Java Interview Programs

Find out duplicate number between 1 to N numbers. Find out middle index where sum of both ends are equal. Write a singleton class. Write a program to create deadlock between two threads. Write a program to reverse a string using recursive algorithm. Write a program to reverse a number. Write a program to convert decimal number to binary format. Write a program to find perfect number or not. Write a program to implement ArrayList. Write a program to find maximum repeated words from a file. Wrie a program to find out duplicate characters in a string. Write a program to find top two maximum numbers in a array. Write a program to sort a map by value. Write a program to find common elements between two arrays. How to swap two numbers without using temporary variable? Write a program to print fibonacci series. Write a program to find sum of each digit in the given number using recursion. Write a program to check the given number is a prime number or not? Write a program to find the given number is Armstrong number or not? Write a program to convert binary to decimal number. Write a program to check the given number is binary number or not? Write a program for Bubble Sort in java. Write a program for Insertion Sort in java. Write a program to implement hashcode and equals. How to get distinct elements from an array by avoiding duplicate elements? Write a program to get distinct word list from the given file. Write a program to get a line with max word count from the given file. Write a program to convert string to number without using Integer.parseInt() method. Write a program to find two lines with max characters in descending order. Write a program to find the sum of the first 1000 prime numbers. Find longest substring without repeating characters. Write a program to remove duplicates from sorted array. How to sort a Stack using a temporary Stack?