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In this section, we will see how to check whether a given character is number, or the alphabet or some special character in C.The alphabets are from A – Z and a – z, Then the numbers are from 0 – 9. And all other characters are special characters. So If we check the conditions using these criteria, we can easily find them.Example#include #include main() { char ch; printf("Enter a character: "); scanf("%c", &ch); if((ch >= 'A' && ch = 'a' && ch = '0' && ch
In C++ and Java, there are the concept of Inheritance. The inheritance properties are used to reuse the code and also make a relationship between two objects. Here we will see some basic differences between inheritance in C++ and inheritance in Java.In Java, all of the classes are extending the Object class. So there is always a single level inheritance tree of classes. The object class is present at the root of the tree. Let us check this is true or not using a simple code.Example//This is present in the different file named MyClass.java public class MyClass { MyClass() ... Read More
Row countThe last() method of the ResultSet interface moves the cursor to the last row of the ResultSet and, the getRow() method returns the index/position of the current row.Therefore, to get the number of rows move the cursor to the last row using the last() method and get the position of that (last) row using the getRow() method.Let us create a table with name MyPlayers in MySQL database using CREATE statement as shown below −CREATE TABLE MyPlayers( ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Date_Of_Birth date, Place_Of_Birth VARCHAR(255), Country VARCHAR(255), PRIMARY KEY (ID) );Now, we will insert 7 records in ... Read More
JSON.stringify()If we need to send data to a web server the data should be a string.To change the object literal to string JSON.stringify() method should be used.For instanceExample-1 Live Demo var obj = {name:"rekha", age:40, city:"newyork"}; var myJSON = JSON.stringify(obj); document.getElementById("demo").innerHTML = myJSON; Output{"name":"rekha","age":40,"city":"newyork"}Example-2 Live Demo var obj = {"name":"ramesh","age":30,"family": [{"mother":"geetha","father":"rao"}],"city":"berlin"}; var myJSON = JSON.stringify(obj); document.getElementById("demo").innerHTML = myJSON; Output{"name":"ramesh","age":30,"family":[{"mother":"geetha","father":"rao"}],"city":"berlin"}
Set a MatteBorder from BorderFactory class −MatteBorder border = (MatteBorder)BorderFactory.createMatteBorder(2, -1, 5, 10, icon);Now, set the above created MatteBorder to a component −JButton button = new JButton("Matte Border"); button.setBorder(border);The following is an example to set a MatteBorder from BorderFactory class −Examplepackage my; import java.awt.BorderLayout; import java.awt.Container; import javax.swing.BorderFactory; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.border.Border; import javax.swing.border.EtchedBorder; import javax.swing.border.MatteBorder; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Border raisedBorder = new EtchedBorder(EtchedBorder.RAISED); ImageIcon icon = new ImageIcon("new.gif"); ... Read More
At first, set the setShowGrid() to FALSE to disable all the grid lines. To display only horizontal grid lines in a table, set the method setShowHorizontalLines() to TRUE. Let us first create a table with rows and columns −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" }; JTable table = new JTable(rec, header);Now, display only horizontal grid lines −table.setShowGrid(false); table.setShowHorizontalLines(true);The following ... Read More
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Subject varchar(100) -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject) values('C'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Subject) ... Read More
In this section we will see one problem. Here n elements are given in an array. We have to check whether there is a permutation of that array exists, such that each element indicates the number of elements present either before or after it.Suppose the array elements are {2, 1, 3, 3}. The appropriate permutation is like {3, 1, 2, 3}. Here the first 3 is indicating there are three elements next of it, the 1 indicates there is only one element before this. The 2 indicates there are two elements before it and the last 3 indicates that there ... Read More
The static_cast is used for the normal/ordinary type conversion. This is also the cast responsible for implicit type coercion and can also be called explicitly. You should use it in cases like converting float to int, char to int, etc. This can cast related type classes.Example#include using namespace std; int main() { float x = 4.26; int y = x; // C like cast int z = static_cast(x); cout >> "Value after casting: " >> z; }OutputValue after casting: 4If the types are not same it will generate some error.Example#include using namespace std; class Base ... Read More
JDBC provides a mechanism known as batch processing, in which you can group a set of INSERT or, UPDATE or, DELETE commands (those produce update count value) and execute them at once. You can insert multiple records in to a table using this.Adding statements to the batchStatement, PreparedStatement and CallableStatement objects hold a list (of commands) to which you can add related statements (those return update count value) using the addBatch() method.stmt.addBatch(insert1); stmt.addBatch(insert2); stmt.addBatch(insert3);Executing the batchAfter adding the required statements, you can execute a batch using the executeBatch() method of the Statement interface.stmt.executeBatch();Using batch updates, we can reduce the communication ... Read More