Complete Collection Of Java Programs For Interviews

1) Java Program To Find Biggest Number Between N Numbers 

2) Java Program To Find Largest and Smallest Number

3) Java program to find largest of three numbers

4) Java Program To Check whether string is palindrome or not

5) Java Program for Fibonacci series using recursion in java

6) Java Program to implement QuickSort Algorithm

7) Java Program To Reverse a Number

8) Java Program For Insertion Sort

9) Java program to find perfect number or not.

10) Java program to reverse a string using recursive algorithm

11) Java program to implement ArrayList

12) Java Program For Bubble Sort

13) How to identify a given positive decimal number as even/odd without using % or / operator ? 

14) Java Program for Palindrome of String or reverse a String.

15) Java Program To Check if a number is Armstrong or not

16) Java Program To Check a number is prime or not

17) Java Program on How to get the prime numbers between a given range.

18) Java Program To Find Factorial of a number

19) Java Program to Swap Numbers without using 3rd variable

20) Java Program To Verify a number is Even/Odd

21) Java Program on String Reverse

22) Program to find out shortest palindrome of given string

23) Program to print prime numbers in java

24) Write a Java Program To Print Fibonacci Series In Java

25) Java Program To Find Largest and Smallest Number in an Array

JAVA PROGRAM TO FIND BIGGEST NUMBER BETWEEN N NUMBER

import java.util.Scanner;

class group{
public static void main(String argn[]){
Scanner data = new Scanner(System.in);
int num, i, temp, max;
// Reading numbers want to be read 
System.out.print("Enter number you want to enter:");
num = data.nextInt();
System.out.println("Enter " +num+ " number");
// Reading 1st number
max = data.nextInt();
// Reading other number
for (i=1; i < num; i++) { temp = data.nextInt();
 if(temp < max)
continue;
else
// largest number
max = temp;
}
System.out.println("Largest Number is "+max);
}
}

Output:-

Enter number you want to enter:
10
Enter 10 number
248
445852
248
215
25854
2145
11458
21145
115
115585
Largest Number is 445852

Java Program To Find Largest and Smallest Number in an Array

1. public class FindLargestSmallestNumber {
2.  
3.         public static void main(String[] args) {
4.                
5.                 //array of 10 numbers
6.                 int numbers[] = new int[]{32,43,53,54,32,65,63,98,43,23};
7.                
8.                 //assign first element of an array to largest and smallest
9.                 int smallest = numbers[0];
10.                 int largetst = numbers[0];
11.                
12.                 for(int i=1; i< numbers.length; i++)
13.                 {
14.                         if(numbers[i] > largetst)
15.                                 largetst = numbers[i];
16.                         else if (numbers[i] < smallest)
17.                                 smallest = numbers[i];
18.                        
19.                 }
20.                
21.                 System.out.println("Largest Number is : " + largetst);
22.                 System.out.println("Smallest Number is : " + smallest);
23.         }
24. }
25.  
26. /*
27. Output of this program would be
28. Largest Number is : 98
29. Smallest Number is : 23
30. */

Java Program To Find Largest and Smallest Number

public static void main(String[] args) {
    int smallest = 0;
    int large = 0;
    int num;
    System.out.println("enter the number");//how many number you want to enter
    Scanner input = new Scanner(System.in);
    int n = input.nextInt();
    num = input.nextInt();
    smallest = num; //assume first entered number as small one
    // i starts from 2 because we already took one num value
    for (int i = 2; i < n; i++) {
        num = input.nextInt();
        //comparing each time entered number with large one
        if (num > large) {
            large = num;
        }
        //comparing each time entered number with smallest one
        if (num < smallest) {
            smallest = num;
        }
    }
    System.out.println("the largest is:" + large);
    System.out.println("Smallest no is : " + smallest);
}

Java program to find largest of three numbers

import java.util.Scanner;
 
class LargestOfThreeNumbers
{
   public static void main(String args[])
   {
      int x, y, z;
      System.out.println("Enter three integers ");
      Scanner in = new Scanner(System.in);
 
      x = in.nextInt();
      y = in.nextInt();
      z = in.nextInt();
 
      if ( x > y && x > z )
         System.out.println("First number is largest.");
      else if ( y > x && y > z )
         System.out.println("Second number is largest.");
      else if ( z > x && z > y )
         System.out.println("Third number is largest.");
      else   
         System.out.println("Entered numbers are not distinct.");
   }
}

Java Program To Check whether string is palindrome or not

import java.util.Scanner;

public class Palindrome {

public static void main(String[] args)

{

 System.out.println("Please Enter a number : ");

        int givennumber = new Scanner(System.in).nextInt();

        int number=givennumber;

        int reverse=0;

        while (number != 0) {

            int remainder = number % 10;

            reverse = reverse * 10 + remainder;

            number = number / 10;

        }            

 if(givennumber == reverse)

   System.out.println("Result:Palindrome");

    else

    System.out.println("Result:Not Palindrome");

    }

}

Java Program for Fibonacci series using recursion in java

  public class FibanacciRecursive {
 public void fibanci(int n1,int n2){
  int sum=0;
  if(n1==0){
  System.out.println(n1+"\n"+n2);
  }
  sum=n1+n2;
  if(sum<=100){
   System.out.println(sum);
   n1=n2;
   n2=sum;
  
   fibanci(n1,n2);
  
  }
 }
 
 public static void main(String[] args) {
 
      FibanacciRecursive fb=new FibanacciRecursive();
      fb.fibanci(0,1);
 }

}

Output:

0

1

1

2

3

5

8

13

21

34

55

89