The File object represents the actual file/directory on the disk. Here are the list of constructors to create File Object in Java −Sr.No.Method & Description1File(File parent, String child)This constructor creates a new File instance from a parent abstract pathname and a child pathname string.2File(String pathname)This constructor creates a new File ... Read More

Let us see how precisions are handled in Java −Example Live Demoimport java.io.*; import java.lang.*; public class Demo{    public static void main(String[] args){       double my_val = 34.909;       System.out.println("The formatted value of 34.909 is ");       System.out.println(String.format("%.7f", my_val));       double my_val_2 ... Read More

Let us implement logical operators on String in Java −Example Live Demoimport java.io.*; public class Demo{    public static void main(String[] args){       int a = 45, b = 32, c = 87, d = 1;       System.out.println("The first variable is " + a);       ... Read More

Complex numbers are those that have an imaginary part and a real part associated with it. They can be added and subtracted like regular numbers. The real parts and imaginary parts are respectively added or subtracted or even multiplied and divided.Example Live Demopublic class Demo{    double my_real;    double my_imag; ... Read More

To check if a string is a valid keyword in Java, the code is as follows −Example Live Demoimport java.util.*; public class Demo{    static boolean valid_identifier(String my_str, int n){       if (!((my_str.charAt(0) >= 'a' && my_str.charAt(0) = 'A' && my_str.charAt(1) = 'a' && my_str.charAt(i) = 'A' && my_str.charAt(i) ... Read More

OpenCSV has to be installed first, which is a parser library for Java. The dependency has to be mentioned in the pom.xml file in the maven project. After that, the below code can be utilized.Exampleimport java.io.FileReader; import java.io.*; public class Demo{    public static void readDataLineByLine(String file){       ... Read More

Class variables are also known as static variables, and they are declared outside a method, with the help of the keyword ‘static’.Static variable is the one that is common to all the instances of the class. A single copy of the variable is shared among all objects.Example Live Demopublic class Demo{ ... Read More

An object graph contains a set of objects that are automatically serialized given that the object that contains the reference is serialized too. Any object that is serialized and contains an object reference, the object reference will be serialized by the JVM.Example Live Demoimport java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; ... Read More

Blockchain has become a buzz word in the recent times. It is being tried to be implemented in every software for various purposes, to check how it would work efficiently given different scenarios. It is a decentralized technology. It basically is data that is digital in nature and every piece ... Read More

Once the byte code is loaded by the JVM, (with the help of the .class file), the bytecode is checked to see the validity with the help of the verifier. The verifier checks the linking so as to perform operations efficiently. This way, the interpreter performs much efficiently. This process ... Read More