Comparison between Integer and int in Java

Method 1:

Integer.parseInt(); 　　　　　　　　返回的是1个 int 的值。

Method 2:

new Integer.valueof(); 　　　　　　　  Returns the  Integer  The object. 
new Integer.valueof().intValue();　　  It returns the same thing 1 a  int  The value of the. 

Application examples of written test:

Set the following two assignment statements:

a = Integer.parseInt( " 123 " );
b = Integer.valueOf( " 123 " ).intValue();

The following statement is correct (d)

A and a are integer type variables and b is integer class object.

B and a are integer class objects, and b is an integer type variable.

C, a, and b are integer class objects and have equal values.

D, a, and b are integer type variables and have equal values.