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I have a annoying problem with @Override annotations in Eclipse. Often when i import working projects on a new PC, Eclipse marks some of the @Override annotations as wrong. If i remove the annotations everything is fine and Eclipse also indicates that the methods are overriding the parents methods but adding the Override annotation causes the error again. I am currently working on an Android project so it might be a problem with Android and not with Eclipse..
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@Override @Override annotation informs the compiler that the element is meant to override an element declared in a superclass. Overriding methods will be discussed in Interfaces and Inheritance. While it is not required to use this annotation when overriding a method, it helps to prevent errors.
The @Override annotation indicates that the child class method is over-writing its base class method. The @Override annotation can be useful for two reasons. It extracts a warning from the compiler if the annotated method doesn't actually override anything. It can improve the readability of the source code.
The @Override annotation denotes that the child class method overrides the base class method. For two reasons, the @Override annotation is useful. If the annotated method does not actually override anything, the compiler issues a warning. It can help to make the source code more readable.
This is most likely because you are switching between Java 1.5 and Java 1.6. In 1.5 you couldn't mark interface implementations with @Override, but you can in 1.6.
A quick Google search turned up this good explanation of the difference in this annotation between the two versions: http://www.techienuggets.com/CommentDetail?tx=38155
Semantics of @Override is different in JDK 1.5 and JDK 1.6. In JDK 1.5, the @Override annotation is not allowed for implementations of methods declared in an interface, while they are allowed in JDK 1.6. For more information, see:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5008260 http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6399361 http://blogs.oracle.com/ahe/?entry=override
It is fact that the description of the Override annotation was not updated in the JDK API docs. This has been reported as a bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6501053bugdatabase/view_bug.do?bug_id=6501053
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just go to
window -> prefrences -> java -> compiler
and set it to 1.6 as notation starts from 1.6 so if compilence level will less then 1.6 it will gives error
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There are a few places where Java Compiler settings are configured.
One way is to Window->Preferences->Java->Compiler->Compiler Compliance Level -> set 1.6 or above.
Another way is right click on the Project->Properties->Java Compiler->JDK Compliance -> Select 1.6 or above.
Also You can unselect "Enable Project Specific Settings" , this will eliminate future JDK compiler compliance errors. Remove Multiple instances of JDK Versions , unless different projects need them.
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