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- public String revString(String stringToRev) {
- if( stringToRev == null)
- throw new IllegalArgumentException("Failed precondition: revString. parameter may not be null.");
- String temp = "";
- if (stringToRev.length() == 1)
- return stringToRev;
- return revString (stringToRev.substring(1)) + stringToRev.charAt(0);
- }
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