Wrappers

Question 1

What do these methods take as params and what do they return?
Integer.parseInt(“123”)
and the others…

Answer 1

They return primitives
They take strings
Boolean takes “true” (ignore case) and any other string = false
They others take string with numeric characters”123”;

Question 2

What is the result?

Integer.parseInt(“a”);

Answer 2

Number Format Exception at runtime.

Should have parameter “123”