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This free book is an excellent tutorial book for beginners. It is a collection of notes and sample codes written by the author while he was learning Java himself. Topics are related only to the basics of Java language, and classes provided in the java.lang.* package in the Java Development Kit (JDK): array, book, bit, bitwise, byte, console, deadlock, example, J2SDK, Java, JDK, JVM, main, memory, online, operation, shift, synchronization, string, syntax, thread, tutorial