Top 30 Java Interview Programs

1. Program to reverse a String in Java .

2. Program to print Fibonacci series in java.

3.Program to print Fibonacci series in java using recursive method .

4.Program in java to find a String in a sentence.

5. Program to count no.of times a word repeats in String in Java

6. Program to find Prime number in java

7. Program to remove a particular character from a sentence

8. Count the Number of Vowels in Java String

9. Find the substring count from a string without string functions in java

10. Program in java to split String without using split() method

11. Program in java to check whether a String is palindrome or not

12. Program to find largest and smallest numbers among N numbers using an array

13 . How to remove duplicate characters from String in Java.

14. Program for Shifting character in a String eg. String "abcde" should be printed as "eabcd"

15. Program to find  Position of a String in another String.

16. How to sort and reverse an array list without using sort method

17. How to find first non-repeated character of a string in Java.

18. Bubble Sort in Java

19. How to find duplicate numbers in list in Java (using Collection)

20. How to Print numbers for 1 to 100 without using for Loop

21. Java program to find smallest substring in specified characters

22. Write a program to find out all possible unique subString present in a given string

23. How To Count Occurrences Of Each Character In String In Java

24. How to reverse a String using recursion

25. Equilibrium index of an array

26. Java Program to print numbers in pyramid shape

27. Java Program To Remove Duplicate Elements From ArrayList without using Collections

28. Java Program To find factorial of a number .

29. Java Program to find two highest number in an array 

30. How to remove duplicate characters from String in Java.

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Find top two highest numbers in a array java

• Hi Friends today we will discuss about how to find top two maximum numbers in an array using java program.
• For this we have written separate function to perform logic
• findTwoMaxNumbers method takes integer  array as an argument
• Initially take two variables to find top to numbers and assign to zero.
• By using for each loop iterating array and compare current value with these values
• If our value is less than current array value then assign current value to max1 
• And assign maxone to maxtwo because maxtwo should be second highest.
• After completion of all iterations maxone will have top value and maxtwo will have second maximum value.
• Print first maximum and second maximum values.
• So from main method create array and pass to findTwoMaxNumbers(int [] ar)

package com.javainhouse; public class FindTopTwo { public void findTwoMaxNumbers(int[] array){ int maxOne = 0; int maxTwo = 0; for(int i:array){ if(maxOne < i){ maxTwo = maxOne; maxOne =i; } else if(maxTwo < i){ maxTwo = i; } } System.out.println("First Maximum Number: "+maxOne); System.out.println("Second Maximum Number: "+maxTwo); } public static void main(String a[]){ int num[] = {4,23,67,1,76,1,98,13}; FindTopTwo obj = new FindTopTwo(); obj.findTwoMaxNumbers(num); obj.findTwoMaxNumbers(new int[]{4,5,6,90,1}); }

Output:

First Maximum Number: 98 Second Maximum Number: 76 First Maximum Number: 90 Second Maximum Number: 6

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