Skip to main content

Why main method syntax is given by sun people like

Why main method syntax is given by sun people like
public static void main ( String [ ] args )
================================
👉Public :-it declare as public coz this method is called by whome jvm itself. So jvm can call it from any where. ..
👉static:-coz main method no way related with any instance so without createing any instance jvm can call it .That's why it make it as static
👉Void:- void means no return type coz suppose ur method return some value to jvm then jvm what will do with this value. So it's return type is void
👉main:-this is simple name by naming convention nd only this name is configured in jvm that's why jvm always search that similar name i.e (main)...
👉(String[] args):- max used datatype in application is String so it is consider as command line argument. ..

Comments

Popular posts from this blog

Mockito interview Questions

1.       Question 1. What Is Mockito? Answer : Mockito allows creation of mock object for the purpose of Test Driven Development and Behavior Driven development. Unlike creating actual object, Mockito allows creation of fake object (external dependencies) which allows it to give consistent results to a given invocation. 2.       Question 2. Why Do We Need Mockito? What Are The Advantages? Answer : Mockito differentiates itself from the other testing framework by removing the expectation beforehand. So, by doing this, it reduces the coupling. Most of the testing framework works on the "expect-run-verify". Mockito allows it to make it "run-verify" framework. Mockito also provides annotation which allows to reduce the boilerplate code. 3.       Question 3. Can You Explain A Mockito Framework? Answer : In Mockito, you always check a particular class. The dependency in that class is injected using m...

application.properties vs application.yml vs bootstarp.yml in spring boot

APPLICATION.PROPERTIES: In Spring Boot, configuration details are kept in the  application.properties  file .The application.properties is present under   the classpath(file location src/main/resources ).The basic configuration properties like DB details, server port etc. is present in the   application.properties  file as given below – spring.datasource.url=jdbc:oracle:thin:@manoj:1521:orcl spring.datasource.username=tog spring.datasource.password=sci YAML File: Spring Boot supports YAML based properties configurations to run the application. Instead of  application.properties we can                                                         use  application.yml f...

Java Example Program to Convert List to Set

import java.util.ArrayList; import java.util.HashSet; import java.util.Set; public class ListToSet {  /**   * @author Amarjit Kumar   * @category interview questions   *   * Description: Convert List to set in java with example program   *   */  public static void main(String[] args) {   ArrayList<String> arrList= new ArrayList<>();   arrList.add("Java");   arrList.add("Java");   arrList.add("List to String");   arrList.add("Example Program");   Set<String> strSet = new HashSet<String>(arrList);   System.out.println(strSet);   System.out.println(arrList);  } } /*  * Java program to convert list to set. Convert ArrayList of string to HashSet  * in java example program How to convert List to Set in java Set<String> strSet  * = new HashSet<String>(arrList); HashSet having a constructor which will take  * list as an ar...