8 data types in java

8 Data Type

int 4 byte
float 4 byte
double 8 byte
char 1 byte
long 8 byte
short 4 byte
byte 1 byte
boolean 1 byte

Simple Calculation in java

public class Demo
{
public static void main(String args[])
{
int a =50;
int b = 20;
System.out.println("addition="+(a+b));
System.out.println("Substraction="+(a-b));
System.out.println("Multiplication="+(a*b));
System.out.println("Division ="+(a/b));

}
}

use of integer in java

public class first
{
public static void main(String args[])
{
int a = 10;
int b = 30;
System.out.println("Addition of A And B =" +(a+b));
System.out.println("Subtraction of A And B =" +(a-b));
System.out.println("Division of a and b ="+(a/b));
System.out.println("Multiplication of a and b =" +(a*b));
}
}

Java Simple Program

public class first
{
public static void main(String args[])
{
System.out.println("hello.\n how are you");
}
}

java basic program

public class kkk
{
public static void main(String args[])
{
System.out.println("Hello World");
}
}