Class JavaLaunchHelper is implemented in both ... libinstrument.dylib. One of the two will be used. Which one is undefined

Question

I upgraded to the latest Java 7 u40 on MacOS X and started getting the following message on the console when launching my application using Eclipse. The app works fine but I would like to find out the cause of the problem and hopefully a fix for it.

objc[10012]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.

Does anyone know why this message is printed and how to fix it?

Answer 1

⚠️ 对JetBrains IntelliJ IDEA:转到 Help -> Edit Custom Properties....如果要求您创建文件,请创建该文件.要禁用错误消息,请将以下内容粘贴到您创建的文件中:

idea_rt
idea.no.launcher=true

这将在下次重启IntelliJ时生效.

Answer 2

截至2017年10月,此问题现已解决

• jdk1.9
• jdk1.8.152
• jdk1.7.161

Answer 3

1. 从这里安装Java 7u21:http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u21-oth-JPR

2. 设置这些变量:

   export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home
   export PATH=$JAVA_HOME/bin:$PATH
   

3. 运行你的应用程序和乐趣:)

Answer 4

复制粘贴@ Lichtamberg对gotoalberto的回答的评论

适用于Java 1.8:

# in ~/.zshrc and ~/.bashrc

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_92.jdk/Contents/Home 
export PATH=$JAVA_HOME/bin:$PATH 

这解决了我在java 8上的问题.

Answer 5

不确定这是否是问题的原因,但我在安装JVM Monitor后才遇到此问题.

卸载JVM Monitor为我解决了这个问题.

Answer 6

正如其他答案所详细说明的那样，这是 JDK（最高可达 u45）中的一个错误，将在 JDK7u60 中修复 - 虽然尚未发布，但您可以从以下位置下载 b01：https: //jdk7.java.net/download。 html

它是测试版，但为我解决了这个问题。