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Articles by Nishtha Thakur
Page 26 of 40
Java Program to enable drag and drop between two text fields in Java
Yes, we can enable drag and drop between two text fields in Java. Let us first create two JTextFields and set content in it as shown below −JTextField one = new JTextField(20); one.setText("You can drag!"); JTextField two = new JTextField(20); two.setText("Drag here or there");Now, we will enable and drag and drop for both the components created above −one.setDragEnabled(true); two.setDragEnabled(true);The following is an example to enable drag and drop between two text fields −Examplepackage my; import java.awt.Container; import java.awt.FlowLayout; import javax.swing.BoxLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception ...
Read MoreHow to determine if an activity has been called by a Notification in Android?
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 ...
Read MoreHow to allow only a single tree node to be selected in a JTree with Java?
Set the selection mode to SINGLE_TREE_SELECTION, if you want only a single tree node to be selected −tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);The following is an example to allow only a single tree node to be selected in a JTree −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeSelectionModel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Clothing"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Electronics"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("Home Decor"); ...
Read MoreHow to highlight a row in a table with Java Swing?
To highlight a row in a table, you can use the addRowSelectionInterval() method. At first create a table −DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel);Add some columns −tableModel.addColumn("Language/ Technology"); tableModel.addColumn("Text Tutorial"); tableModel.addColumn("Video Tutorial"); tableModel.addColumn("Views");Now, add rows to the table −tableModel.addRow(new Object[] { "NodeJS", "No", "Yes", "2350"}); tableModel.addRow(new Object[] { "MVC", "Yes", "No", "1500"}); tableModel.addRow(new Object[] { "ASP.NET", "Yes", "Yes", "3400"}); tableModel.addRow(new Object[] { "F#", "Yes", "No", "7890"}); tableModel.addRow(new Object[] { "Blockchain", "Yes", "No", "10600"}); tableModel.addRow(new Object[] { "SharePoint", "Yes", "Yes", "4900"});Highlight a single row by adding interval of rows. Set the same index for both the parameters ...
Read MoreHow to insert/store JSON array into a database using JDBC?
A Json array is an ordered collection of values that are enclosed in square brackets i.e. it begins with ‘[’ and ends with ‘]’. The values in the arrays are separated by ‘, ’ (comma).Sample JSON array{ "books": [ Java, JavaFX, Hbase, Cassandra, WebGL, JOGL] }The json-simple is a light weight library which is used to process JSON objects. Using this you can read or, write the contents of a JSON document using Java program.JSON-Simple maven dependencyFollowing is the maven dependency for the JSON-simple library − com.googlecode.json-simple json-simple ...
Read MoreMiddle of three using minimum comparisons in C++
In this section, we will see how to find the middle of three given values by comparing them. So if three numbers are given like (10, 30, 20), then it will find 20 as this is the middle element. Let us see the algorithm first, then we will implement that algorithm into C++ code.Algorithmmiddle_of_three(a, b, c): Input: Three numbers a, b and c Output: The middle of these three Begin if a > b, then if b > c, then return b else if a > c, then ...
Read MoreHow to apply adjustments to the last column of a JTable only, when the width of any column is changed in Java Swing?
To apply adjustments to the last column only, use the setAutoResizeMode and set the mode. The mode here would be AUTO_RESIZE_LAST_COLUMN. This will allow you to adjust only the last columns even if any of the column header is dragged to resize.Let us first see an example to create a table in Java −Examplepackage my; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; public class SwingDemo { public static void main(String[] argv) throws Exception { DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel); tableModel.addColumn("Technology"); ...
Read MoreHow to set the initial value of an auto-incremented column in MySQL using JDBC?
While creating a table, in certain scenarios, we need values to column such as ID, to be generated/incremented automatically. Various databases support this feature in different ways.In MySQL database you can declare a column auto increment using the following syntax.CREATE TABLE table_name( ID INT PRIMARY KEY AUTO_INCREMENT, column_name1 data_type1, column_name2 data_type2, column_name3 data_type3, column_name4 data_type4, ............ ........... );While inserting records in a table there is no need to insert value under the auto-incremented column. These will be generated automatically.Setting the initial valueBy default, the initial value of the auto-incremented column will be 1. You ...
Read MoreReturning multiple values from a function using Tuple and Pair in C++
In C or C++, we cannot return more than one value from a function. To return multiple values, we have to provide output parameter with the function. Here we will see another approach to return multiple value from a function using tuple and pair STL in C++.The Tuple is an object capable to hold a collection of elements, where each element can be of different types.The pair can make a set of two values, which may be of different types. The pair is basically a special type of tuple, where only two values are allowed.Let us see one example, where ...
Read MoreHow to set values to list of parameters of IN clause on PreparedStatement using JDBC?
The IN clause in MYSQL database is used to specify the list of parameters in a query.For example, you need to retrieve contents of a table using specific IDs you can do so using the SELECT statement along with the IN clause as −mysql> SELECT * from sales where ID IN (1001, 1003, 1005); +------+-------------+--------------+--------------+--------------+-------+------------+ | ID | ProductName | CustomerName | DispatchDate | DeliveryTime | Price | Location | +------+-------------+--------------+--------------+--------------+-------+------------+ | 1001 | Key-Board | Raja | 2019-09-01 | 11:00:00 | 8500 | Hyderabad ...
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