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What is Predefined package in Java
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package
Java classes are structured in to different package based upon there functionality for example java.lang package contains classes which are essential to Java programming language e.g. Thread, Exception Error, Object etc. On the other hand package like java.util contains all utility classes e.g. Collection classes, Scanner and other utility. java.io package contains Java classes related to Input and Output functionality. java.util.concurrent also called sub package of java.util contains Concurrent utility classes like CountDownLatch, CyclicBarrier, Semaphore etc   Your Comment




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