Why do we need wrapper class?
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1.) if we use "private" in place of "public" in public static void main()... 2.) if we use "int" in place of "void".... 3.) can we ommit "static" keyword from that statement.... 4.) also can we give the command line arguments type as int type or float,etc.(.i.e (string args[]))
Can we create an object if a class doesn't have any constructor ( not even the default provided by constructor ) ?
Which is better stringbuilder or stringbuffer?
Explain about the security aspect of java?
What is string substring?
Can inner class have constructor?
Explain about interrupt() method of thread class ?
What is the use of keywords in java?
What are "methods" and "fields"?
What does += mean in java?
What is the difference between private & public & friendly classes?
What is a lambda expression ? What's its use ?