Here is a my daily learning code of java.

• Hello world in java

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

• Adding two integer.

package Luck;

public class hnn {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;
        int sum = a + b;
        System.out.println("Sum of a and b is: " + sum);
    }
}

• Check Even or Odd.

import java.util.Scanner;

public class EvenOdd {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int num = scanner.nextInt();

        if (num % 2 == 0) {
            System.out.println(num + " is even.");
        } else {
            System.out.println(num + " is odd.");
        }
        scanner.close();
    }
}

• Find the Largest of Three Numbers

import java.util.Scanner;

public class LargestNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter three numbers: ");
        int a = scanner.nextInt();
        int b = scanner.nextInt();
        int c = scanner.nextInt();

        int largest = (a > b) ? (a > c ? a : c) : (b > c ? b : c);

        System.out.println("The largest number is: " + largest);
        scanner.close();
    }
}

• Factorial of a Number

import java.util.Scanner;

public class Factorial {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int num = scanner.nextInt();
        int fact = 1;

        for (int i = 1; i <= num; i++) {
            fact *= i;
        }

        System.out.println("Factorial of " + num + " is: " + fact);
        scanner.close();
    }
}

• To find reverse.

import java.util.Scanner;

public class ReverseNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int num = scanner.nextInt();
        int reversed = 0;

        while (num != 0) {
            int digit = num % 10;
            reversed = reversed * 10 + digit;
            num /= 10;
        }

        System.out.println("Reversed number: " + reversed);
        scanner.close();
    }
}

• How to make calculator by using java.

package Luck;

import java.util.Scanner;

public class My {
    public static void main(String[] args)
    {
   Scanner value= new Scanner(System.in);


   char operator;
   int a,b;
   int result=0;
   System.out.println("Enter the operator + - * %  /");
   operator=value.next().charAt(0);
   System.out.println("Enter the value a");
   a=value.nextInt();

   System.out.println("Enter the value b");
   b=value.nextInt();


    if(operator=='+')
    {
        result=a+b;
    }
    else if(operator=='-')
    {
        result=a-b;
    }
    else if(operator=='*')
    {
        result=a*b;

  }
    else if(operator=='%')
    {
        result=a%b;
    }
    else if(operator=='/')
    {
        result=a/b;

    }
    else {
        System.out.println("Error");
    }
    System.out.println(a+ ""+ operator + ""+ b +""+"="+result);
    }

• Fibonnaci series.

import java.util.Scanner;

public class Fibonacci {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the number of terms: ");
        int n = scanner.nextInt();
        int a = 0, b = 1;

        System.out.print("Fibonacci Series: " + a + " " + b + " ");
        for (int i = 2; i < n; i++) {
            int next = a + b;
            System.out.print(next + " ");
            a = b;
            b = next;
        }
        scanner.close();
    }
}

• To find palindrome

package Luck;

import java.util.Scanner;

public class swit {
    public static void main(String[] args)
    {
        Scanner input= new Scanner(System.in);
        System.out.println("Please enter a num");
        int num=input.nextInt();
        input.close();
        int fact=1;
        int dupnum=num;
        int rev=0, rem;
        while(dupnum>0) {
            rem=dupnum % 10;
            rev=rev*10 +rem;
            dupnum/=10;
        }
        if(rev == num)
        {
        System.out.println("Palindrome " + rev);


    }
        else {
            System.out.println("not Palindrome " + rev);

        }
}
}

• OOPS in java

package Luck;

public class OOPS {
    public static void main(String[] args)
    {
//        classname objectname= new classname();
//        Animal dog = new Animal();
//        dog.id =10;
//        dog.name ="Tommy";
//        System.out.println(dog.id+ "" +dog.name);
//        
//        Animal cat = new Animal();
//        cat.id=30;
//        cat.name="smome";
//        System.out.println(cat.name);
//    }
//}
//class Animal
//        {
//        String name;
//        int id;
//        }
//    

         student cl= new student();
         cl.name="Anil";
         cl.id=1;
         cl.gender="male";
         cl.section=1;
        System.out.println("name is:" +cl.name   );
        System.out.println(cl.id);
        System.out.println(cl.gender);
        System.out.println(cl.section );
        System.out.println("\n" );
        System.out.println("\n" );



         cl.name="Aashustos";
         cl.id=2;
         cl.gender="male";
         cl.section=2;
        System.out.println(cl.name);
        System.out.println(cl.id);
        System.out.println(cl.gender);
        System.out.println(cl.section);
        System.out.println("\n" );
        System.out.println("\n" );

         cl.name="Samikshya";
         cl.id=3;
         cl.gender="female";
         cl.section=2;
        System.out.println(cl.name);
        System.out.println(cl.id);
        System.out.println(cl.gender);
        System.out.println(cl.section);

    }
}
class student{
    String name;
    int id;
    String gender;
    int section;
}