Let’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 javaLet’s learn TreeMap comparator() method in java with examples. Treemap comparator() method in java with examples TreeMap comparator() method returns the comparator used to order the keys in this map, or null if this map uses the natural ordering of its keys. Let’s see example on TreeMap comparator() method for natural ordering. import java.util.Comparator; import…
Read More TreeMap comparator() method in java with examplesLet’s learn to add two matrices in java using bufferedreader. Add two matrices in java using bufferedreader Here’s addition of two matrices using bufferedreader. import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class AddTwoMatrixUsingBufferedReader { public static void main(String[] args) throws NumberFormatException, IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int a, b; int[][] arr1 =…
Read More Add two matrices in java using bufferedreaderLet’s learn what is the difference between for and for each loop in java? Difference between for and for each loop in java Here’s the difference between for loop and for-each loop in java. for loop for each loop Here in for loop we can increase counter as per our wish. Executes in a sequential…
Read More Difference between for and for each loop in javaLet’s learn java program to calculate average of 3 numbers. Java program to calculate average of 3 numbers In program to find average of 3 numbers in java we are taking input from user using nextDouble() method of Scanner class and storing in three variables number1, number2 and number3. These variables are then passed to…
Read More Java program to calculate average of 3 numbersLet’s learn how to sort an array without using sort method in java? How to sort an array without using sort method in java In the below program on how to sort an array without using sort method we are not using Arrays.sort() method to sort given array. Meanwhile we are sorting array elements in…
Read More How to sort an array without using sort method in javaLet’s learn why is string immutable in java example? Why is string immutable in java Why is string immutable? String is immutable in java because String objects are cached in string constant pool. String object once created cannot be changed i.e, when object is assigned to variable we cannot update the reference. If string object…
Read More Why is string immutable in javaLet’s learn how to sort characters alphabetically in a string in java? Sort characters alphabetically in a string in java To sort string characters alphabetically we do not have any method in String class. So we are using different methods in sorting characters alphabetically in a string. So here the first method we are applying…
Read More Sort characters alphabetically in a string in javaLet’s learn how do you reverse an array without using another array java? Reverse an array without using another array in java To reverse an array without using another array we are using for loop which loops till middle index of given array and then swap first number with the last number, swap second number…
Read More Reverse an array without using another array in javaLet’s learn how do you reverse an array in java using for loop? Reverse an array in java using for loop In the below java program first initialize given array and print given array using for loop before reversing for(int a = 0; a < arrNumbers.length; a++). In the next step to reverse given array…
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