Is void a wrapper class?

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How do you avoid global variables?

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Is it possible to write JAVA program without including any of the packages,such as "import java.io.*"; bcoz I instantly wrote a code without "import..." statement and runned the program on command Line & it worked. the code is: class Person { String name; int age; Person(String s,int a) { name = s; age = a; } accept() { System.out.println(name+"Hi!!!!!"); System.out.println(age); } } class Demo { public static void main(Strings args[])throws IOException { String name = args[0]; int age = Integer.parseInt(args[1]); Person p = new Person(name,age); p.accept(); } }

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Give me an example of array and linked list? Where they can be used?

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What are classloaders?

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what is an objects lock and which objects have locks? : Java thread

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How can we create a synchronized collection from given collection?

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Why singleton is not thread safe?

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What is unicode full form?

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What for read() function?

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Explain about main thread in java?

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There are two classes named classa and classb. Both classes are in the same package. Can a private member of classa can be accessed by an object of classb?

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