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Articles on Trending Technologies
Technical articles with clear explanations and examples
How many public classes of the same name it can have in Java?
A Java file contains only one public class with a particular name. If you create another class with same name it will be a duplicate class. Still if you try to create such class then the compiler will generate a compile time error. Example public class Example { } public class Example{ public void sample(){ System.out.println("sample method of the Example class"); } public void demo(){ System.out.println("demo method of the Example class"); } ...
Read MoreWhat are the prerequisites for learning Java?
In fact, you can directly start learning Java without any prior knowledge of programming language. But, the syntax in Java is similar to the syntax of the C programming language, therefore, Knowing C language helps to get hold of Java quickly. Having introduced to object-oriented principles before starting Java, also helps in the understanding of the language so, having an idea on object-oriented languages such as C++ also helps. In short, if you know C or C++ it will be a little bit easier to cope with Java technology.
Read MoreWhat is the difference between Object oriented programming and Object based programming?
Many of us have a misconception that Java script is an object oriented language. But, the truth is Java Script is an Object Based Language. Object Based languages are different from Object Oriented Languages: Object Based Languages Object based languages supports the usage of object and encapsulation. They does not support inheritance or, polymorphism or, both. Object based languages does not supports built-in objects. Javascript, VB are the examples of object bases languages. Object Oriented Languages Object Oriented Languages supports all the features of Oops including inheritance and polymorphism. They support built-in objects. C#, Java, VB. Net ...
Read MoreWhat is a composition in Java?
The composition is also a type of aggregation where the relationship is restrictive i.e. If two objects are in composition, the composed object will not exist without the other.
Read MoreHow to create a string from a Java ArrayList?
To convert the contents of an ArrayList to a String, create a StringBuffer object append the contents of the ArrayList to it, finally convert the StringBuffer object to String using the toString() method. Example import java.util.ArrayList; public class String_ArrayList { public static void main(String args[]) { ArrayList al = new ArrayList(); al.add("Hello"); al.add("are"); al.add("you"); StringBuffer sb = new StringBuffer(); for (String s : al) { sb.append(s); sb.append(" "); } String str = sb.toString(); System.out.println(str); } } Output Hello are you
Read MoreWhen to use (document).ready() and when (window).load() in jQuery?
$(window).load()Use $(window).load(), when you want the code inside it to run only once the entire page is ready (not only DOM). It executes when the page is fully loaded, including frames, objects and imagesNote: The load() method deprecated in jQuery version 1.8. It was completely removed in version 3.0. To see its working, add jQuery version for CDN before 3.0.$(document).ready()Use the $(document).ready() method when you want the code inside it to run once the page DOM is ready to execute JavaScript code.
Read MoreHow to print new line in Java?
The java.io.PrintStream.println() method prints an array of characters and then terminate the line. This method behaves as though it invokes print(char[]) and then println(). Using this method you can print the data on the console. import java.io.*; public class PrintStreamDemo { public static void main(String[] args) { char[] c = {'a', 'b', 'c'}; // create print stream object PrintStream ps = new PrintStream(System.out); // print an array and change line ps.println(c); ps.print("New Line"); // flush the stream ps.flush(); } } Output abc New Line
Read MoreUsing SAP Mobile Platform Server
To use SAP Mobile Platform SDK for application development, you need to install SMP SDK on your local machine.Now regarding use of OData service, SAP Mobile Platform SDK contains three APIs for accessing and manipulating an OData source.OData Online Store API for Windows: this API is used to manage an Online OData store.OData Offline Store API for Windows: This API is used to manage an Offline OData store. Also note that you can also access Offline API documentation at Offline OData.OData API for Windows: This is used to manage OData feed for both offline and online stores.https://help.sap.com/viewer/42dc90f1e1ed45d9aafad60c80646d10/3.0.15/en-US/cd61551b9cbf40c8a170a3b7437e9536.htmlAlso you can navigate ...
Read MoreWhat are the different build tools in Java?
"On a mean, a developer spends a considerable quantity of your time doing mundane tasks compiling the code, packaging the binaries, deploying the binaries to the checkserver, testing the changes," copying the code from one location to another. To automate and simplify these tasks we can use build tools like Ant, Maven, Gradle etc.
Read MoreWhat is the difference between compositions and aggregations in Java?
In Aggregation relationship among classes by which a class (object) can be made up of any combination of objects of other classes. It allows objects to be placed directly within the body of other classes.A composition is also a type of aggregation where the relationship is restrictive i.e. If two objects are in composition, the composed object will not exist without the other.
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