Data Structure
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Let us first create a collection with documents −> db.arrayContainOnlySpecificFieldDemo.insertOne( ... { ... "StudentName":"John", ... "StudentAge":21, ... "StudentTechnicalSubject":["C", "Java", "MongoDB"] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5cc4921dac184d684e3fa26a") } > db.arrayContainOnlySpecificFieldDemo.insertOne( { "StudentName":"Carol", "StudentAge":23, "StudentTechnicalSubject":["MongoDB"] } ); { "acknowledged" : true, "insertedId" : ObjectId("5cc49237ac184d684e3fa26b") }Display all documents from a collection with the help of find() method. The query is as follows −> db.arrayContainOnlySpecificFieldDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cc4921dac184d684e3fa26a"), "StudentName" : "John", "StudentAge" : 21, ... Read More
To change the JLabel foreground and background color, use the following methods:JLabel label; label.setForeground(new Color(120, 90, 40)); label.setBackground(new Color(100, 20, 70));The following is an example to change JLabel background and foreground color:Exampleimport java.awt.Color; import java.awt.Font; import javax.swing.*; import javax.swing.border.Border; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("This is demo label!", JLabel.RIGHT); label.setVerticalAlignment(JLabel.TOP); label.setFont(new Font("Verdana", Font.PLAIN, 15)); label.setForeground(new Color(120, 90, 40)); label.setBackground(new Color(100, 20, 70)); ... Read More
This example demonstrate about How to open last activity when tapping on Android notificationStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.os.Bundle ; import android.view.View ; import android.widget.Button ; public class MainActivity extends AppCompatActivity { public static ... Read More
Here we will see some good features and tricks of C++ programming language that can help us in different area. Like if we want to participate in some competitive programming events, then these tricks will help us to reduce the time for writing codes. Let us see some of these examples one by one.Checking whether a number is odd or even without using % operator. This trick is simple. We can perform bitwise AND operation with the number and 1. If the result is non-zero then this is odd, otherwise this is even. The logic is too simple. All odd ... Read More
Set an EtchedBorder from BorderFactory class −EtchedBorder etchedBorder = (EtchedBorder)BorderFactory.createEtchedBorder();Now, set it for a component −JButton button = new JButton("Etched Border"); button.setBorder(etchedBorder);The following is an example to set an EtchedBorder from BorderFactory class to a component −Examplepackage my; import java.awt.BorderLayout; import java.awt.Container; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.border.Border; import javax.swing.border.EtchedBorder; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Border raisedBorder = new EtchedBorder(EtchedBorder.RAISED); EtchedBorder etchedBorder = (EtchedBorder)BorderFactory.createEtchedBorder(); JButton raisedButton = new JButton("Raised Border"); ... Read More
For this, use the $all operator. Let us first create a collection with documents −>db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C++", "Java", "MongoDB"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd69a5f57806ebf1256f12e") } >db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["MySQL", "Java", "MongoDB"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd69ac057806ebf1256f12f") } >db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["C#", "Python", "MongoDB"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd69ad457806ebf1256f130") } >db.findDocumentExactlySameInArrayDemo.insertOne({"TechnicalSubjects":["MySQL", "C", "MongoDB"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd69adf57806ebf1256f131") }Following is the query to display all documents from a collection with the help of find() method −> db.findDocumentExactlySameInArrayDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd69a5f57806ebf1256f12e"), "TechnicalSubjects" : [ ... Read More
The max attribute of the element is used to set the maximum value for . Both min and max are used to set a range of value for input element with type number, date, datetime, range, etc. It introduced in HTML5.Let us now see an example to implement the man attribute of the element. Here, we have set max as 10, therefore a user cannot enter an ID more than 1 −Example Live Demo Log in to your account Id − Password − DOB − ... Read More
The HTML DOM input month min property returns and modify the value of the min attribute of the input field of type=”month” in an HTML document.SyntaxFollowing is the syntax −1. Returning minobject.min2. Modifying minobject.min = “YYYY-MM”Here, YYYY represent year and MM represent month like “2019-02”ExampleLet us see an example of HTML DOM input month min property − Live Demo html{ height:100%; } body{ text-align:center; color:#fff; background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat; height:100%; } ... Read More
To right align the text in a JComboBox, use the following:ComponentOrientation.RIGHT_TO_LEFTThe following is an example to right align the text in a ComboBox:Exampleimport java.awt.Component; import java.awt.ComponentOrientation; import javax.swing.DefaultListCellRenderer; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JList; public class SwingDemo extends JFrame { public SwingDemo() { JComboBox combo = new JComboBox(); combo.setRenderer(new MyListCellRenderer()); combo.addItem("One"); combo.addItem("Two"); combo.addItem("Three"); combo.addItem("Four"); combo.addItem("Five"); getContentPane().add(combo, "North"); setSize(600, 400); setDefaultCloseOperation(EXIT_ON_CLOSE); } public static void main(String[] args) { ... Read More
For JCheckBox, use the following to set tooltip text:checkBox1.setToolTipText("Sports Football"); checkBox2.setToolTipText("Sports Tennis");Tooltip text is visible whenever you will place cursor on that particular text.The following is an example. Here, we have set the tooltip text for both the sports:Exampleimport java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingDemo(){ prepareGUI(); } public static void main(String[] args){ SwingDemo swingControlDemo = new SwingDemo(); swingControlDemo.showCheckBoxDemo(); } private void prepareGUI(){ ... Read More