i.byteValue() method returns the value of wrapper i as a byte value. i is 257, range of byte is 

256 therefore i value exceeds byte range by 1 hence 1 is returned and stored in x.
Output:
$ javac Output.java
$ java Output
1

i.intValue() method returns the value of wrapper i as a Integer. i is 257.578 is double 

number when converted to an integer data type its value is 257.
Output:
$ javac Output.java
$ java Output
257

i.byteValue() method returns the value of wrapper i as a byte value. i is 257, range 

valueOf() returns a Boolean  instance representing the  specified  boolean value. If 

Character.isDigit(a[0]) checks for a[0], whether it is  a  digit or  not, since a[0] i:e 'a' is 

a character false is returned. a[3] is a whitespace hence Character.isWhitespace(a[3]) 

returns a true. a[2] is an upper case letter i:e 'A' hence Character.isUpperCase(a[2]) 

returns true.
Output:
$ javac Output.java
$ java Output
false true true

Character.isDigit(a[0]) checks for a[0], whether it is a digit or not, since a[0] i:e ‘a’ is a character 

false is returned. a[3] is a whitespace hence Character.isWhitespace(a[3]) returns a true. a[2] is

an upper case letter i:e ‘A’ hence Character.isUpperCase(a[2]) returns true.
Output:
$ javac Output.java
$ java Output
false true true

valueOf() returns true if the specified string contains "true" in lower or uppercase 

and false otherwise.
Output:
$ javac Output.java
$ java Output
false

Character.MIN_VALUE returns the smallest character value, which is of space character ' '. 

Output: 

$ javac Output.java 

$ java Output

i.byteValue() method returns the value of wrapper i as a byte value. i is 257, range 

of byte is 256 therefore i value exceeds byte range by 1 hence 1 is returned and 

stored in x.

Output:
$ javac Output.java
$ java Output
1

The super class of Byte class defines a constant MIN_VALUE below which a number