Java - Data Types int type

Introduction

Java int data type is a 32-bit signed primitive data type.

A variable of the int data type takes 32 bits of memory.

int type valid range is -2,147,483,648 to 2,147,483,647 (-2^31 to 2^31 - 1).

All whole numbers in this range are known as integer literals (integer constants). For example, 10, -200, 0, 30, 19, 123123, etc. are integer literals of int.

An integer literal can be assigned to an int variable, say num1

int num1 = 21; 
  

Integer literals can be expressed in

• Decimal number format
• Octal number format
• Hexadecimal number format
• Binary number format

Integer class

Java has a class named Integer.

It defines two constants to represent maximum and minimum values for the int data type, Integer.MAX_VALUE and Integer.MIN_VALUE.

Demo

public class Main {
  public static void main(String[] args) {
    int max = Integer.MAX_VALUE; // Assigns maximum int value to max 
    int min = Integer.MIN_VALUE; // Assigns minimum int value to min 

    System.out.println(max);//from w  ww .ja  v a  2 s  . c o  m
    System.out.println(min);
  }
}

Result

Related Topics

• Sum Two Numbers
• Print the area of a circle
• divides two numbers
• find the average of up to 5 numbers
• Read user input and calculate the average of those numbers
• To Binary And Hexa
• Decimal To Hexadecimal
• Is year a leap year

Quiz

• Randomize Numbers In Interval
• Odd And Even Pairs
• Count Bits One in an integer
• What is the output: find the result of each expression

Exercise

• Write code to convert String To Int
• Write code to do int Reverse
• Write code to check if a string is representing an Integer value
• Write code to convert nullable Object To Integer
• Write code to Convert a string to an int value.
• Write code to Checks if a string is an integer.
• Write code to Checks if a string is a positive integer.
• Write code to generate Random Integer Id
• Write code to format int to string and pad 0 if needed
• Write code to format int with new DecimalFormat("000")
• Write code to convert int to String
• Write code to get Random between two integer values
• Write code to get Random Password in digits
• Write program to calculate and prints the rectangle's area
• Read two numbers and sum the integer between them
• Sum integers between two values using for loop
• Output 100 integer random number between two int value
• Check if two number have the same last digits

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