Source and listener
What do you mean by the term source and listener?
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The source is an object which produces an event. This takes place when the internal state of that object changes in a certain manner. A listener is an object which is notified whenever an event takes place. It consists of two major requirements. First, it should have been registered with a source to receive the notifications regarding specific event. Second, it should implement essential methods to receive and process such notifications.
Peer: It is a term employed of the Abstract Windowing Toolkit (AWT) to refer to the underlying classes which give the platform-specific implementation of the component classes.
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Array initializer: This is an initializer for an array. The initializer takes the position of separate creation and initialization steps. For example, the initializer
int[] pair = { 4, 2, };
Pipe: It is a linkage between the two program components. One component responds as a source of data, and writes into the pipe. The second components act as a receiver (that is, sink) for the data and reads from pipe.
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