Monday 26 October 2015

40 Most Asked Java Interview Programs With Solutions

1) How to reverse a string in java? 

2) How to create a pyramid of numbers in java? 
3) How do you remove all white spaces from a string in java? 
4) How to find duplicate characters in a string in java? 
5) How do you check the equality of two arrays in java? 
6) Anagram program in java 
7) Armstrong number program in java 
8) How to find duplicate elements in an array? 
9) How to find sum of all digits of a number in java? 
10) How to find second largest number in an integer array? 
11) How to perform matrix operations in java? 
12) How to count occurrences of each character in a string in java? 
13) How to find largest number less than a given number and without a given digit? 
14) How to find all pairs of elements in an array whose sum is equal to given number? 
15) How to find continuous sub array whose sum is equal to given number? 
16) How to remove duplicate elements from ArrayList in java? 
17) How to check whether given number is binary or not? 
18) How to check whether one string is a rotation of another in java? 
19) How to find intersection of two arrays in java? 
20) How to check whether user input is number or not in java? 
21) How to find trigonometric values of an angle in java? 
22) How to reverse each word of a string in java? 
23) How to separate zeros from non-zeros in an array? 
24) Decimal To Binary, Decimal To Octal And Decimal To HexaDecimal In Java 
25) How to find all the leaders in an integer array in java? 
26) Reverse and add until you get a palindrome 
27) Selection sort in java 
28) Reverse the string with preserving the position of spaces 
29) Roman equivalent of a decimal number 
30) percentage of uppercase, lowercase, digits and special characters in a string 
31) Launch external applications through java code 
32) Find missing number in an array 
33) String immutable program 
34) Arrays.deepToString() method example. 
35) 18 Java ArrayList Programming Examples. 
36) 16 Java LinkedList Programming Examples. 
37) Detection of deadlocked threads 
38) Generate random numbers 
39) Java PriorityQueue Example. 
40) Java HashSet Example. 
41) Java LinkedHashSet Example. 
42) Java TreeSet Example