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Design Patterns in Java

By Dinesh Thakur

Java design pattern or design pattern is not related to any specific language. Design patterns are very popular in the software industry. A design pattern is a solution to a common problem by software expertise. Design patterns are already defined and provide an industry-standard approach to solve a reoccurring problem while developing the application to save time. Design pattern promotes reusabilities that lead to more robust and highly maintainable code. It makes our code easy to understand and debug. It helps in faster development, and new members of the team understand it easily. [Read more…] about Design Patterns in Java

Final Keyword in Java

By Dinesh Thakur

Variables are useful when you need to store information that can be changed as the program runs. However, there may be certain situations in the program in which the variable’s value should not be allowed to modify. It accomplished using a special type of variable known as the final variable. The final variable also called a constant variable. It is a variable with a value that cannot be modified during the execution of the program. To declare a final variable, use the final keyword before the variable declaration and initialize it with a value. Its syntax is [Read more…] about Final Keyword in Java

How to Reverse String in Java

By Dinesh Thakur

In this tutorial, we’ll learn how to reverse a String in Java.

The string is a character sequence which in Java is considered an object. In Java, you can perform various operations on the string object. String Reverse is one of the most commonly used operations in a string object. In this tutorial, I’ll tell you the different reverse string approaches in Java. [Read more…] about How to Reverse String in Java

Java ArrayList class with Example

By Dinesh Thakur

Java ArrayList class is a part of unified architecture (collection framework) interfaces are present in java.util package and used when we want to change the array size when your Java program run. You know that arrays are that they’re fixed size that must be specified the number of elements when the array created. How to add elements values to an array in java that filled? It’s an easy way to create a more extensive array, and all its elements are copied from the (smaller) source array to the (broader) target array, with the remaining space for new elements. It’s an alternative is to use the ArrayList whose size can change frequently. An instance of Java ArrayList class contains an array that dynamically increased as required so that it relaxes the programmer from the burden of doing this. [Read more…] about Java ArrayList class with Example

Serialization and Deserialization in Java with Example

By Dinesh Thakur

The objects in our programs exist only while the program is executing. When the program closed, these objects cease to exist. How can we save an object in our program and restore it when the program rerun? For example, suppose that we are playing a computer chess game. We close the game before it finished. When we restart the game, it should resume from where we had left it, instead of from the beginning. One way to accomplish this would be to save information about the game (such as the locations of various game pieces, scores, and so forth) to a file, and then read this information back from the file to restore the game to the state where we had left it when it runs next. This is the idea behind serialization. Serialization is saving an object’s state as a binary stream (that is, as a sequence of bytes). When an object is serialized, it is said to be flattened or deflated. The reverse process of constructing an object from the binary data is known as deserialization. Thus, a deserialised (or inflated) object is one whose state has restored. [Read more…] about Serialization and Deserialization in Java with Example