java
3 ways in Java to find the sum of Fibonacci series
3 different ways in Java to find the sum of Fibonacci series or series 0, 1, 1, 2, 3, 5, 8... of the first n elements.
ReadJava program to check if a number is special or not
Java program to check if a number is special or not. It will take one number as input from the user and print if it is a special number or not.
ReadCreate a Rectangle class in Java and calculate area, perimeter
Java program to create a Rectangle class that can calculate the area and perimeter using different methods.
ReadJava program to find special numbers in a range
Java program to find special numbers in a range. A number is called special if the sum of factorials of digits of the number is equal to itself.
ReadCan Enum implements interfaces in Java
Can Enum implements interfaces in Java or not. Enum is used to define a list of constants in Java. Learn this with an example.
Read5 Different ways to append text to a file in Java
Different ways in Java to append text or strings to a file. We will use FileOutputStream, BufferedWriter, PrintWriter, FileWriter and Files to do that.
ReadJava program to convert a boolean array to string array
Java program to convert a boolean array to string array. We will use String.valueOf and Boolean.toString methods to do the conversion.
ReadJava HashMap.merge() method explanation with examples
Java HashMap.merge() method is used to merge an item to an existing HashMap in Java. Learn how to use HashMap.merge() method with example.
ReadJava program to reverse an array without using an additional array
Java program to reverse an array without using an additional array or learn how to do in place array reverse in Java.
ReadJava program to sort array elements by frequency
Java program to sort elements of an array by frequency. This program will sort the numbers in descending order.
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