​objc[79472]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/bin/java (0x103f414c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/jre/lib/li

objc[79472]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/bin/java (0x103f414c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x103fbb4e0). One of the two will be used. Which one is undefined.

错误: 找不到或无法加载主类 com.zhoubian.utils.Api_java_demo

解决方法：

在idea中，进行修改idea.properties

打开idea --> 工具栏Help --> Edit Custom Properties...

添加一下内容

#custom IntelliJ IDEA properties
idea_rt
idea.no.launcher=true

重启idea就可以了