You need to use $set operator along with upsert:true. Let us first create a collection with documents −> db.updateWithUpsertDemo.insertOne({"StudentFirstName":"John", "StudentAge":21}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd2a61c345990cee87fd890") } > db.updateWithUpsertDemo.insertOne({"StudentFirstName":"Larry", "StudentAge":23}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd2a624345990cee87fd891") } > db.updateWithUpsertDemo.insertOne({"StudentFirstName":"David", "StudentAge":24}); {    "acknowledged" : ... Read More

To set the foreground color for different words, use the SimpleAttributeSet and StyleConstants class. With that, use StyledDocument class as well for different words style. For different words, use insertString().At first, create a new JTextPane -At first, create a new JTextPane: JTextPane pane = new JTextPane();Now, use the classes to ... Read More

To create a JMenuBar component, use the JMenuBar class −JMenuBar menuBar = new JMenuBar();Now, create menus inside the MenuBar −JMenu fileMenu = new JMenu("File");Add the above menu to the MenuBar −menuBar.add(fileMenu);The following is an example to create a JMenuBar Component in Java −Examplepackage my; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; ... Read More

Here we will see, how to terminate the threads in C++11. The C++11 does not have direct method to terminate the threads.The std::future can be used to the thread, and it should exit when value in future is available. If we want to send a signal to the thread, but ... Read More

Binary search is a fast search algorithm with run-time complexity of Ο(log n). This search algorithm works on the principle of divide and conquer. For this algorithm to work properly, the data collection should be in the sorted form.Binary search looks for a particular item by comparing the middle most ... Read More

Let’s say, here we are incrementing StudentScores for MongoDB which is inside StudentDetails −... "StudentScores": { ...    "StudentMathScore": 90, ...    "StudentMongoDBScore": 78 ... }Let us first create a collection with documents −> db.embeddedValueIncrementDemo.insertOne( ...    { ...       "StudentDetails": { ...          "StudentScores": ... Read More

With echo char, you can set a character that would appear whenever a user will type the password in the JPasswordField.Let us first create a new JPassword field −JPasswordField passwd = new JPasswordField();Now, use the setEchoChar() to set the echo char for password field. Here, we have asterisk (*) as ... Read More

In C++, there is no direct way to check the environment architecture. There are two Macros for Windows systems, that can be used to check the architecture. These macros are _WIN64, and _WIN32. When the system is 64-bit, then the _WIN64 will be 1, otherwise the _WIN32 will be 1. ... Read More

It is the program to print prime numbers in a given range.AlgorithmsBegin    Declare a user define datatype stl.    Declare a vector number to the stl datatype.    Declare variable a to the stl datatype.    Declare vector Prime_Number to the Boolean datatype.       Prime_Number[0] = false. ... Read More

At first, let us create a horizontal slider −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 55);Now, we will set it to move right-to-left using setInverted() −slider.setInverted(true);The following is an example to move the horizontal slider right-to-left −Examplepackage my; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JSlider; import javax.swing.WindowConstants; ... Read More