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Class declaration in Java shares common aspects with C++ but there are also some syntactic and semantic differences.
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Only single inheritance is supported but aspects of multiple inheritance can be achieved in terms of the interface construct. Interface is similar to an abstract class with all methods being abstract and with all variables being static (independent of instance). Unlike classes, interfaces can be multiply-inherited.
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ClassModifiers class className [extends superClass] [implements interfaces] {
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e.g. public class Test extends Applet implements Runnable {
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defines an applet that can use threads which have methods defined by Runnable interface
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