Write a program to reverse a number in java?
How do you replace a string in java?
What is an Iterator interface?
I want to persist data of objects for later use. What’s the best approach to do so?
What is a double vs float?
What are the differences between this and super keyword?
How static variable work in java?
Does every java program need a main?
Can Applet have constructors?
What is meant by javabeans?
I have a String s = java; What is the output when I say s.replaceAll('j', 'k'); Also what is the value of s after replacing?
Which One is optimal to choose ? Syncronized hash map or Hash table with single thread model? How can a hash map syncronized with out using syncrozed blocks in programm?
Explain the reason behind ending a program with a system.exit(0)?