Let’s learn what is a getter and setter in java? Getter and Setter in java Get and set methods are basically used in Encapsulation. Encapsulation means hiding sensitive date from user. To hide sensitive data from user we have to declare class variables as private. We all know private variables in a class can only…
Read More Getter and Setter in javaLet’s learn how to remove duplicates from arraylist in java? How to remove duplicates from ArrayList in java Here the task is to remove duplicates in Arraylist. In the below java program first get given ArrayList with duplicate integer values. Now print ArrayList with duplicate integer values on the console. Create another ArrayList ‘alNew’. Pass…
Read More How to remove duplicates from ArrayList in javaLet’s learn how do you remove duplicates in array without collections in java? How to remove duplicates from array in java without using collections To remove duplicates from array is bit tricky. Because problem with arrays is not finding duplicates, its about removing duplicates. We all know that an array is a static data structure…
Read More How to remove duplicates from array in java without using collectionsLet’s learn what’s the difference between while and do while loop in java? Difference between while and do while loop in java While loop do while loop In while loop condition is checked first and then statements are executed. In do while loop statements are executed atleast once and then condition is checked. In while…
Read More Difference between while and do while loop in javaLet’s learn java do while loop with user input. Java do while loop with user input Now let’s learn to add user input numbers and get total using do while loop. In the below program if user inputs 0, do while loop terminates the loop and finally prints the total of user input values. Here’s…
Read More Java do while loop with user inputLet’s learn how do you remove last element from arraylist in java? How to remove last element from ArrayList in java To remove last element from arraylist use two overloaded remove() method of ArrayList. They are, remove(int index): accepts the index of the element to be removed. Pass index of last element to delete last…
Read More How to remove last element from ArrayList in javaLet’s learn how do you make a 2D dynamic array in java? or to create dynamic 2D array in java. Create dynamic 2D array in java Dynamic two dimensional array is one array where user can add and remove rows and columns on need and can have varying number of rows and columns. To implement…
Read More Create Dynamic 2D array in javaLet’s learn how do you sort an ArrayList in an ArrayList in java? How to sort ArrayList in java In java, ArrayList or LinkedList class objects are stored in unordered way. So to sort an ArrayList we are using Collections.sort() and reverseOrder() method. In this post we are going to sort arraylist in java in…
Read More How to sort ArrayList in javaLet’s learn how do you sort in descending order in TreeSet in java? How to sort TreeSet in descending order in java In this post lets sort TreeSet elements in descending order or decreasing order. For this we are using descendingSet() method. This method returns a reverse order view of the elements contained in this…
Read More How to sort TreeSet in descending order in javaLet’s learn can we sort TreeMap by values in java? TreeMap sort by values in java TreeMap stores key-value pairs which are in sorted order based on key. To sort a treemap by value we have to build some logic using comparator class. Here’s an example on how to sort a treemap by value. import…
Read More TreeMap sort by values in java