I know that based on [the Java tutorials](http://download.oracle.com/javase/tutorial/java/IandI/interfaceDef.html):

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> An interface can contain constant declarations in addition to method declarations. All constant values defined in an interface are implicitly public, static, and final. Once again, these modifiers can be omitted.
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Is it possible to make the values inside an interface to be shared and modifiable by all the classes that implement the said interface?