getting java.lang.ArrayIndexOutOfBoundsException error in groovy-CodePudding

I am getting java.lang.ArrayIndexOutOfBoundsException error in groovy while running below code.

stage('Calculate Opatch size') { 
        def files = findFiles(glob: '${BuildPathPublishRoot}\\30293915.*.zip') 
        echo """${files[0].length}"""
}

Below is the log:

java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
    at org.codehaus.groovy.runtime.dgmimpl.arrays.ObjectArrayGetAtMetaMethod.invoke(ObjectArrayGetAtMetaMethod.java:41)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)

Can someone help me to understand the error and fix it.

CodePudding user response：

The only array index access you do is in files[0]. As the Exception tells you, your array has the length 0, hence you get the error. Maybe add an empty check before accessing it?

CodePudding user response：

Your findFiles does not return an array, so there is no files[0]!