Strings in java

import java.util.Scanner;
public class Stringtest1
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
char letter;
System.out.println("enter character");
letter = sc.next().charAt(0);
System.out.println("Character is"+letter);
}
}

use of Integer in java

public class first
{
public static void main(String args[])
{
int a = 10;
int b = 30;
System.out.println("Additin of A And B =" +(a+b));
System.out.println("Substraciont 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));
}
}

String in put program in java

import java.util.Scanner;
public class Stringtest
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
String name, address;

System.out.println("name");
name = sc.next();
System.out.println("Address");
address = sc.next();

System.out.println("name is "+name);
System.out.println("address is"+address);
}
}

Relational Operators, Comparison Operator, Boolean operator

Relational Operators, Comparison Operator, Boolean operator

> Greater Than
< Less Than
>= Greater than Equal to
<= Less than equal to
== Equal
|= Not equal to

Addition Subtraction division and multiplication in java

import java.util.Scanner;
public class Test
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int first, second;

System.out.println("First Number");
first = sc.nextInt();
System.out.println("Second Number");

second = sc.nextInt();

System.out.println("sum of first and second number is"+(first+second));
System.out.println("Substraction of First and Second is"+(first-second));
System.out.println("division of First and Second is"+(first/second));
System.out.println("Multiplication of First and Second is"+(first*second));
}
}

import java.util.Scanner

import java.util.Scanner;
public class Test
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int a;
System.out.println("enter intergar");
a = sc.nextInt();
System.out.println("Vaue is "+a);
}
}

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");
}
}