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50+ Java Threads Interview Questions And Answers
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Java Interview Questions
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Java interview questions
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60+ Java Strings Quiz Questions
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Strings
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Java 9 @SafeVarargs Annotation Changes
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Java 9
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Java9
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Java 9 Diamond Operator Improvements
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Java 9
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Java9
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Java 9 Try With Resources Improvements
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Java 9
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Java 9
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Java 9 Stream API Improvements : takeWhile(), dropWhile(), ofNullable() And iterate()
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Java 9
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Java9
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Java 9 Immutable Collections : List.of(), Set.of() And Map.of()
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Java 9
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Java 9 JShell – REPL Tool
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Java 9
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Java 9 Interface Private Methods
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Java 9
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How To Unzip Files In Java?
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File Handling
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Java 8 Lambda Expressions
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Java 8 Functional Interfaces
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Java 8 Method References
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Java 8 Interface Changes
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Java 8 Streams
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Java 8 Collectors
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Interface Vs Abstract Class After Java 8
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Collections Vs Streams
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Solving Real Time Queries Using Java 8 - Employee Management System
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Exception Handling Interview Questions
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Strings Interview Questions
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Array Interview Questions
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25 Fresher"s Basic Java Interview Questions
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15 Simple But Confusing Java Interview Questions
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Inheritance Interview Questions
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Tricky Java Interview Questions
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30+ Java Exception Handling Interview Questions And Answers
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Solving Real Time Queries Using Java 8 Features -Employee Management System
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20 Different Number Pattern Programs In Java
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Quiz On Increment And Decrement Operators : i++, ++i, i- -, - -i
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110+ Popular Java Interview Programs With Solutions
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50+ Java Threads Interview Questions And Answers
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⇢Java 9 Interface Private Methods
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⇢Java 9 JShell
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⇢Java 9 Immutable Collections
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⇢Java 9 Stream API Improvements
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⇢Java 9 Try With Resources Improvements
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⇢Java 9 Diamond Operator Improvements
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⇢ Java 9 @SafeVarargs Annotation Changes
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⇢Java 8 Lambda Expressions
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⇢Java 8 Functional Interfaces
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⇢Java 8 Method References
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⇢Java 8 Interface Changes
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⇢Interface Vs Abstract Class After Java 8
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⇢Java 8 Streams
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⇢Collections Vs Streams
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⇢Java 8 Collectors
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⇢Java 8 Optional Class
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⇢Java 8 Spliterator
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⇢StringJoiner, String.join() & Collectors.joining()
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⇢map() Vs flatMap()
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⇢Intermediate Vs Terminal Operations
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⇢Iterator Vs Spliterator
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⇢Java 8 Sort HashMap By Keys
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⇢Java 8 Sort HashMap By Values
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⇢Java 8 Merge Two Maps With Same Keys
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⇢Solving Real Time Queries Using Java 8 Features -Employee Management System
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⇢final Vs finally Vs finalize
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⇢Collection Vs Collections
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⇢Fail-Fast Vs Fail-Safe
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⇢"==" Vs equals()
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⇢Shallow Copy Vs Deep Copy
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⇢Iterator Vs ListIterator
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⇢ArrayList Vs LinkedList
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⇢wait() Vs sleep()
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⇢throw Vs throws Vs Throwable
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⇢Error Vs Exception
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⇢ClassNotFoundException Vs NoClassDefFoundError
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⇢Program Vs Process Vs Threads
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⇢User Threads Vs Daemon Threads
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⇢Access Vs Non-access Modifiers
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⇢Extends Thread Vs Implements Runnable
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⇢Statement Vs PreparedStatement Vs CallableStatement
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⇢execute() Vs executeQuery() Vs executeUpdate()
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⇢HashMap Vs HashSet
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⇢Enumeration Vs Iterator
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⇢notify() Vs notifyAll()
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⇢HashMap Vs HashTable
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⇢BLOCKED Vs WAITING States
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⇢Class Variables Vs Instance Variables
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⇢Array Vs ArrayList
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⇢StackOverflowError Vs OutOfMemoryError
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⇢start() Vs run()
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⇢Interface Vs Abstract Class
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⇢Collections Vs Streams
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⇢Quiz On St
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⇢Quiz On ++ & -- Operators
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⇢Quiz On Classes & Objects
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⇢Quiz On Inheritance
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⇢Quiz On polymorphism
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⇢Quiz On Abstract Classes
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⇢Quiz On Interfaces
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⇢Quiz On Modifiers
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⇢Quiz On Nested Classes
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⇢Quiz On Enums
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Interview Programs
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#InterviewPrograms
⇢110+ Java Interview Programs With Solutions
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Interview Q&A
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#InterviewQA
⇢Interview Q&A On main()
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⇢Interview Q&A On Constructors
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⇢Inheritance Interview Q&A
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⇢Modifiers Interview Q&A
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⇢Type Casting Interview Q&A
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⇢Overloading Interview Q&A
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⇢Overriding Interview Q&A
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⇢Abstract Class Interview Q&A
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⇢Interface Interview Q&A
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⇢final Keyword Interview Q&A
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⇢Nested Classes Interview Q&A
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⇢Array Interview Q&A
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⇢String Interview Q&A
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⇢Exception Handling Interview Q&A
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⇢40+ Core Java Coding Q&A
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⇢25 Simple Basic Java Interview Q&A
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⇢10 Tricky Java Interview Q&A
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⇢15 Simple But Confusing Interview Q&A
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⇢10 Programmatic Interview Q&A
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Getting Started
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#GettingStarted
⇢JDK Installation
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⇢Simple Hello World Java Program
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⇢Compile And Run A Java Program
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⇢Set Path Environment Variable
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⇢javac And java Command
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⇢Name, Compile And Run Java Files
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Classes & Objects
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#ClassesObjects
⇢Static members
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⇢Non-Static members
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https://javaconceptoftheday.com/non-static-members-in-java/
⇢Constructors
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https://javaconceptoftheday.com/constructors-in-java/
⇢IIB
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⇢Quiz
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Inheritance
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#Inheritance
⇢Inheritance Tutorials
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⇢super & this keywords
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⇢Quiz On Inheritance
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⇢Inheritance Interview Q&A
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Polymorphism
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#Polymorphism
⇢What Is Polymorphism?
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⇢Method Overloading
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⇢Method Overriding
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⇢Static & Dynamic Binding
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⇢Overloading Vs Overriding
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⇢Quiz On Polymorphism
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⇢Overloading Interview Q&A
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⇢Overriding Interview Q&A
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Abstraction
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#Abstraction
⇢Abstract Class
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⇢Interfaces
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https://javaconceptoftheday.com/interfaces-in-java/
⇢Interface Vs Abstract Class
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⇢Quiz On Abstract Class
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⇢Quiz On Interfaces
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⇢Abstract Class Interview Q&A
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⇢Interfaces Interview Q&A
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Packages
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#packages
⇢What Are Packages?
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https://javaconceptoftheday.com/packages-in-java/
⇢Access Modifiers
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https://javaconceptoftheday.com/access-modifiers-in-java/
⇢Access Vs Non-access Modifiers
follow
https://javaconceptoftheday.com/access-and-non-access-modifiers-in-java/
⇢Quiz On Modifiers
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https://javaconceptoftheday.com/java-practice-questions-on-access-modifiers/
⇢Modifiers Interview Q&A
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https://javaconceptoftheday.com/java-interview-questions-on-modifiers/
Type Casting
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#TypeCasting
⇢Type Casting
follow
https://javaconceptoftheday.com/type-casting-in-java/
⇢ClassCastException In Java
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https://javaconceptoftheday.com/classcastexception-in-java/
⇢Type Casting Interview Q&A
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https://javaconceptoftheday.com/java-interview-questions-on-type-casting/
Nested Classes
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#NestedClasses
⇢Static Nested Classes
follow
https://javaconceptoftheday.com/nested-classes-in-java/
⇢Non-static Nested Classes
follow
https://javaconceptoftheday.com/inner-classes-in-java/
⇢Local Inner Classes
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https://javaconceptoftheday.com/local-inner-class-in-java/
⇢Anonymous Inner Classes
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https://javaconceptoftheday.com/anonymous-inner-class-in-java/
⇢Variable Hiding Or Shadowing
follow
https://javaconceptoftheday.com/variable-hiding-shadowing-java/
⇢Inheritance Of Inner Classes
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https://javaconceptoftheday.com/inheritance-inner-classes-java/
⇢Quiz On Nested Classes
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https://javaconceptoftheday.com/java-practice-coding-questions-on-nested-classes/
⇢Nested Classes Interview Q&A
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https://javaconceptoftheday.com/java-interview-questions-on-nested-classes/
Java Enums
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#JavaEnums
⇢Java Enums Tutorials
follow
https://javaconceptoftheday.com/java-enums-tutorial-with-examples/
⇢Java Enums In 18 Points
follow
https://javaconceptoftheday.com/18-points-every-java-developer-should-know-about-enums-in-java/
⇢Quiz On Java Enums
follow
https://javaconceptoftheday.com/java-practice-coding-questions-on-enum-types/
Wrapper Classes
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#WrapperClasses
⇢Wrapper Classes Introduction
follow
https://javaconceptoftheday.com/wrapper-classes-java/
⇢Wrapper Classes : Constructors & Methods
follow
https://javaconceptoftheday.com/constructors-methods-wrapper-classes-java/
⇢valueOf() Method
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https://javaconceptoftheday.com/valueof-method-wrapper-classes-java/
⇢Number Class
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https://javaconceptoftheday.com/number-class-java/
⇢Auto-widening Vs Auto-boxing Vs Auto-upcasting
follow
https://javaconceptoftheday.com/auto-widening-auto-boxing-auto-upcasting-java/
⇢isNaN() & isInfinite() Methods
follow
https://javaconceptoftheday.com/isnan-and-isinfinite-methods-java/
⇢Arrays In Java
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https://javaconceptoftheday.com/arrays-in-java/
⇢Array Of Objects
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https://javaconceptoftheday.com/array-of-objects-in-java/
⇢Array Memory Management
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https://javaconceptoftheday.com/how-are-the-arrays-stored-in-the-memory/
⇢Multidimensional Arrays
follow
https://javaconceptoftheday.com/multidimensional-arrays-in-java/
⇢Jagged Arrays
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https://javaconceptoftheday.com/jagged-arrays-in-java/
⇢Arrays As Parameters & Return Types
follow
https://javaconceptoftheday.com/array-parameter-return-types-method/
⇢Array Copy
follow
https://javaconceptoftheday.com/copying-an-array-in-java/
⇢java.util.arrays Class-1
follow
https://javaconceptoftheday.com/java-util-arrays-class-java/
⇢java.util.arrays Class-2
follow
https://javaconceptoftheday.com/java-util-arrays-class-java-contd/
⇢Java Arrays : 10 Interesting Observations
follow
https://javaconceptoftheday.com/interesting-observations-about-arrays-in-java/
⇢Java Arrays Quiz
follow
https://javaconceptoftheday.com/10-java-interview-sample-coding-questions-on-arrays/
⇢Java Arrays Interview Q&A
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https://javaconceptoftheday.com/java-array-interview-questions-and-answers/
⇢Array Interview Programs
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https://javaconceptoftheday.com/java-array-interview-programs/
⇢Introduction To Strings
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https://javaconceptoftheday.com/introduction-strings/
⇢How the strings are stored in the memory?
follow
https://javaconceptoftheday.com/how-the-strings-are-stored-in-the-memory/
⇢Strings Are Immutable : An Example
follow
https://javaconceptoftheday.com/example-to-prove-strings-are-immutable/
⇢When To Use "==", equals() and hashCode() On Strings?
follow
https://javaconceptoftheday.com/when-to-use-equals-hashcode-on-strings/
⇢String Vs StringBuffer Vs StringBuilder
follow
https://javaconceptoftheday.com/stringbuffer-stringbuilder-string-class/
⇢What Is String Intern?
follow
https://javaconceptoftheday.com/string-intern-java/
⇢java.lang.String : Constructors
follow
https://javaconceptoftheday.com/exploring-java-lang-string-class/
⇢String Concatenation
follow
https://javaconceptoftheday.com/exploring-java-lang-string-class-concatenation-of-strings/
⇢Character Extraction
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https://javaconceptoftheday.com/character-extraction/
⇢Java Strings : 20 Points
follow
https://javaconceptoftheday.com/tutorial-examples-strings-in-java/
⇢Java Strings Interview Q&A
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https://javaconceptoftheday.com/java-string-interview-questions-and-answers/
⇢Strings Interview Programs
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https://javaconceptoftheday.com/java-interview-programs-on-strings/
Exception Handling
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#ExceptionHandling
⇢Java Exception Handling
follow
https://javaconceptoftheday.com/exception-handling-java/
⇢try, catch & finally Blocks
follow
https://javaconceptoftheday.com/try-catch-finally-blocks-java/
⇢Multiple catch Blocks
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https://javaconceptoftheday.com/multiple-catch-blocks-java/
⇢Nested try-catch blocks
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https://javaconceptoftheday.com/nested-try-catch-blocks-java/
⇢Return Value From try-catch-finally Blocks
follow
https://javaconceptoftheday.com/return-value-from-try-catch-finally-blocks/
⇢Hierarchy Of Exceptions
follow
https://javaconceptoftheday.com/hierarchy-exceptions-java/
⇢throw Keyword
follow
https://javaconceptoftheday.com/throwing-rethrowing-exception-java/
⇢throws Keyword
follow
https://javaconceptoftheday.com/throws-keyword-java/
⇢Method Overriding With throws Clause
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https://javaconceptoftheday.com/method-overriding-with-throws-clause/
⇢Checked & Unchecked Exceptions
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https://javaconceptoftheday.com/checked-unchecked-exceptions-java/
⇢User Defined Exceptions
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https://javaconceptoftheday.com/user-defined-exceptions-java/
⇢Chained Exceptions
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https://javaconceptoftheday.com/chained-exceptions-java/
⇢throw Vs throws Vs Throwable
follow
https://javaconceptoftheday.com/difference-between-throw-throws-and-throwable-in-java/
⇢Error Vs Exception
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https://javaconceptoftheday.com/difference-between-error-vs-exception-in-java/
⇢ClassNotFoundException Vs NoClassDefFoundError
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https://javaconceptoftheday.com/classnotfoundexception-vs-noclassdeffounderror-in-java/
⇢Frequently Occurring Exceptions In Java
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https://javaconceptoftheday.com/frequently-occurring-exceptions-in-java-with-examples/
⇢Exception Handling Interview Q&A
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https://javaconceptoftheday.com/java-exception-handling-interview-questions-and-answers/
⇢Introduction To Threads
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https://javaconceptoftheday.com/threads-in-java/
⇢Thread Creation
follow
https://javaconceptoftheday.com/creating-threads-in-java/
⇢Different Ways Of Using Threads
follow
https://javaconceptoftheday.com/defining-threads-in-java/
⇢Types Of Threads
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https://javaconceptoftheday.com/types-threads-java/
⇢Thread Naming
follow
https://javaconceptoftheday.com/naming-thread-java/
⇢Thread Identification
follow
https://javaconceptoftheday.com/how-to-identify-a-thread-in-java/
⇢Thread Priority
follow
https://javaconceptoftheday.com/priority-thread-java/
⇢Thread.sleep() Method
follow
https://javaconceptoftheday.com/thread-sleep-method-java/
⇢Thread.join() Method
follow
https://javaconceptoftheday.com/joining-threads-java/
⇢Thread Interference
follow
https://javaconceptoftheday.com/thread-interference-in-java/
⇢Thread Synchronization
follow
https://javaconceptoftheday.com/synchronization-in-java/
⇢Thread Deadlock
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https://javaconceptoftheday.com/deadlock-in-java/
⇢How To Detect deadlocked threads In Java?
follow
https://javaconceptoftheday.com/detect-deadlocked-threads-using-threadmxbean-class-java/
⇢How To Avoid Deadlock In Java?
follow
https://javaconceptoftheday.com/avoid-the-deadlock-java/
⇢Interthread Communication Using wait(), notify() & notifyAll()
follow
https://javaconceptoftheday.com/interthread-communication-using-wait-notify-notifyall/
⇢Thread.interrupt() Method
follow
https://javaconceptoftheday.com/thread-interruption-java/
⇢Thread Life Cycle
follow
https://javaconceptoftheday.com/thread-life-cycle-thread-states-java/
⇢Thread Group
follow
https://javaconceptoftheday.com/thread-group-java/
⇢wait() Vs sleep()
follow
https://javaconceptoftheday.com/difference-between-wait-and-sleep-methods-in-java/
⇢Program Vs Process Vs Threads
follow
https://javaconceptoftheday.com/differences-between-program-vs-process-vs-threads/
⇢User Threads Vs Daemon Threads
follow
https://javaconceptoftheday.com/difference-between-used-threads-vs-daemon-threads-in-java/
⇢Extends Thread Vs Implements Runnable
follow
https://javaconceptoftheday.com/extends-thread-vs-implements-runnable-in-java/
⇢How To Stop A Thread?
follow
https://javaconceptoftheday.com/how-to-stop-a-thread-in-java/
⇢notify() Vs notifyAll()
follow
https://javaconceptoftheday.com/difference-between-notify-and-notifyall-in-java/
⇢BLOCKED Vs WAITING States
follow
https://javaconceptoftheday.com/difference-between-blocked-vs-waiting-states-in-java/
⇢start() Vs run()
follow
https://javaconceptoftheday.com/start-and-run-methods-in-java-threads/
⇢Java Threads : 7 Special Observations
follow
https://javaconceptoftheday.com/7-things-every-java-programmer-should-know-about-threads-in-java/
⇢How To Append Text To A File?
follow
https://javaconceptoftheday.com/append-text-to-a-file-in-java/
⇢How To Find Number Of Chars, Words & Lines in A File?
follow
https://javaconceptoftheday.com/find-number-of-characters-words-and-lines-in-file-in-java/
⇢How To Find Most Repeated Word In Text File?
follow
https://javaconceptoftheday.com/find-most-repeated-word-in-text-file-in-java/
⇢How To Sort A Text File?
follow
https://javaconceptoftheday.com/how-to-sort-a-text-file-in-java/
⇢How To Set File Permissions?
follow
https://javaconceptoftheday.com/set-file-permissions-in-java/
⇢How To Compare Two Text Files?
follow
https://javaconceptoftheday.com/compare-two-text-files-in-java/
⇢How To Read & Write Images?
follow
https://javaconceptoftheday.com/read-and-write-images-in-java/
⇢How To Replace Specific String In Text File?
follow
https://javaconceptoftheday.com/modify-replace-specific-string-in-text-file-in-java/
⇢How To Copy A File?
follow
https://javaconceptoftheday.com/copy-a-file-in-java/
⇢How To Make Text File Read-only?
follow
https://javaconceptoftheday.com/make-text-file-read-only-in-java/
⇢How To Find Type, Total Space, Free Space & Usable Space Of All Drives?
follow
https://javaconceptoftheday.com/find-type-total-space-free-space-and-usable-space-of-all-drives-in-java/
⇢How To List All Files In Directory?
follow
https://javaconceptoftheday.com/list-all-files-in-directory-in-java/
Generics
follow
#Generics
⇢Why We Need generics?
follow
https://javaconceptoftheday.com/why-we-need-generics-in-java/
⇢Generic Class
follow
https://javaconceptoftheday.com/defining-generic-class-in-java/
⇢Generic Interfaces
follow
https://javaconceptoftheday.com/generic-interfaces-java/
⇢Generic Methods & Constructors
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https://javaconceptoftheday.com/generic-methods-and-generic-constructors/
⇢Bounded Types
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https://javaconceptoftheday.com/bounded-types/
⇢Wildcard Arguments
follow
https://javaconceptoftheday.com/wildcard-arguments-java/
⇢Generics And Their Inheritance
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https://javaconceptoftheday.com/generics-and-their-inheritance/
⇢Type Erasure
follow
https://javaconceptoftheday.com/type-erasure/
⇢Generics : Interesting Observations
follow
https://javaconceptoftheday.com/some-interesting-observations-about-generics-in-java/
Java Collections
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#JavaCollections
⇢Class Hierarchy
follow
https://javaconceptoftheday.com/collection-framework-class-hierarchy/
⇢Collection Interface
follow
https://javaconceptoftheday.com/collection-framework-collection-interface/
⇢List Interface
follow
https://javaconceptoftheday.com/collection-framework-list-interface/
⇢ArrayList Class
follow
https://javaconceptoftheday.com/collection-framework-arraylist-class/
⇢Array Vs ArrayList
follow
https://javaconceptoftheday.com/differences-between-array-vs-arraylist-in-java/
⇢Advantages Of ArrayList Over Arrays
follow
https://javaconceptoftheday.com/advantages-of-using-arraylist-over-arrays/
⇢ArrayList Programs
follow
https://javaconceptoftheday.com/java-arraylist-programming-examples/
⇢Iterator Vs ListIterator
follow
https://javaconceptoftheday.com/difference-between-iterator-and-listiterator-in-java/
⇢Vector Class
follow
https://javaconceptoftheday.com/collection-framework-vector-class/
⇢ArrayList Vs Vector
follow
https://javaconceptoftheday.com/difference-between-arraylist-and-vector-class/
⇢Why Not To Use Vector Class In Your Code?
follow
https://javaconceptoftheday.com/not-use-vector-class-code/
⇢LinkedList Class
follow
https://javaconceptoftheday.com/java-collection-framework-linkedlist-class/
⇢ArrayList Vs LinkedList
follow
https://javaconceptoftheday.com/arraylist-vs-linkedlist-java/
⇢LinkedList Programs
follow
https://javaconceptoftheday.com/java-linkedlist-programming-examples/
⇢Queue Interface
follow
https://javaconceptoftheday.com/collection-framework-queue-interface/
⇢PriorityQueue Class
follow
https://javaconceptoftheday.com/java-collection-framework-priorityqueue-class/
⇢PriorityQueue Example With Program
follow
https://javaconceptoftheday.com/java-priorityqueue-example/
⇢Deque Interface
follow
https://javaconceptoftheday.com/collection-framework-deque-interface/
⇢ArrayDeque Class
follow
https://javaconceptoftheday.com/java-collection-framework-arraydeque-class/
⇢Set Interface
follow
https://javaconceptoftheday.com/collection-framework-set-interface/
⇢HashSet Class
follow
https://javaconceptoftheday.com/java-collection-framework-hashset-class/
⇢How HashSet Works?
follow
https://javaconceptoftheday.com/how-hashset-works-internally-in-java/
⇢HashSet Example With Program
follow
https://javaconceptoftheday.com/java-hashset-example/
⇢LinkedHashSet Class
follow
https://javaconceptoftheday.com/java-collection-framework-linkedhashset-class/
⇢How LinkedHashSet Works?
follow
https://javaconceptoftheday.com/how-linkedhashset-works-internally-in-java/
⇢LinkedHashSet Example With Program
follow
https://javaconceptoftheday.com/java-linkedhashset-example/
⇢SortedSet Interface
follow
https://javaconceptoftheday.com/collection-framework-sortedset-interface/
⇢NavigableSet Interface
follow
https://javaconceptoftheday.com/collection-framework-navigableset-interface/
⇢TreeSet Class
follow
https://javaconceptoftheday.com/java-collection-framework-treeset-class/
⇢TreeSet Example With Program
follow
https://javaconceptoftheday.com/java-treeset-example/
⇢HashSet Vs LinkedHashSet Vs TreeSet
follow
https://javaconceptoftheday.com/hashset-vs-linkedhashset-vs-treeset-in-java/
⇢Map Interface
follow
https://javaconceptoftheday.com/java-collection-framework-map-interface/
⇢HashMap Class
follow
https://javaconceptoftheday.com/hashmap-in-java-with-example/
⇢How HashMap Works?
follow
https://javaconceptoftheday.com/how-hashmap-works-internally-in-java/
⇢Initial Capacity & Load Factor
follow
https://javaconceptoftheday.com/initial-capacity-and-load-factor-of-hashmap-in-java/
⇢HashMap Vs hashSet
follow
https://javaconceptoftheday.com/differences-between-hashmap-vs-hashset-in-java/
⇢HashMap Vs HashTable
follow
https://javaconceptoftheday.com/differences-between-hashmap-and-hashtable-in-java/
⇢HashMap Programs
follow
https://javaconceptoftheday.com/java-hashmap-programs-and-examples/
⇢Introduction To JDBC
follow
https://javaconceptoftheday.com/java-jdbc-tutorial/
⇢Types Of JDBC Drivers
follow
https://javaconceptoftheday.com/types-of-jdbc-drivers/
⇢Database Connection
follow
https://javaconceptoftheday.com/how-to-connect-to-the-database-in-java/
⇢DriverManager Class
follow
https://javaconceptoftheday.com/drivermanager-class-in-java/
⇢java.sql.Connection Interface
follow
https://javaconceptoftheday.com/java-sql-connection-interface-in-jdbc/
⇢CREATE, INSERT, SELECT, UPDATE & DELETE Examples
follow
https://javaconceptoftheday.com/java-jdbc-tutorial-sql-create-insert-select-update-delete-examples/
⇢executeQuery() Vs executeUpdate() Vs execute()
follow
https://javaconceptoftheday.com/difference-between-executequery-executeupdate-execute-in-jdbc/
⇢PreparedStatement
follow
https://javaconceptoftheday.com/preparedstatement-in-java/
⇢CallableStatement
follow
https://javaconceptoftheday.com/java-callablestatement-stored-procedures-in-out-parameters-examples/
⇢Statement Vs PreparedStatement Vs CallableStatement
follow
https://javaconceptoftheday.com/statement-vs-preparedstatement-vs-callablestatement-in-java/
⇢ResultSetMetaData
follow
https://javaconceptoftheday.com/resultsetmetadata-in-jdbc-with-example/
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