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Integer intValue() Method in Java

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  • Difficulty Level : Basic
  • Last Updated : 03 May, 2022

intValue() of Integer class that is present inside java.lang package is an inbuilt method in java that returns the value of this integer as an int which is inherited from Number Class. The package view is as follows:

--> java.lang Package
    --> Integer Class
         --> intValue() Method    

Syntax: 

public int intValue()

Return Type: A numeric value that is represented by the object after conversion to the integer type.

Note: This method is applicable from java version 1.2 and onwards. 

Now we will be covering different numbers such as positive, negative, decimal, and even strings.

  • For a positive integer
  • For a negative number
  • For a decimal value and string

Case 1: For a positive integer

Example:

Java




// Java Program to Illustrate
// the Usage of intValue() method
// of Integer class
 
// Importing required class/es
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
 
        // Creating object of Integer class inside main()
        Integer intobject = new Integer(68);
 
        // Returns the value of this Integer as an int
        int i = intobject.intValue();
 
        // Printing the value above stored in integer
        System.out.println("The integer Value of i = " + i);
    }
}

Output: 

The integer Value of i = 68

 

Case 2:  For a negative number

Example:

Java




// Java program to illustrate the
// use of intValue() method of
// Integer class of java.lang package
 
// Importing required classes
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
 
        // Creating an object of Integer class
        Integer intobject = new Integer(-76);
 
        // Returns the value of this Integer as an int
        int i = intobject.intValue();
 
        // Printing the integer value above stored on
        // console
        System.out.println("The integer Value of i = " + i);
    }
}

Output: 

The integer Value of i = -76

 

Case 3: For a decimal value and string. 

Example:

Java




// Java Program to illustrate
// Usage of intValue() method
// of Integer class of java.lang package
 
// Importing required classes
import java.lang.*;
 
// Main class
class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Creating an object of Integer class
        Integer intobject = new Integer(98.22);
 
        // Using intValue() method
        int i = intobject.intValue();
 
        // Printing the value stored in above integer
        // variable
        System.out.println("The integer Value of i = " + i);
 
        // Creating another object of Integer class
        Integer ab = new Integer("52");
 
        int a = ab.intValue();
 
        // This time printing the value stored in "ab"
        System.out.println("The integer Value of ab = "
                           + a);
    }
}

Output: 

Note: It returns an error message when a decimal value is given. For a string this works fine. 


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