In java, a non-static final variable can be assigned a value at two places.At the time of declaration.In constructor.ExampleLive Demopublic class Tester {    final int A;    //Scenario 1: assignment at time of declaration    final int B = 2;    public Tester() {       //Scenario ... Read More

The end user is usually not concerned about the transaction or operations done at various levels and is only aware of the product which may be a software or an application. Therefore, this is a shared database which is specifically designed for the end user, just like different levels’ managers. ... Read More

Being a type of Collection, we can convert a set to Stream using its stream() method.ExampleLive Demoimport java.util.HashSet; import java.util.Set; import java.util.stream.Stream; public class Tester {    public static void main(String args[]) {       Set set = new HashSet();       set.add("a");       ... Read More

This example shows how to copy the contents of one file into another file using read & write methods of FileStreams classes.ExampleLive Demoimport java.io.*; public class Main {    public static void main(String[] args) throws Exception {       BufferedWriter out1 = new BufferedWriter(new FileWriter("srcfile"));       ... Read More

When we assigned an int to Integer object, it is first converted to an Integer Object and then assigned. This process is termed as autoboxing. But there are certain things which you should consider while comparison of such objects using == operator. See the below example first.ExampleLive Demopublic class Tester ... Read More

Let us look at a simple code first that will print the words Hello World.ExampleLive Demopublic class MyFirstJavaProgram {    /* This is my first java program.        * This will print 'Hello World' as the output        */    public static void main(String ... Read More

Prior to Java 2, Java provided ad hoc classes such as Dictionary, Vector, Stack, and Properties to store and manipulate groups of objects. Although these classes were quite useful, they lacked a central, unifying theme. Thus, the way that you used Vector was different from the way that you used ... Read More

Ideally No. But, using the tricky code, a subclass can override a private method as well. See the example below −ExampleLive Democlass A {    private void display() {       System.out.println("A.display");    }     public void callDisplay() {       System.out.println("A.callDisplay");       display();   ... Read More

Byte StreamsJava byte streams are used to perform input and output of 8-bit bytes. Though there are many classes related to byte streams but the most frequently used classes are, FileInputStream and FileOutputStream. Following is an example which makes use of these two classes to copy an input file into ... Read More

The java.io.File class provides useful methods on file. This example shows how to check a file hidden or not by using the file.isHidden() method of File class.Exampleimport java.io.File; public class Main {    public static void main(String[] args) {       File file = new File("C:/java.txt");     ... Read More