r/JavaProgramming 12d ago

System Design Interview Problem - Parking Lot Design

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2 Upvotes

r/JavaProgramming 12d ago

Looking for the Complete Telusko Enterprise Java Course

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1 Upvotes

Does anyone have access to this course? If so, please DM me.


r/JavaProgramming 13d ago

LeetCode 7 Reverse Integer

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2 Upvotes

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.


r/JavaProgramming 13d ago

Oracle is offering 11 FREE certifications right now — including OCI, AI, Agentic AI, ERP, HCM, SCM, and more

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1 Upvotes

r/JavaProgramming 14d ago

Modern Java in the Wild is now live with a $4000+ prize pool!

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4 Upvotes

r/JavaProgramming 14d ago

LeetCode 6 Zigzag Conversion

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3 Upvotes

LeetCode problem Zigzag Conversion.The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)


r/JavaProgramming 14d ago

Interview this weekend

8 Upvotes

I have interview in infosys this weekend...opening is "senior java developer" I cant see the JD yet so can anyone please guide me what all should I focus on be it java, advanced java, spring boot and more importantly coding..


r/JavaProgramming 14d ago

Which platform you use to practice java from zero to hero

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1 Upvotes

Hey guys,

Lately there are many websites that come up to practice java programming, let's imagine yourself as a fresh learner and you need to practice java programming from basic output statement to advanced topics which platform you prefer other than hacker rank and leetcode


r/JavaProgramming 14d ago

How to design Twitter/X Like a Senior Engineer at FAANG Interview?

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1 Upvotes

r/JavaProgramming 14d ago

Do you mind if I ask how to use anti gravity.

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3 Upvotes

r/JavaProgramming 15d ago

LeetCode 5 Longest Palindromic Substring

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5 Upvotes

Longest Palindromic Substring


r/JavaProgramming 14d ago

Japan based bank project in accenture

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1 Upvotes

r/JavaProgramming 14d ago

Alberta byggede en 25 år gammel Java-portal om på 4-5 dage med Claude

0 Upvotes

En portal til et tilskudsprogram. Håndkodet i Java for 25 år siden. Tog fem måneder at bygge første gang.

Alberta byggede den om på fire til fem dage med Claude Code. Deres eget tal.

Det er den vinkel ved casen, jeg ville kigge på, hvis jeg sad på arvekode. Ikke fordi du skal rippe alt op, men fordi build-versus-rebuild-regnestykket lige har flyttet sig.

Alberta planlægger at samle 185 gamle apps i ét ministerium til 16 moderne, genbrugelige apps. Samme funktion, langt mindre at vedligeholde.

Det vigtige er ikke farten alene. Det er, at Claude henviste til fil og linje undervejs, så et menneske kunne efterprøve hvert skridt. Fart uden verificerbarhed er bare hurtig gæld.

Hele analysen: https://brinvik.com/da/journal/alberta-claude-sikkerhedsgennemgang-kode


r/JavaProgramming 14d ago

Help with Pseudocode

1 Upvotes

Hello. I am currently creating a currency converter for a Java programming course I am taking for credit. I ended up do you process a bit out of order. I was asked to create the pseudocode before the actual program. I did the opposite. I am terrible with Pseudocode and was hoping that someone could tell me if this Pseudocode followed along with my program properly. Below is the program followed by the code. Sorry if I made this a bit difficult. I am running on very little sleep and I'm finding myself forgetting the finer details. Thank you for any help you can offer.

Program:

import java.util.HashMap;

import java.util.Map;

import java.util.Scanner;

public class Main { // Changed from CurrencyConverter to Main

private static final Map<String, Double> exchangeRates = new HashMap<>();

static {

// Initialize exchange rates relative to the US dollar

exchangeRates.put("USD", 1.00);

exchangeRates.put("EUR", 0.931262);

exchangeRates.put("GBP", 0.807933);

exchangeRates.put("INR", 83.152991);

exchangeRates.put("AUD", 1.536377);

exchangeRates.put("CAD", 1.367454);

exchangeRates.put("SGD", 1.353669);

exchangeRates.put("CHF", 0.897854);

exchangeRates.put("MYR", 4.733394);

exchangeRates.put("JPY", 149.327016);

exchangeRates.put("CNY", 7.302885);

}

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

String continueConversion;

do {

String originalCurrency = getCurrencyCode(scanner, "Enter original currency code (USD, EUR, etc.): ");

double amount = getPositiveAmount(scanner);

String targetCurrency = getCurrencyCode(scanner, "Enter the currency to convert to (USD, EUR, etc.): ");

double convertedAmount = convertCurrency(originalCurrency, targetCurrency, amount);

System.out.printf("Amount in %s: %.2f%n", targetCurrency, convertedAmount);

System.out.print("Do you want to convert another amount? (yes/no): ");

continueConversion = scanner.nextLine().trim().toLowerCase();

} while (continueConversion.equals("yes"));

System.out.println("Thank you for using the currency converter!");

scanner.close();

}

private static String getCurrencyCode(Scanner scanner, String prompt) {

String currency;

do {

System.out.print(prompt);

currency = scanner.nextLine().toUpperCase();

if (!exchangeRates.containsKey(currency)) {

System.out.println("Invalid currency code. Please enter a valid one.");

}

} while (!exchangeRates.containsKey(currency));

return currency;

}

private static double getPositiveAmount(Scanner scanner) {

double amount;

do {

System.out.print("Enter amount of money in the original currency: ");

while (!scanner.hasNextDouble()) {

System.out.print("That's not a number! Try again: ");

scanner.next();

}

amount = scanner.nextDouble();

scanner.nextLine(); // Consume the newline character

} while (amount <= 0);

return amount;

}

private static double convertCurrency(String originalCurrency, String targetCurrency, double amount) {

double originalToUSD = 1 / exchangeRates.get(originalCurrency);

double usdToTarget = exchangeRates.get(targetCurrency);

return amount * originalToUSD * usdToTarget;

}

}

Pseudocode:

INITIALIZE exchangeRates AS a MAP

FUNCTION main

CREATE scanner FOR user input

SET continueConversion TO empty string

REPEAT

SET originalCurrency TO getCurrencyCode(scanner, "Enter original currency code (USD, EUR, etc.): ")

SET amount TO getPositiveAmount(scanner)

SET targetCurrency TO getCurrencyCode(scanner, "Enter the currency to convert to (USD, EUR, etc.): ")

SET convertedAmount TO convertCurrency(originalCurrency, targetCurrency, amount)

PRINT "Amount in targetCurrency: convertedAmount"

PRINT "Do you want to convert another amount? (yes/no): "

READ continueConversion FROM user input

UNTIL continueConversion IS NOT "yes"

PRINT "Thank you for using the currency converter!"

CLOSE scanner

FUNCTION getCurrencyCode(scanner, prompt)

SET currency TO empty string

REPEAT

PRINT prompt

READ currency FROM user input

CONVERT currency TO uppercase

IF currency NOT IN exchangeRates THEN

PRINT "Invalid currency code. Please enter a valid one."

ENDIF

UNTIL currency IS IN exchangeRates

RETURN currency

FUNCTION getPositiveAmount(scanner)

SET amount TO 0

REPEAT

PRINT "Enter amount of money in the original currency: "

WHILE NOT user input IS a valid number DO

PRINT "That's not a number! Try again: "

READ user input

ENDWHILE

READ amount FROM user input

UNTIL amount IS GREATER THAN 0

RETURN amount

FUNCTION convertCurrency(originalCurrency, targetCurrency, amount)

SET originalToUSD TO 1 / exchangeRates[originalCurrency]

SET usdToTarget TO exchangeRates[targetCurrency]

RETURN amount * originalToUSD * usdToTarget


r/JavaProgramming 15d ago

JAVA FOR CS STUDENT

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1 Upvotes

r/JavaProgramming 16d ago

I Used to Think Memory Leaks Were Loud in Java

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3 Upvotes

r/JavaProgramming 16d ago

Got an offer! Need advice urgently!!

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2 Upvotes

r/JavaProgramming 16d ago

How to Crack Coding Interviews in 2026: The Complete Step-by-Step Guide

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2 Upvotes

r/JavaProgramming 16d ago

LeetCode JAVA

3 Upvotes

In-depth LeetCode algorithm tutorials with full Java practical demos. We break down brute-force, optimized and optimal solutions, analyze boundary conditions and problem-solving logic to help you stop memorizing templates mechanically. Suitable for campus recruitment, social recruitment coding practice and absolute beginners. New algorithm insights released daily to help you ace big tech algorithm interviews effortlessly. https://youtu.be/Z5bmVeEDiCc


r/JavaProgramming 16d ago

Daumenkino

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1 Upvotes

4 Bilder mit einfachen JavaScript.


r/JavaProgramming 17d ago

Reviev my project

13 Upvotes

I'm wondering whether it's already at a level where I could show it as a portfolio piece for my first job, i.e. include it in my CV. Would you be able to take a look and let me know what you think? Thanks

https://github.com/DanielPopielski/Restaurant1


r/JavaProgramming 17d ago

Finding a community for Java people

9 Upvotes

I'm currently a student, learning Spring Boot (Web Tech) in Java, and I cannot find a good discord server or slack particularly for Java. So, could someone put up a link of discord or slack servers they use to communicate with other Java developers and students. Could really help.


r/JavaProgramming 17d ago

Accenture Fullstack Java Development interview questions

6 Upvotes

Hello,

I’m a fresher and I have a 1-hour interview coming up that includes both hr and technical rounds. I would like to know what I’m expected to prepare as a fresher. Could you please guide me?


r/JavaProgramming 17d ago

How to Solve System Design Problems on Interview? My Tried and Tested Framework

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1 Upvotes

r/JavaProgramming 17d ago

Why does the market seem heavily dominated by Java jobs compared to Node.js?

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1 Upvotes