1. Given a list of integers, find out all the even numbers that exist in the list using Stream functions? By Java 8

 

Description:

Given a list of integers, find out all the even numbers that exist in the list using Stream functions?

Code:

? 1 2 3 4 5 import java.util.*; import java.util.stream.*; public class EvenNumber { public static void main(String args[]) { List<Integer> list = Arrays.asList(10, 15, 8, 49, 25, 98, 32); list.stream().filter(n -> n % 2 == 0).forEach(System.out::println); }

Output: 10, 8, 98, 32

Java Interview Programs And solutions List for experiences in 2023.

Latest java interview Questions and Solution.

In this section, we are giving few java interview programs faced by some of my friends. If you come across any questions, post it to me. I can provide solutions.

1. List of All Interviw Program.
   1. How to find Reverse Sting in java.
2. 2. Count occurrences of character in string java using hashmap.
3. 3.How to print all map values in java.
4. 4.How to remove duplicate Characters from a String in java.
5. 5.How to find armstrong number in java.
6. 6.Write a Program to find ASCII values in java.
7. 7. How to check Even OR Odd using scanner in java.
8. 8.Factorial program in java.
9. 9.Program to print Fibonacci Series using for loop in java.
10. 10. FizzBuzz Program in Java - Interview Question
11. 11. Palindrome program in java.
12. 12. Swapping of two Numbers in java without third variable.
13. 13. Example of Java Serialization.
14. 14.Example of Java Deserialization .

Example of Java Deserialization .

Code:

? 1 2 3 4 5 6 7 import java.io.*; class Depersist{ public static void main(String args[])throws Exception{ ObjectInputStream in=new ObjectInputStream(new FileInputStream("f.txt")); Student s=(Student)in.readObject(); System.out.println(s.id+" "+s.name); in.close(); } }

Output:: 211 govind

Example of Java Serialization.

Description:

In this example, we are going to serialize the object of Student class. The writeObject() method of ObjectOutputStream class provides the functionality to serialize the object. We are saving the state of the object in the file named f.txt.

Code:

? 1 2 3 4 5 6 7 import java.io.*; class Persist{ public static void main(String args[])throws Exception{ Student s1 =new Student(211,"govind"); FileOutputStream fout=new FileOutputStream("f.txt"); ObjectOutputStream out=new ObjectOutputStream(fout); out.writeObject(s1); out.flush(); System.out.println("success"); } }

Output:: success

12. Swapping of two Numbers in java without third variable.

Description:

Write a sample code to Swapping of two Numbers in java without third variable.

Code:

? 1 2 3 4 5 6 7 8 9 10 import java.util.Scanner; public class Swapping_Number { public static void main(String[] args) { int x,y; System.out.println("Enter x and y no: "); Scanner s=new Scanner(System.in); x=s.nextInt(); y=s.nextInt(); System.out.println("Before Swaping \n x="+x+"\n y="+y); x=x+y; y=x-y; x=x-y; System.out.println("After Swaping\n x="+x+"\n y="+y); } }

Output:

Enter x and y no: 10 20 Before Swaping x=10 y=20 After Swaping x=20 y=10

11. Palindrome program in java.

Description:

Write a sample code to Palindrome in java.

Code:

? 1 2 3 4 5 6 7 8 9 import java.util.Scanner; class Palindrome { public static void main(String args[]) { String original, reverse = ""; Scanner in = new Scanner(System.in); System.out.println("Enter a string to check :"); original = in.nextLine(); int length = original.length(); for (int i = length - 1; i >= 0; i--) reverse = reverse + original.charAt(i); if (original.equals(reverse)) System.out.println("The string is a palindrome."); else System.out.println("The string isn't a palindrome."); } }

Output:

Enter a string to check : madam The string is a palindrome. Enter a string to check : godblessgovind The string isn't a palindrome.

10. FizzBuzz Program in Java - Interview Question

Description:

Write a sample code to FizzBuzz Program in Java.

Code:

? 1 2 3 4 5 6 7 8 9 import java.util.Scanner; public class FizzBuzz { public static void main(String[] args) { for(int i=1; i<=15; i++) { Scanner s=new Scanner(System.in); if(i%(3*5)==0)System.out.println("fizzBuzz"); else if (i% 5 ==0) System.out.println("fizz"); else if (i% 3==0)System.out.println("Buzz"); else System.out.println(i); } } }

Output:

1 2 Buzz 4 fizz Buzz 7 8 Buzz fizz 11 Buzz 13 14 fizzBuzz