Explain difference between Constructer and a method

Constructors are the special member, they do not have a return type. We can call the methods explicitly but constructors are called automatically when we create the object using the new operator. The 

What is the difference between == & .equals().

What is the difference between abstract class & Interface.

What is use of static, final variable?

 Can abstract be declared as Final?

 Can multiple catch statements be used in exceptions ?

 Can thread become a member of another thread ?

 Can we declare variables inside a method as Final Variables?

 Diff between Application and Applet ?

 Differeence between canvas class & graphics class?

A Canvas object provides access to a Graphics object via its paint() method.