28 lines
847 B
Java
28 lines
847 B
Java
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// verifying/StringInverter3.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// {java StringInverterTest StringInverter3}
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import static java.lang.Character.*;
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public class StringInverter3 implements StringInverter {
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public String invert(String str) {
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if(str.length() > 25)
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throw new RuntimeException("argument too long!");
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String result = "";
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for(int i = 0; i < str.length(); i++) {
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char c = str.charAt(i);
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result += isUpperCase(c) ?
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toLowerCase(c) :
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toUpperCase(c);
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}
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return result;
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}
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}
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/* Output:
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StringInverter3 has 1 FAILURES:
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Failure 1:
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allowedCharacters_Fail(StringInverterTest)
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Expected exception: java.lang.RuntimeException
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*/
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