume it contains at least one character * @return the String with the first character removed */ public String getWithoutFirstChar(String str) { return ""; //to be completed } /** * * @param str: assume it contains at least one character * @return the String with the last character removed */ public String getWithoutLastChar(String str) { return ""; //to be completed }