In this article, we will discuss Java compiler compliance level issue in Eclipse IDE

1. Java compiler compliance level issue

• Sometimes, when we work on Eclipse IDE then there is possibly that we might get compiler compliance level issue
• Reason: this is because of difference in installed JRE which is used for compilation and compiler compliance level set for respective project
• Let us see one issue with screen-capture from Eclipse IDE

In the above example,

• We have used generics which is introduced in Java 1.5 version
• Also, installed JRE for this project is set to Java 1.6 version
• But still compile-time error is thrown stating “Change project compliance and JRE to 1.5”
• Solution: go to Project Properties and check Java Compiler compliance level
• If it is set to a lower version, then change it to a required version and compile again

2. Path to go to Project Properties:

• Right click on Project –> click Properties –> Java Compiler –> Change Compiler compliance level to required level
• For example, Java 1.6 version for this case to work

• Select 1.6 version from drop-down list and click Apply
• When Apply is clicked, then dialog box will appear with message/information “The compiler settings have changed. A rebuild of the project is required for changes to take effect. Build the project now?“
• Click Yes and finally OK

All issues related to compiler compliance level will be resolved now

3. Useful Eclipse IDE shortcuts :

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• Eclipse IDE – How to open editor using CTRL + E ?
• Eclipse IDE – Java compiler compliance level issue

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Happy Coding !!
Happy Learning !!