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Articles by Anvi Jain
Page 17 of 43
Display tick marks in a JSlider with Java
To display tick marks in a JSlider, you need to use the setPaintTicks() method and set it to TRUE −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 75); slider.setPaintTicks(true);The following is an example to display tick marks in a slider in Java −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; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Frame with Slider"); JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 75); slider.setMinorTickSpacing(5); slider.setMajorTickSpacing(20); slider.setPaintTicks(true); ...
Read MoreMongoDB query to remove array elements from a document?
Use the $pull to remove array elements from a MongoDB document as shown in the following syntax −db.yourCollectionName.update( { }, { $pull: { yourFieldName: yourValue }}, {multi:true });Let us first create a collection with documents −>db.removeArrayElementsDemo.insertOne({"AllPlayerName":["John", "Sam", "Carol", "David"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd90d011a844af18acdffc1") } >db.removeArrayElementsDemo.insertOne({"AllPlayerName":["Chris", "Robert", "John", "Mike"]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd90d2e1a844af18acdffc2") }Following is the query to display all documents from a collection with the help of find() method −> db.removeArrayElementsDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd90d011a844af18acdffc1"), "AllPlayerName" : [ "John", ...
Read MoreCan we save content from JTextField to a file in Java?
Yes, we can save the content to a file with FileWriter class. Set a JTextFile component as shown below −JTextField emailId = new JTextField(20); emailId.setText("abc@example.com");Set the file location from to where you want to save the content from the JTextField −String file = "E:ew.txt";Now, with FileWriter, save the content −FileWriter fileWriter = new FileWriter(file); emailId.write(fileWriter); fileWriter.close();The following is an example to save content from JTextFile to a file. Here, we are saving the text from JTextField to a file at location: “E:ew.txt” −Examplepackage my; import java.awt.FlowLayout; import java.io.FileWriter; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { ...
Read Morepthread_cancel() in C
The threa_cancel() is used to cancel one particular thread by the thread id. This function sends one cancellation request to the thread for termination. The syntax of the pthread_cancel() is like below −int pthread_cancel(pthread_t th);Now, let us see how to cancel threads using this function.Example#include #include #include #include int count = 0; pthread_t sample_thread; void* thread_one_func(void* p) { while (1) { printf("This is thread 1"); sleep(1); // wait for 1 seconds count++; if (count == 5) { //if the ...
Read MorePerforming distinct on multiple fields in MongoDB?
You can use $group operator along with aggregate framework to perform distinct on multiple fields. Let us first create a collection with documents −> db.distinctOnMultipleFieldsDemo.insertOne( ... { ... "StudentFirstName" : "Chris", ... "StudentAge" : 21, ... "StudentCountryName": "US" ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5cd2e518b64f4b851c3a13d7") } > db.distinctOnMultipleFieldsDemo.insertOne( ... { ... "StudentFirstName" : "Robert", ... "StudentAge" : 21, ... "StudentCountryName": "AUS" ... } ... ); { "acknowledged" : true, "insertedId" ...
Read MoreHow to store MongoDB result in an array?
To store MongoDB result in an array, use the toArray() method −var anyVariableName=db.yourCollectionName.find().toArray();Let us first create a collection with documents −> db.mongoDbResultInArrayDemo.insertOne({"CustomerName":"David Miller", "CustomerAge":24, "isMarried":false}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99bd5b50a6c6dd317ad92") } > db.mongoDbResultInArrayDemo.insertOne({"CustomerName":"Sam Williams", "CustomerAge":46, "isMarried":true}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99beab50a6c6dd317ad93") } > db.mongoDbResultInArrayDemo.insertOne({"CustomerName":"Carol Taylor", "CustomerAge":23, "isMarried":false}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99bf9b50a6c6dd317ad94") }Following is the query to display all documents from a collection with the help of find() method −> db.mongoDbResultInArrayDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd99bd5b50a6c6dd317ad92"), "CustomerName" : "David Miller", "CustomerAge" ...
Read MoreHow to display tree structured data in Java?
To display tree structured data, use the JTree control in Java Swing.At first, create a node in the tree −DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");Now, add nodes to the node created above −DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp"); node.add(node1); node.add(node2); node.add(node3);Now, create more nodes and set them as child nodes for the nodes we creted above −DefaultMutableTreeNode one = new DefaultMutableTreeNode("Learning website"); DefaultMutableTreeNode two = new DefaultMutableTreeNode("Business website"); DefaultMutableTreeNode three = new DefaultMutableTreeNode("News publishing website"); DefaultMutableTreeNode four = new DefaultMutableTreeNode("Android app"); DefaultMutableTreeNode five = new DefaultMutableTreeNode("iOS app"); DefaultMutableTreeNode six = new DefaultMutableTreeNode("Editor ...
Read MoreDifference between fork() and exec() in C
Here we will see the effect of fork() and exec() system call in C. The fork is used to create a new process by duplicating the calling process. The new process is the child process. See the following property.The child process has its own unique process id.The parent process id of the child process is same as the process id of the calling process.The child process does not inherit the parent’s memory lock and semaphores.The fork() returns the PID of the child process. If the value is non-zero, then it is parent process’s id, and if this is 0, then ...
Read MoreImplement MongoDB toLowerCase() in a forEach loop to update the name of students?
Let us first create a collection with documents wherein one of the fields is StudentName −> db.lowerCaseDemo.insertOne({"StudentName":"JOHN SMith"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9a86fb50a6c6dd317ad9f") } > db.lowerCaseDemo.insertOne({"StudentName":"CAROL TAYLor"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9a88fb50a6c6dd317ada0") } > db.lowerCaseDemo.insertOne({"StudentName":"DAVID Miller"}); { "acknowledged" : true, "insertedId" : ObjectId("5cd9a89fb50a6c6dd317ada1") }Following is the query to display all documents from a collection with the help of find() method −> db.lowerCaseDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd9a86fb50a6c6dd317ad9f"), "StudentName" : "JOHN SMith" } { "_id" : ObjectId("5cd9a88fb50a6c6dd317ada0"), "StudentName" : "CAROL TAYLor" } { ...
Read MoreHow to show an android notification exactly 3 actions?
This example demonstrate about How to determine if an activity has been called by a Notification in AndroidStep 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.package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.util.Log ; import android.view.View ; public class MainActivity extends AppCompatActivity { public ...
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