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Java Basics
course content

Course Content

Java Basics

Java Basics

1. Getting Started
Backend DevelopmentRole of Java in the Backend Java Advantages Memory Types In Java Java's SyntaxYour First ProgramComments
2. Basic Types and Operations
Primitive Data TypesChallenge: Primitive TypesMathematical Operations on charMathematical Operations in JavaIf-Else StatementSwitch-Case StatementNew Task StructureChallenge: Weekday Switch
3. Loops
Introduction to LoopsWhile-LoopDo-While LoopChallenge: Building a Server Retry MechanismFor-Loop Increment and DecrementInfinite LoopChallenge: Filtering Numbers in a Loop
4. Arrays
What is Array?Using Loops with ArraysIndex Out Of BoundsTwo-Dimentional ArrayIteration In Two-Dimensional ArrayFor-Each Loop
5. String
What Is String? Basic Methods In StringPractical Applications of String MethodsChallenge: Filter Failure MessagesNullPointerException StringBuilderString Pool, Method Equals() Summary

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Challenge: Building a Server Retry Mechanism

Task

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Implement a program that attempts to connect to a server up to 5 times. If the connection is successful, the program prints a success message. If it fails after 5 attempts, it prints an error message.

  1. Create a method called tryConnect(int successfulAttempt) that returns a boolean indicating whether the connection succeeded.
  2. Inside this method:
    • Start a do-while loop that runs up to 5 times.
    • On each iteration, increment the retry counter.
    • If the retry count equals the given successfulAttempt, print a success message and return true.
    • If not, print "Server unavailable, retrying...".
  3. If the loop finishes without success, return false.
  4. In the main method, call tryConnect(...) with a test value and print "Failed to connect to the server after 5 attempts." if the result is false.

Solution

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solution

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Section 3. Chapter 4
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book
Challenge: Building a Server Retry Mechanism

Task

Swipe to start coding

Implement a program that attempts to connect to a server up to 5 times. If the connection is successful, the program prints a success message. If it fails after 5 attempts, it prints an error message.

  1. Create a method called tryConnect(int successfulAttempt) that returns a boolean indicating whether the connection succeeded.
  2. Inside this method:
    • Start a do-while loop that runs up to 5 times.
    • On each iteration, increment the retry counter.
    • If the retry count equals the given successfulAttempt, print a success message and return true.
    • If not, print "Server unavailable, retrying...".
  3. If the loop finishes without success, return false.
  4. In the main method, call tryConnect(...) with a test value and print "Failed to connect to the server after 5 attempts." if the result is false.

Solution

java

solution

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Thanks for your feedback!

Section 3. Chapter 4
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