I couldn't run it after upgrading the Java version

Right-click on the project → "Properties"


That alone will result in an error,

Reset the library to 8 image.png

Reset compiler compliance to 8 image.png

Recommended Posts

I couldn't run it after upgrading the Java version
Try the free version of Progate [Java I]
I stumbled on the Java version in Android Studio, so I will summarize it
[Java] I implemented the combination.
I studied the constructor (java)
[Java version] The story of serialization
I tried the Java framework "Quarkus"
Don't lose to the unchecked warning! → After all, I couldn't win the unchecked warning ...
The corretto I put in Homebrew disappeared after updating, so I fixed it.
How to get the value after "_" in Windows batch like Java -version
Where can I find out about Java releases after February 2019? About the problem
I tried the new era in Java
[day: 5] I summarized the basics of Java
After understanding Docker, I actually introduced it.
[Java] I personally summarized the basic grammar.
How to install the legacy version [Java]
I went to the Java Women's Club # 1
I can't use SQS that can read the questionnaire with a scanner → I could use it after changing the java ver
I received the data of the journey (diary application) in Java and visualized it # 001
[Java] I checked it because it was erratic when converting the type. <Cast operator>
The story that I could not build after installing multiple Java on Windows
When I run the source command in the Ubuntu Makefile, it says "source: command not found"
I can't remember the text file input / output in Java, so I summarized it.
Run R from Java I want to run rJava
[Rails] I tried to raise the Rails version from 5.0 to 5.2
[Java] Access the signed URL of s3 (signed version 2)
I compared the characteristics of Java and .NET
Try the free version of Progate [Java II]
Why Java was the target language I hate
Compile and run Java on the command line
I tried to set tomcat to run the Servlet.
I want to truncate after the decimal point
I touched on the new features of Java 15
Run Dataflow, Java, streaming for the time being
I couldn't run Processing on jdk-9, so I reverted to jdk-1.8 and it worked on Eclipse OXYGEN