What is the function of compareto in java?
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What is the use of predicate in java 8?
how a programmer confirms that the data submitted has been succesfully inserted into the database(either oracle or my sql).. How a programmer confirm if there is any problem with the program he wrote for insertion... ANS:--- >executeupdate method is having boolean return type, if anything goes wrong in data insertion or data updation, it would return false. otherwise, if it successfully inserts data into the database, it would return true NOW HOW TO I CHECK IN MY DURING EXECUTION WHETHER IT RETURNS TRUE OR FALSE... WELL IT WILL DISPLAY ANY MESSAGE OR NOT
What is the size of string?
how many ways to create Thread and which one is good? runnable interface ot Thread class?
Who is the owner of java?
What is the full meaning of java?
What do you understand by java virtual machine?
What is the difference between static (class) method and instance method?
How to create packages in java?
What is the difference between the size and capacity of a vector?
Can a class be a super class and a sub-class at the same time? Give example.
What is a key in java?
Core Java 
