When should I use singleton pattern?
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Can a class be declared as static?
What is a boolean used for?
What is main string [] args?
How to use string tokenizer class.
What is an accessor?
Explain method overloading and overriding?
Name the packages in JDK?
What is the use of join method?
What does escaping a character mean?
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
Explain about the security aspect of java?
What is the difference between constructor and method?