You can customize errors and warnings for various Java coding issues.In Eclipse, go to Window > Preferences > Java > Compiler > Errors/Warnings – then you can see what you can customize:įor example, if Value of local variable is not used, you can instruct the compiler to show an error, warning, info or ignore it. Eclipse Java compiler allows customization of error and warning messagesEclipse Java compiler may produce more warnings and errors than javac, which is useful for programmers. If Eclipse uses javac, programmers will experience slow response for changes they have made, which decreases productivity.Eclipse Java compiler requires JRE to run compiled byte code, so a JRE is enough to use Eclipse IDE – JDK is not necessary. It compiles only the changes you have made (incrementally), giving fast response to programmers.In contrast, javac does not support incremental compilation. It doesn’t compile the whole project’s code. An incremental compiler automatically compiles code when changes are detected. Eclipse Java compiler is an incremental Java builderThe Java compiler built in Eclipse is a part of JDT Core component (JDT: Java Development Tool). There are some good reasons that Eclipse makes use of its own Java compiler: 1. Instead, Eclipse implements its own Java compiler – based on the Java Language Specification (JLS). If you are new to Java development with Eclipse IDE, you may be surprised that Eclipse doesn’t use javac – the Java compiler provided by JDK.
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