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As we know that Hash map in Java does not maintain insertion order either by key or by order.Also it does not maintain any other order while adding entries to it.But Java provide another API named as TreeMap which maintain its insertion order sorted according to the natural ordering of its keys.So in order to sort our given Hash map according to keys we would insert our map into a tree map which by default insert according to key sorting.After insertion we would transverse same tree map which is sorted and is our resultant sorted map.Example Live Demoimport java.util.HashMap; import java.util.TreeMap; ... Read More
The Static ModifierStatic VariablesThe static keyword is used to create variables that will exist independently of any instances created for the class. Only one copy of the static variable exists regardless of the number of instances of the class.Static variables are also known as class variables. Local variables cannot be declared static.Static MethodsThe static keyword is used to create methods that will exist independently of any instances created for the class.Static methods do not use any instance variables of any object of the class they are defined in. Static methods take all the data from parameters and compute something from ... Read More
strictfp is used to ensure that floating points operations give the same result on any platform. As floating points precision may vary from one platform to another. strictfp keyword ensures the consistency across the platforms.strictfp can be applied to class, method or on interfaces but cannot be applied to abstract methods, variable or on constructors. Following are the valid examples of strictfp usage.Examplestrictfp class Test { } strictfp interface Test { } class A { strictfp void Test() { } }ExampleFollowing are the invalid strictfp usage.class A { strictfp float a; } class A { strictfp abstract void test(); } class A { strictfp A() { } }
In Java there is no delegate library or API in order to write or read comma separated value(csv) file.So a 3rd party APIs are available for such requirements.Most popular 3rd party API is OpenCSV which is provide methods to deal with CSV file such as read csv file, write csv file, parse values of csv file, mapping of csv file values to java beans and java beans to csv file etc.In order to use/import this tool in Java project there are following approaches −Download the binaries/jars from http://sourceforge.net/projects/opencsv/Download through maven by updating pom.xml as net.sf.opencsv opencsv 2.3 ... Read More
In order to find that a given string contains all vowels we have to first convert given string into character array so that we can simplify the comparison of each character of given string.After this put each character into a hash map so that we can check whether our map created from given string contain all vowels or not.We took help of hash map here because there is no concrete method in character array class which could check that it contains all vowels or not.Only way to check is to iterate whole array and compare each character with each vowel ... Read More
To implement animation on the column-rule-color property with CSS, you can try to run the following code:ExampleLive Demo div { width: 600px; height: 300px; background: white; border: 10px solid red; animation: myanim 3s infinite; bottom: 30px; position: absolute; column-rule: 10px inset ... Read More
To implement animation on the letter-spacing property with CSS, you can try to run the following codeExampleLive Demo p { letter-spacing: 3px; animation: mymove 3s infinite; } @keyframes mymove { 70% { letter-spacing: 20px; } } I am flying!
Two sorted arrays can be merged so that a single resultant sorted array is obtained. An example of this is given as follows.Array 1 = 1 3 7 9 10 Array 2 = 2 5 8 Merged array = 1 2 3 5 7 8 9 10A program that demonstrates this is given as follows.Example Live Demopublic class Example { public static void main (String[] args) { int[] arr1 = {11, 34, 66, 75}; int n1 = arr1.length; int[] arr2 = {1, 5, 19, 50, 89, 100}; int ... Read More
You can use MONTHNAME() function from MySQL to display Month name from number. The syntax is as follows.SELECT MONTHNAME(STR_TO_DATE(yourColumnName, ’%m’)) as anyVariableName from yourTableName;To understand the above concept, let us first create a table. The query to create a table is as follows.mysql> create table MonthDemo -> ( -> MonthNum int -> ); Query OK, 0 rows affected (0.87 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into MonthDemo values(1); Query OK, 1 row affected (0.14 sec) mysql> insert into MonthDemo values(2); Query OK, 1 row affected (0.15 sec) mysql> ... Read More
Two double arrays can be compared in Java using the java.util.Arrays.equals() method. This method returns true if the arrays are equal and false otherwise. The two arrays are equal if they contain the same number of elements in the same order.A program that compares two double arrays using the Arrays.equals() method is given as follows −Example Live Demoimport java.util.Arrays; public class Demo { public static void main(String[] argv) throws Exception { boolean flag = Arrays.equals(new double[] { 7.5D, 9.2D, 1.8D }, new double[] { 7.5D, 9.2D, 1.8D }); System.out.println("The two double arrays are equal? ... Read More