如何解決Mac下Class JavaLaunchHelper is implemented in both的錯誤
阿新 • • 發佈：2018-12-29
在執行程式的時候，經常會在控制檯頂部出現如下錯誤：
objc[20327]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java (0x10fc284c0) and /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x10fcfe4e0). One of the two will be used. Which one is undefined.
或者
objc[19990]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/bin/java (0x1060b54c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x1061e04e0). One of the two will be used. Which one is undefined.
雖然不影響程式的執行，但是強迫症犯了，必須解決，Google了一下，發現stactoverflower上面已經有解決方案：
附上鍊接： objc3648-class-javalaunchhelper-is-implemented-in-both
在idea中，點選Help –> Edit Custom Properties,開啟編輯配置檔案，如果從來沒編輯過則提示檔案不存在，是否建立，點建立就好了。
然後在對話視窗中輸入：
#http://stackoverflow.com/questions/43003012/objc3648-class-javalaunchhelper-is-implemented-in-both idea.no.launcher=true
然後關閉IDEA，重新開啟，再次執行後依舊發現還有這個錯誤。接著往下看發現如下回答：
I am using Intellij Idea 2017 and I got into the same problem. What solved the problem for me was to simply close the project in intelliJ File -> New -> project from existing resources use Import from external model (if any) open the project again.
那麼只需要重新匯入一下專案即可。