[jira] [Created] (LANG-1771) Incorrect output from ClassUtils.getCanonicalName when input is "[String" in version 3.18.0-SNAPSHOT

[Dianshu Liao (Jira)]

Dianshu Liao created LANG-1771:
----------------------------------

             Summary:  Incorrect output from ClassUtils.getCanonicalName when 
input is "[String" in version 3.18.0-SNAPSHOT
                 Key: LANG-1771
                 URL: https://issues.apache.org/jira/browse/LANG-1771
             Project: Commons Lang
          Issue Type: Bug
          Components: lang.*
    Affects Versions: 3.18.0
         Environment: MacOS Sequoia Version 15.3.2

JDK 8

 
            Reporter: Dianshu Liao
             Fix For: 3.18.0


In org.apache.commons.lang3.ClassUtils, the method "private static String 
getCanonicalName(String className)" produces incorrect output for certain 
malformed array class name strings.

 

Steps to Reproduce:

package org.apache.commons.lang3;

import org.apache.commons.lang3.ClassUtils;

import org.apache.commons.lang3.StringUtils;

import org.junit.Test;

import java.lang.reflect.Method;

import static org.junit.Assert.assertEquals;

 

public class testClassUtils {

 

@Test(timeout = 4000)

public void testGetCanonicalName() {

try {

// Accessing the private static method using reflection

Method method = ClassUtils.class.getDeclaredMethod("getCanonicalName", 
String.class);

method.setAccessible(true);

 

String input2 = "[String";

String expectedOutput2 = "String[]";

String actualOutput2 = (String) method.invoke(null, input2);

assertEquals(expectedOutput2, actualOutput2);

 

 

 

} catch (Exception e) {

e.printStackTrace();

}

}

 

}

 

 

Expected Result:

actualOutput2 is "String[]"

 

Actual Results:

actualOutput2 is "short[]"

 

Additional Information:

This issue seems only occurs with input "[String".

 

Other inputs like: "[I" → returns "int[]" (correct)

"Ljava.lang.String;" → returns "java.lang.String" (correct)

 

*Version Affected:* {{3.18.0-SNAPSHOT}}

 



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