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To create a HashMap, use the HashMap map and new −HashMap hm = new HashMap();Now, set elements −hm.put("Finance", new Double(999.87)); hm.put("Operations", new Double(298.64)); hm.put("Marketing", new Double(39.56));Display the elements now using the following code −Example Live Demoimport java.util.*; public class Demo { public static void main(String args[]) { // Create a hash map HashMap hm = new HashMap(); // Put elements to the map hm.put("Finance", new Double(999.87)); hm.put("Operations", new ... Read More
In this program we will see how to find the gray code from an 8-bit number.Problem StatementWrite 8085 Assembly language program to convert an 8-bit number stored at 8000H to its equivalent gray code. The result will be stored at 8050H.DiscussionIn this program we are converting binary to gray code. The procedure is simple. At first we have to shift the content to the right, then perform XOR operation with the sifted content and the actual content. Thus we will get the gray code. For an example if the number is ABH, then the binary value will be (1010 1011), ... Read More
Every iPhone application needs some icons that are displayed when certain events occur, like when some new notification comes, or the icon for home screen or the icon that is displayed on spotlight.All these icons have different size properties but apart from their size there are some common properties they have. Let’s see them first.The icons should be in .png formatThe icons should be flat and should not have transparency.The images should be squared, without any round corners.For any iOS device the icons size for app store is 1024px * 1024pxOther app icon sizes are usually bases on 1x, 2x ... Read More
You can grab the current date with CURDATE() and the day before with MySQL using DATE_SUB() with INTERVAL 1 DAY. The syntax is as follows:SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);The syntax is as follows to get curdate and the day before with date_sub().SELECT *FROM yourTableName WHERE yourColumnName = CURDATE() OR yourColumnName = DATE_SUB(CURDATE(), INTERVAL 1 DAY);To understand the above syntax, let us create a table. The query to create a table is as follows:mysql> create table ProductDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> ProductName varchar(20), -> ProductOfferDate datetime, -> PRIMARY KEY(Id) -> ... Read More
To select rows where a column is null, you can use IS NULL from MySQL with the help of where clause.The syntax is as follows −select *from yourTableName where yourColumnName IS NULL;Let us first create a table to understand the concept −mysql> create table NULLDemo1 -> ( -> StudentId int, -> StudentName varchar(100) -> ); Query OK, 0 rows affected (1.48 sec)Inserting records into the table. The query to insert records is as follows −mysql> insert into NULLDemo1 values(NULL, 'John'); Query OK, 1 row affected (0.25 sec) mysql> ... Read More
A collection in Java provides an architecture to handle a group of objects. The different classes in the Java Collection Framework are ArrayList, LinkedList, HashSet, Vector etc.An Iterator can be used to iterate through a Collection and a program that demonstrates this using ArrayList is given as follows −Example Live Demoimport java.util.ArrayList; import java.util.Iterator; public class Demo { public static void main(String[] args) { ArrayList aList = new ArrayList(); aList.add("John"); aList.add("Peter"); aList.add("Harry"); aList.add("James"); aList.add("Arthur"); System.out.println("The ArrayList elements are: "); ... Read More
You can select all records that are 10 minutes within current timestamp using the following syntax−SELECT *FROM yourTableName WHERE yourColumnName > = DATE_SUB(NOW(), INTERVAL 10 MINUTE);To understand the above syntax, let us create a table. The query to create a table is as follows−mysql> create table users -> ( -> Id int NOT NULL AUTO_INCREMENT, -> UserName varchar(20), -> UserLastseen datetime, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.91 sec)Insert some records in the table using insert command. The query is as follows−mysql> insert into users(UserName, UserLastseen) values('Larry', '2019-01-15 02−45−00'); Query ... Read More
You know “youtube” right? Yes that most famous video sharing website especially in india . Most of the time, you like some videos and you try to download that video so as to check it later/offline. Then you come across “youtube-downloader” app to download youtube videos from the youtube website. But most of the apps comes with some restriction (if you are using it for free) or cost you money. But have you ever think of creating our own program to download youtube videos? If not you, then you should try as its very simply to do using the python ... Read More
Smartphones are useful for many purposes and one of the less typical use cases are digitizing documents. There are many scanning applications in Android and choosing between those applications is a tough choice. Google play store provides ‘n’ number of scanning applications with different features.In recent times many high-end mobiles have been launched which provide best camera quality which as equal an iPhone camera or DSLR camera quality. But the problem with them is we cannot convert the captured images into PDF and Word formats. We need specific converters for changing the type of image file into the desired format.The ... Read More
To set user variable from result of query in MySQL, you need to move that variable into the assignment.To understand the above concept, let us first create a table. The query to create a table is as follows −mysql> create table UserVariable -> ( -> Id int, -> Name varchar(100) -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into UserVariable values(101, 'John'); Query OK, 1 row affected (0.17 sec) mysql> insert ... Read More