write a class to input 2 points by the user & check the line
maked by the points is horizontal,vertical or rectangle?
Difference between string, string builder, and string buffer?
Can an object be null?
How many bytes is 255 characters?
What are the advantages of java?
Java is Pass by Value or Pass by Reference?
What is a newline character in java?
What is casting ?
What is garbage collection? What is the process that is responsible for doing that in java?
Where the CardLayout is used?
Can we convert stringbuilder to string in java?
Is integer passed by reference in java?
What does singleton class mean?