We have a known corrupt jar file called saxorig.jar, but:

jar tvf saxorig.jar

...works fine.

A test program which opens the problem file as either JarFile or a ZipFile will fail:

(5.9)$ java ListJar saxorig.jar
Error accessing: saxorig.jar: java.util.zip.ZipException: error in opening zip file
java.util.zip.ZipException: error in opening zip file
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(ZipFile.java:112)
        at java.util.jar.JarFile.<init>(JarFile.java:127)
        at java.util.jar.JarFile.<init>(JarFile.java:65)
        at ListJar.main(ListJar.java:11)
        
"jar tvf" would seem like a reasonable test for corrupt Jar/Zip files, but (some) corrupt files can pass that test, yet still be unusable. "jar xvf" can even extract all the files in the case of this specific instance of a captured corrupt jar file, while the classloader and the attached test program fail to open it.
(Yes, extracting and repackaging the jar fixes the problem.)
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