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Articles by Nikitha N
Page 5 of 6
5 different ways to create objects in Java
Consider a class Tester which has implemented Cloneable interface. Now you can initialize an object using following five ways:1. Using new keyword.Tester tester1 = new Tester();2. Using Class.forName() methodTester tester2 = (Tester)Class.forName("Tester").newInstance();3. Using clone method.Tester tester3 = tester1.clone();4. Using Constructor.forName() methodTester tester4 = Tester.class.getConstructor().newInstance();5. Using DeserializationObjectInputStream objectInputStream = new ObjectInputStream(inputStream ); Tester tester5 = (MyObject) objectInputStream.readObject(); Using new keyword is the most preferred one.
Read MoreNew keyword in Java
Yes, it is similar to a new keyword of C++. a new keyword is used to initialize/create an object. See the following example −Employee employee = new Employee();Here new keyword is used to create an object of class Employee.new Employee() invokes the constructor of the class Employee.new keyword can also be used without assigning the object to a reference variable. See the example −String name = new Employee().getName();Here we are creating an object using new keyword and then invoked a method getName() on the object and passed the result to a variable.
Read MoreHow to find Kaprekar numbers within a given range using Python?
A modified Kaprekar number is a positive whole number n with d digits, such that when we split its square into two pieces - a right hand piece r with d digits and a left hand piece l that contains the remaining d or d−1 digits, the sum of the pieces is equal to the original number (i.e. l + r = n).You can find Kaprekar numbers within a given range by testing each number for the given condition in the given range. exampledef print_Kaprekar_nums(start, end): for i in range(start, end + 1): ...
Read MoreWhat does the method contains(obj o) do in java?
The contains(Object) method of the java.util.ArrayList class returns true if this list contains the specified element.Exampleimport java.util.ArrayList; public class ArrayListDemo { public static void main(String[] args) { ArrayList arrlist = new ArrayList
Read MoreWhat are classpath of projects in Java eclipse projects?
You can include Jar files to which you need to set the classpath in the eclipse project using build pathStep 1 − Right click on the project Select Build Path → Configure Build Path.Step 2 − Select libraries select Add External JARs… button.Step3 − Then browse through the folder where the required jar files exits, select them and press open.Selected jar files will be added to the Libraries. Finally, press OK.Now, if you open the Referenced libraries in the project you can observe the added jar file.
Read MoreLogging in SAP using command line
sapshcut.exe command can be used to log in to SAP from command line as shown in below example:ProcedureAdd the directory that contains the sapshcut.exe command to your system or user path. The sapshcut.exe command is installed as part of the SAP client into the following directory: C:\Program Files\SAP\FrontEnd\SAPguiTo add additional directories to the system or user path on Windows systems, select Control Panel > System > Advanced > Environment Variables.The .bat file must be named sapshcut.bat must be located in your default path preceding the sapshcut.exe file.The following parameters are passed to the sapshcut.bat file when called from a predefined ...
Read MoreUsing SAP Gateway service in SAP Web project
Please executes the below steps to get the services added −Define service in your manifest.json file?"sap.app": { [...], "dataSources": { "mainService": { "uri": "Path of your service", "type": "OData", "settings": { "odataVersion": "X.X", "localUri": "localService/metadata.xml" } } }, [...]The model definition should be implemented in your manifest.json file?"models": { [...], "": { "dataSource": "mainService", "settings": { "metadataUrlParams": { "sap-documentation": "heading" }, "defaultBindingMode": "TwoWay" } } },
Read MoreHow to compile packages in Java
Let us look at an example that creates a package called animals. It is a good practice to use names of packages with lower case letters to avoid any conflicts with the names of classes and interfaces.Following package example contains interface named animals −/* File name : Animal.java */ package animals; interface Animal { public void eat(); public void travel(); }Now, let us implement the above interface in the same package animals −package animals; /* File name : MammalInt.java */ public class MammalInt implements Animal { public void eat() { System.out.println("Mammal eats"); } ...
Read MoreHow can we check the default character sets of all the MySQL databases we have on the server?
The query below will return the name of the database along with the default character set −mysql> SELECT SCHEMA_NAME 'Database', default_character_set_name 'charset' FROM information_schema.SCHEMATA; +--------------------+---------+ | Database | Charset | +--------------------+---------+ | information_schema | utf8 | | gaurav | latin1 | | menagerie | latin1 | | mysql | latin1 | | performance_schema | utf8 | | sample | latin1 | | test | latin1 | | tutorial | latin1 | +--------------------+---------+ 8 rows in set (0.00 sec)
Read MoreHow can we insert current year automatically in a YEAR type column of MySQL table?
It can be done by using either CURDATE() or NOW() in MySQL query as follows −mysql> Insert into year1(Year_Copyright) values (CURDATE()); Query OK, 1 row affected, 1 warning (0.06 sec) mysql> Select * from year1; +----------------+ | Year_Copyright | +----------------+ | 2017 | | 2017 | +----------------+ 2 rows in set (0.00 sec) mysql> Insert into year1(Year_Copyright) values (NOW()); Query OK, 1 row affected, 1 warning (0.06 sec) mysql> Select * from year1; +----------------+ | Year_Copyright | +----------------+ | 2017 | | 2017 | | 2017 | +----------------+ 1 rows in set (0.00 sec)
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