René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Code Analyzer throws Null Pointer Exception when run with no parameters","articleBody":"**Describe the bug**\n\nRunning code analyzer with no parameters produces a `java.lang.NullPointerException`\n\n**To Reproduce**\nSteps to reproduce the behavior:\n1. run: `java -jar codeanalyzer-2.3.3.jar`\n\nYou will see:\n```java\njava.lang.RuntimeException: java.lang.NullPointerException\n\tat com.ibm.cldk.CodeAnalyzer.run(CodeAnalyzer.java:124)\n\tat picocli.CommandLine.executeUserObject(CommandLine.java:1767)\n\tat picocli.CommandLine.access$900(CommandLine.java:145)\n\tat picocli.CommandLine$RunLast.handle(CommandLine.java:2139)\n\tat picocli.CommandLine$RunLast.handle(CommandLine.java:2106)\n\tat picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:1973)\n\tat picocli.CommandLine.execute(CommandLine.java:1902)\n\tat com.ibm.cldk.CodeAnalyzer.main(CodeAnalyzer.java:113)\nCaused by: java.lang.NullPointerException\n\tat java.base/java.io.File.\u003cinit\u003e(File.java:278)\n\tat com.ibm.cldk.utils.BuildProject.downloadLibraryDependencies(BuildProject.java:223)\n\tat com.ibm.cldk.CodeAnalyzer.analyze(CodeAnalyzer.java:145)\n\tat com.ibm.cldk.CodeAnalyzer.run(CodeAnalyzer.java:122)\n\t... 7 more\n```\n\n**Expected behavior**\n\nI expect code analyzer to print a nice welcome message with perhaps some help on how to use it. It could even return nothing. But throwing a NullPointer Exception should not be the default behavior.\n\n**Logs**\nIf applicable, add logs to help explain your problem.\n\n```java\njava.lang.RuntimeException: java.lang.NullPointerException\n\tat com.ibm.cldk.CodeAnalyzer.run(CodeAnalyzer.java:124)\n\tat picocli.CommandLine.executeUserObject(CommandLine.java:1767)\n\tat picocli.CommandLine.access$900(CommandLine.java:145)\n\tat picocli.CommandLine$RunLast.handle(CommandLine.java:2139)\n\tat picocli.CommandLine$RunLast.handle(CommandLine.java:2106)\n\tat picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:1973)\n\tat picocli.CommandLine.execute(CommandLine.java:1902)\n\tat com.ibm.cldk.CodeAnalyzer.main(CodeAnalyzer.java:113)\nCaused by: java.lang.NullPointerException\n\tat java.base/java.io.File.\u003cinit\u003e(File.java:278)\n\tat com.ibm.cldk.utils.BuildProject.downloadLibraryDependencies(BuildProject.java:223)\n\tat com.ibm.cldk.CodeAnalyzer.analyze(CodeAnalyzer.java:145)\n\tat com.ibm.cldk.CodeAnalyzer.run(CodeAnalyzer.java:122)\n\t... 7 more\n```\n\n**Additional context**\nAdd any other context about the problem here.\n","author":{"url":"https://github.com/rofrano","@type":"Person","name":"rofrano"},"datePublished":"2025-05-23T13:25:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/134/codeanalyzer-java/issues/134"}