Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Let’s say we have 6 components and we need to fill the space between some of them −JButton button1 = new JButton("CSK"); JButton button2 = new JButton("DC"); JButton button3 = new JButton("MI"); JButton button4 = new JButton("SRH"); JButton button5 = new JButton("RR"); JButton button6 = new JButton("KKR");To fill the space and separate components, create a Glue using the createGlue() method −Box box = new Box(BoxLayout.X_AXIS); box.add(button1); box.add(button2); box.add(Box.createGlue()); box.add(button3); box.add(button4); box.add(Box.createGlue()); box.add(button5); box.add(button6);The following is an example to fill the space between neighbouring components −Examplepackage my; import java.awt.BorderLayout; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; public class ... Read More
Let us first create a collection with documents −>db.decrementingOperationDemo.insertOne({"ProductName":"Product-1", "ProductPrice":756}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8ae6d78f205348bc63c") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-2", "ProductPrice":890}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8b86d78f205348bc63d") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-3", "ProductPrice":994}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8c66d78f205348bc63e") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-4", "ProductPrice":1000}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8d06d78f205348bc63f") }Following is the query to display all documents from a collection with the help of find() method −> db.decrementingOperationDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd7a8ae6d78f205348bc63c"), "ProductName" : "Product-1", "ProductPrice" : 756 } { "_id" : ObjectId("5cd7a8b86d78f205348bc63d"), "ProductName" ... Read More
Java provides various datatypes to store various data values. It provides 7 primitive datatypes (stores single values) namely, boolean, byte, char, short, int, long, float, double and, reference datatypes (arrays and objects).Casting in JavaConverting one primitive data type into another is known as type casting. There are two types of casting −Widening− Converting a lower datatype to a higher datatype is known as widening. It is done implicitly.Narrowing− Converting a higher datatype to a lower datatype is known as narrowing. You need to do it explicitly using the cast operator (“( )”).Casting double to byteDouble is a higher datatype compared ... Read More
To get the vowels from a string, we have to iterate through each character of the string. Here we have to use pointers to move through the string. For this we need C style strings. If the string is pointed by str, then *str will hold the first character at the beginning. Then if str is increased, the *str will point next character and so on. If the character is in [a, e, i, o, u] or [A, E, I, O, U] then it is vowel. So we will increase the countAlgorithmcountVowels(str)begin count := 0 for each character ... Read More
The Location protocol property returns/sets a string corresponding to the protocol used for a URL. Protocol can be set to ‘file:’, ‘http:’, ‘https:’, etc..SyntaxFollowing is the syntax −Returning value of the protocol propertylocation.protocolValue of the protocol property setlocation.protocol = protocolStringExampleLet us see an example for Location protocol property − Live Demo Location protocol form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } ... Read More
To always display the scroll bar in a JList, use the properties HORIZONTAL_SCROLLBAR_ALWAYS and VERTICAL_SCROLLBAR_ALWAYS:JList list = new JList(sports); JScrollPane scrollPane = new JScrollPane(list); scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);The following is an example to create JList and display the scroll bar:Examplepackage my; import java.awt.event.*; import java.awt.*; import javax.swing.*; class SwingDemo extends JFrame { static JFrame frame; static JList list; public static void main(String[] args) { frame = new JFrame("JList Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); String sports[]= {"Tennis", "Archery", "Football", "Fencing", "Cricket", "Squash", "Hockey", "Rugby"}; list = new JList(sports); ... Read More
In C++11, the lambda was introduced. Lambdas are basically a part of code, that can be nested inside other function call statements. By combining lambda expressions with the auto keyword, they can be used later.In C++14, these lambda expressions are improved. Here we can get the generalized lambda. For example, if we want to create a lambda, that can add integers, add numbers, also concatenate strings, then we have to use this generalized lambda.Syntax of the lambda expression is looking like this:[](auto x, auto y) { return x + y; }Let us see one example to get the better idea.Example#include ... Read More
A rollback operation undoes all the changes done by the current transaction i.e. If you call a rollBack() method of the Connection interface, all the modifications are reverted until the last commit.Con.rollback()You can also rollback the changes in the database up to a particular save point by passing the required Savepoint object as a parameter to this method as −//Setting the save point con.rollback("MysavePoint");To roll back a transactionRegister the driver using the registerDriver() method of the DriverManager class as −//Registering the Driver DriverManager.registerDriver(new com.mysql.jdbc.Driver());Get the connection using the getConnection() method of the DriverManager class as −//Getting the connection String url = ... Read More
The double quotes have unicode which has the value \u0022. Let us first create a collection with documents −> db.escapingQuotesDemo.insert({ "StudentFullName": "John \u0022 Smith" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "David \u0022 Miller" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "John \u0022 Doe" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "Carol \u0022 Taylor" }); WriteResult({ "nInserted" : 1 })Following is the query to display all documents from a collection with the help of find() method −> db.escapingQuotesDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5ccf42e2dceb9a92e6aa195b"), "StudentFullName" : "John \" Smith" ... Read More
Array.entries()The Array.entries() in JavaScript is used to get a new Array that contains the key and value pairs for each index of an array. It returns an Array Iterator object with key/value pairs.syntaxarray.entries();ExampleIn the following example elements.entries() method, using for loop, access every element and generate key/value pair of the particular element.To simplify the code we just assigned an iterator variable to elements.entries()..Live Demo var elements = ["Helium", "Neon", "Krypton", "Xenon", "Radon"]; var iterator = elements.entries(); for (let e of iterator) { document.write(e); document.write(""); } Output0, ... Read More