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To get the tab size from a JTextArea, you can use the getTabSize() method −textArea.getTabSize();We will assign it to int variable and display the size in the Console −int size = textArea.getTabSize(); System.out.println("Tab Size = "+size);The following is an example to set the tab size of a JTextArea −Examplepackage my; import java.awt.GridLayout; import javax.swing.*; public class SwingDemo { SwingDemo() { JFrame frame = new JFrame(); JTextArea textArea = new JTextArea("This is demo text."); int size = textArea.getTabSize(); System.out.println("Tab Size = "+size); frame.add(textArea); ... Read More
Let us first create a table −mysql> create table DemoTable1 ( value int ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(10); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;Output+-------+ | value | +-------+ | 10 | +-------+ 1 row in set (0.00 sec)Following is the query to create second table −mysql> create table DemoTable2 ( value1 int ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table ... Read More
CachedRowSet interface does not provide any methods to determine whether a particular column exists.Therefore, to find whether a RowSet contains a specific column, you need to compare the name of each column in the RowSet with the required name. To do so −Retrieve the ResultSetMetaData object from the RowSet using the getMetaData() method.ResultSetMetaData meta = rowSet.getMetaData();Get the number of columns in the RowSet using the getColumnCount() method.int columnCount = meta.getColumnCount();The getColumnName() method returns the name of the column of the specified index. Using this method retrieve the column names of the RowSet from index 1 to column count and compare ... Read More
For this, you can use DATEDIFF() function. The current date time is as follows −mysql> select now(); +---------------------+ | now() | +---------------------+ | 2019-06-09 19:15:56 | +---------------------+ 1 row in set (0.00 sec)Let us first create a table −mysql> create table DemoTable -> ( -> ShippingDate datetime -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-06-01'); Query OK, 1 row affected (0.19 sec) ... Read More
The HTML DOM previousElementSibling property returns the previous element in the same tree level of the specified element in an HTML document.SyntaxFollowing is the syntax −node.previousElementSiblingExampleLet us see an example of previousElementSibling 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%; } p{ font-weight:700; font-size:1.2rem; } .drop-down{ width:50%; border:2px solid #fff; ... Read More
Here we will see what are the differences between static_cast and normal C style cast.The normal cast like (int)x is C style typecasting where static_cast(x) is used in C++.This static_cast() gives compile time checking facility, but the C style casting does not support that. This static_cast() can be spotted anywhere inside a C++ code. And using this C++ cast the intensions are conveyed much better.In C like cast sometimes we can cast some type pointer to point some other type data.Like one integer pointer can also point character type data, as they are quite similar, only difference is character has ... Read More
Here, we are activating a frame. For deactivation, we have used dispose −Thread.sleep(2000); frame.setVisible(false);The frame first activates and then deactivates after 2 seconds since we have set sleep to 2000 miliseconds.The following is an example to activate and deactivate JFrame −Exampleimport java.awt.Frame; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws InterruptedException { JFrame frame = new JFrame(); frame.add(new JLabel("Demo")); frame.pack(); frame.setVisible(true); Thread.sleep(2000); frame.setState(Frame.ICONIFIED); Thread.sleep(2000); frame.setVisible(false); frame.dispose(); ... Read More
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Use $mod to get the even numbers and pull them from the array. Let us first create a collection with documents −>db.pullEvenNumbersDemo.insertOne({"AllNumbers":[101, 102, 104, 106, 108, 109, 110, 112, 14, 17, 18, 21]}); { "acknowledged" : true, "insertedId" : ObjectId("5cd45b072cba06f46efe9eea") }Following is the query to display all documents from the collection with the help of find() method −> db.pullEvenNumbersDemo.find().pretty();This will produce the following output −{ "AllNumbers" : [ 102, 104, 106, 108, 109, 110, 112, ... Read More
To display JTabbedPane on the right, you need to set the location to the right using the constant RIGHT −JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.RIGHT);The following is an example to display JTabbedPane on the right −Examplepackage my; import javax.swing.*; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Technologies"); JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.RIGHT); JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); panel3 = new JPanel(); panel4 = ... Read More