Methods of Wrapper Class

Give the output of the following code:

String P = “20”, Q = “19”,
int a = Integer .parselnt(P);
int b = Integer. valueOf(Q);
System.out.println(a+””+b);

State the data type and value of res after the following is executed:
char ch = ‘t’;
res=Character. toUpperCase(ch);

Differentiate between if else if and switch-case statements.

Write the memory capacity (storage size) of short and float data type in bytes.

State the number of bytes occupied by char and int data types.

State the data type and value of res after the following is executed :

char ch = ‘9’;
res = Character. isDigit(ch)

Write a difference between the functions isUpperCase( ) and toUpperCase( ).

(i) int res = ‘A’; 

What is the value of res?

(ii) Name the package that contains wrapper classes.