Java lab programs
Java basic programs
1.Write a java program to add two numbers
public class Add
{
public static void main(String arg[])
int num1=5, num2= 3, sum;
sum =num1+num2;
System.out.println("The addition of two numbers is:" +sum);
}
}
output:
The addition of two numbers is 8
2.Write a java program to find the number even or odd.
import java.util.Scanner;
class Evenodd
{
public static void main(string args[])
{
int =num;
system.outprintln("Enter the number:" );
scanner input = new scanner (system.in)
num= input.nextInt();
if (num %2 =0)
system.out.println("The number is even:");
else
system.out.println("The number is odd:");
}
}
output:
Enter the number: 10
The number is even
Enter the number:9
The number is odd
3.Write a java program to perform all arithmetic operations.
import java.util.scanner;
public class Arith
{
public static void main (String args[]);
scanner in =new.scanner (system.in);
system.out.println("Enter first number:");
int num1= in.nextInt();
system.out.print("Enter second number:");
int num2= in.nextInt();
int sum=num1+num2;
int sub=num1-num2;
int product =num1*num2;
int division =num1/num2;
system.out.println("sum:" +sum);
system.out.println("sub:" +sub);
system.out.print("product:" +product);
system.out..println("division:" +division);
}
}
output:
Enter first number:10
Enter second number:5
sum:15
sub:5
product:50
division:2
4.Write a java program to find the largest number.
public class Largest
{
public static void main (String args[]);
{
int num1=5,num2=4,num3=10,sum;
if (num1 >= num2 && num1>=num3)
system.out.println(num1 +"is the greatest number")
else if (num2>=num1 && num2>=num3)
system.out.println(num2 +" is the greatest number")
else
system.out.println(num3 +" is the greates number")
}
}
output:
10 is the largest number
5.Write a java program to find the year is leap year or not.
import java.util.scanner;
public class Leapyear
{
public static void main (String args[])
int year;
scanner scan =new scanner(system.in);
system.ou.println("Enter the year:");
year=scan.nextInt();
scan.close();
boolean isLeap = false;
if (year%4 == 0)
{
if (year %100 == 0)
{
if (year %400 ==0)
isLeap = true;
else
{
isLeap =true;
}
else
isleap=false;
}
if(isLeap=true)
system.out.println (year +"is a leap year");
else
System.out.println(year +:is not a leap year");
}
}
output:
Enter the year:
2005
is not a leap year
6.Write a java program to add two strings
class StringConcatenation
{
public static void main(String args[])
{
string s="Sachin" + "tendulkar";
system.out.println(s);
}
}
output:
Sachin tendulkar
7.Write a program to swap two numbers using temporary variable
public class Swap
{
public static void main(String args[])
{
float first =1.20f,second =2.45f;
system.out.println("Before swap");
system.out.println("First number:"+first);
system.out.println("Second number:"+second);
float temproary =first;
first=second;
second=temproary;
system.out.println("After swap")
sytem.out.println("First number=" +first)
system.out.println("Second number=" +second)
}
}
output:
Before swap
First number =1.2
Second number =2.45
After swap
First number =2.45
Second number=1.2
8.Write a java program to swap two number without using temparory variable
public class Swapnum
{
public static void main(String args[]);
{
float first =12.0f,second =24.5f;
system.out.println("Before swap");
system.out.println("First number:"+first);
system.out.println("Second number:"+second);
first = first - second;
second =first +second;
first = second - first;
system.out.println("After swap")
sytem.out.println("First number=" +first)
system.out.println("Second number=" +second)
}
}
output:
Before swap
First number =12.0
second number= 24.5
After swap
First number =24.5
9.Write a java program to calculate simple interest
import java.util.scanner;
public class SimpleInterest
{
public static void main(String args[]);
{
float p,n,r,simple interest;
scanner input = new scanner (system.in)
sytem.out.println("Enter the pricipal:");
p=scan.nextFloat();
sytem.out.println("Enter rate of interest:");
r=scan.nextFloat();
sytem.out.println("Enter the time period:");
t=scan.nextFloat();
scan.close();
sytem.out.println("simple interest is"+sinterest);
}
}
output:
Enter the principal:2000
Enter the rate of interest:6
Enter the time period:3
simple interest:360.0
10.Write a java program to calculate compound interest
public class Compound
{
public void calculate(int p, int t ,double r , int n)
{
double amount =p*Math.pow(1+(r/n),n*t);
double cinterest=amount-p;
sytem.out.println("Compound interest after years" +t+ "years" +cinterest);
sytem.out.println("Amount after " +t+ "years"+ amount);
public static void main(String args[]);
Compound obj =new Compund();
obj.calculate(2000,5,.08,12);
}
}
output:
Compound interest after 5 years:979.69
Amount after 5 years:2979.69
content: Education
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