Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles by George John
Page 55 of 79
How to add manifest permission to an application in Android?
This example demonstrate about How to add manifest permission to an application in Android.Step 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.java Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.sample ; import android.os.Bundle ; import android.support.v7.app.AppCompatActivity ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; } }Step 4 − Add the following ...
Read MoreI want to return the next node after this node in a JTree with Java
Use the getNextNode() method to get the next node after this node in Java. Here, we are displaying the next node of child node “eight” -System.out.println("Next node after this node = "+eight.getNextNode());The following is an example to return the next node after this node in a JTree -Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; 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 (Product1 - P66778)"); DefaultMutableTreeNode node2 ...
Read MoreHow to make a background 25% transparent on Android?
This example demonstrate about How to make a background 25% transparent on Android.Step 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.java Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.sample ; import android.os.Bundle ; import android.support.v7.app.AppCompatActivity ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; } }Step 4 − Add the following code ...
Read MoreHow to set a value in a particular JTable cell with Java?
Let’s say initially our table is the following with a specific cell [2, 1] with value “Kane” −The following is an example to set a new value to the above table. Here, we will update the cell [2, 1] −table.setValueAt("Guptill", 2, 1);Let us see the complete example −Examplepackage my; import java.awt.Color; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.border.TitledBorder; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); JPanel panel = new JPanel(); panel.setBorder(BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(), ...
Read MoreHow to make a JTree editable in Java?
To make JTree editable in Java, use the TreeCellEditor class. With that, set the setEditable() method to true −TreeCellEditor editor = new DefaultCellEditor(textField); tree.setEditable(true); tree.setCellEditor(editor);The above will make the tree editable. The following is an example to make a JTree editable in Java −Examplepackage my; import javax.swing.DefaultCellEditor; import javax.swing.JFrame; import javax.swing.JTextField; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeCellEditor; 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 = ...
Read MoreCan we get total number of rows in a MySQL database?
To get the total number of rows in a MySQL database, you can use aggregate function SUM() along with inbuilt column TABLE_ROWS from INFORMATION_SCHEMA.TABLES.The syntax is as follows−SELECT SUM(TABLE_ROWS) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = database();Let’s say we are using the database with the name ‘sample’.Now we will get the total number of rows in a MySQL database−mysql> SELECT SUM(TABLE_ROWS) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = database();This will produce the following output−+-----------------+ | SUM(TABLE_ROWS) | +-----------------+ | 2043 | +-----------------+ 1 row in set (22.11 sec)
Read MoreHow can I set a table in a JPanel in Java?
Let us first set rows and columns for our table −String[][] rec = { { "1", "Steve", "AUS" }, { "2", "Virat", "IND" }, { "3", "Kane", "NZ" }, { "4", "David", "AUS" }, { "5", "Ben", "ENG" }, { "6", "Eion", "ENG" }, }; String[] header = { "Rank", "Player", "Country" };Now, set the above in a table as rows and columns −JTable table = new JTable(rec, header);Add the table in the panel −JPanel panel = new JPanel(); panel.add(new JScrollPane(table));The following is an example to create a table in a panel −Examplepackage my; ...
Read MoreHow to update MySQL column with random value?
To update column with random value, you can use the below syntax−update yourTableName set yourColumnName =round(1+rand()*100);The above syntax will generate a value between 1 to 100. Let us see an example and create a table−mysql> create table DemoTable ( Number int ); Query OK, 0 rows affected (0.46 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(80); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(100000); ...
Read MoreDisable Tooltip for a component with an already enabled tooltip in Java
Let’s say we have set the tooltips for all the components using the following method in Java, for example −setToolTipText("Enter Age");Here, we have already enabled tooltips for all the components using the setToolTipText(). But, after enabling all of them, we disabled the tooltips using the following −ToolTipManager.sharedInstance().setEnabled(false);The following is an example to disable Tooltip for a component with an already enabled tooltip −Examplepackage my; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; import javax.swing.ToolTipManager; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame.setDefaultLookAndFeelDecorated(true); ...
Read MoreHow to create a database on command line in MySQL?
First, you need to open the command prompt. You can open using shortcut windows+R key.The screenshot is as follows −Now type CMD and press OK button −Now the following command prompt would be visible −Now reach the MySQL bin directory. The screenshot is as follows −Following is the query to run MySQL in the command line to create a database −Now you can check the database is created or not using SHOW DATABASES command −mysql> SHOW DATABASES;This will produce the following output −+---------------------------+ | Database | +---------------------------+ | bothinnodbandmyisam ...
Read More