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To create line border, use the createLineBorder() method. Let us first create a label component −JLabel label; label = new JLabel("Demo label");Now, create line border with BorderFactory class. Here, we have also set the color for the line border −label.setBorder(BorderFactory.createLineBorder(Color.yellow));The following is an example to create a LineBorder with BorderFactory class −package my; import javax.swing.BorderFactory; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("Demo label"); ... Read More
The matte border gives a “matte” look. Let’s say the following is our component −JLabel label; label = new JLabel("This has matte border!");Let us create a matte border with BorderFactory class. Here, we have given color YELLOW using the Color class −label.setBorder(BorderFactory.createMatteBorder(3, 5, 10, 5, Color.YELLOW));The following is an example to create a Matte-look border −Examplepackage my; import javax.swing.BorderFactory; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("This ... Read More
For this, use $ifNull operatorLet us first create a collection with documents −> dbquerySelectDemoinsertOne({"Value1":10, "Value2":null}); { "acknowledged" : true, "insertedId" : ObjectId("5cefc0ceef71edecf6a1f6b6") } > dbquerySelectDemoinsertOne({"Value1":null, "Value2":30}); { "acknowledged" : true, "insertedId" : ObjectId("5cefc0d7ef71edecf6a1f6b7") } > dbquerySelectDemoinsertOne({"Value1":60, "Value2":40}); { "acknowledged" : true, "insertedId" : ObjectId("5cefc0e2ef71edecf6a1f6b8") }Display all documents from a collection with the help of find() method −> dbquerySelectDemofind()pretty();Output{ "_id" : ObjectId("5cefc0ceef71edecf6a1f6b6"), "Value1" : 10, "Value2" : null } { "_id" : ObjectId("5cefc0d7ef71edecf6a1f6b7"), "Value1" : null, "Value2" : 30 } { "_id" : ObjectId("5cefc0e2ef71edecf6a1f6b8"), "Value1" : 60, ... Read More
The target attribute of the element allows you to display the response generated after submitting the form.Following is the syntax −Here, _blank is used to display the response in new window or tab, _self display the response in the same frame, _parent displays the response in the parent frame, _top displays the response in the entire body of the window, frame displays the response in a named frame.Let us now see an example to implement the target attribute of the element −Example Live Demo Points Player: Rank: Points: Submit ... Read More
A transaction is a unit of work that is performed against a database. Transactions are units or sequences of work accomplished in a logical order, whether in a manual fashion by a user or automatically by some sort of a database program.A transaction is the propagation of one or more changes to the database. For example, if you are creating a record or updating a record or deleting a record from the table, then you are performing a transaction on that table. It is important to control these transactions to ensure the data integrity and to handle database errors.Ending a ... Read More
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Name) values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name) values('David'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name) values('Bob'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Name) ... Read More
Following is a Java program to find an element in an array linearly.Example Live Demoimport java.util.Scanner; public class SearchingRecursively { public static boolean searchArray(int[] myArray, int element, int size){ if (size == 0){ return false; } if (myArray[size-1] == element){ return true; } return searchArray(myArray, element, size-1); } public static void main(String args[]){ System.out.println("Enter the required size of the array: "); Scanner s = new Scanner(System.in); int size = s.nextInt(); int myArray[] = new int [size]; System.out.println("Enter the elements of the array one by one "); for(int i=0; i
Here we will see the crbegin() and crend() functions of array in C++ STL.The array::crbegin() function is used to get reverse iterator. It returns constant reverse iterator pointing to the last element of the container. This function does not take any parameter.The array::crend() function is reverse of crbegin(). This returns the iterator which is pointing the last element of the reversed iterator.Let us see some code examples to get better idea.Example Live Demo#include #include using namespace std; main() { array arr = {00, 11, 22, 33, 44, 55, 66, 77, 88, 99}; cout
One of the most popular and considered as default library of python for image processing is Pillow. Pillow is an updated version of the Python Image Library or PIL and supports a range of simple and advanced image manipulation functionality. It is also the basis for simple image support in other Python libraries such as sciPy and Matplotlib.Installing PillowBefore we start, we need python and pillow. Incase of Linux, pillow will probably be there already, since major flavour of linux including Fedora, Debian/Ubuntu and ArchLinux includes Pillow in packages that previously contained PIL.The easiest way to install it is to ... Read More
Functions in the platform module help us probe the underlying platform’s hardware, operating system, and interpreter version information.architecture()This function queries the given executable (defaults to the Python interpreter executable) for various architecture information.>>> import platform >>> platform.architecture() ('64bit', '')machine()This function returns the machine type, e.g. 'i386'. An empty string is returned if the value cannot be determined.>>> platform.machine() 'x86_64'node()This function returns the computer’s network name.>>> platform.node() 'malhar-ubuntu'platform(aliased=0, terse=0)This function returns a single string identifying the underlying platform.>>> platform.platform() 'Linux-4.13.0-46-generic-x86_64-with-debian-stretch-sid'processor()This function returns the (real) processor name.>>> platform.processor() 'x86_64'python_build()This function returns a tuple (buildno, builddate)>>> platform.python_build() ('default', 'Oct 13 2017 12:02:49')python_compiler()This function ... Read More