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Try this (https://teamtreehouse.com/library/practice-input-and-output-in-java) practice workshop. Here's the list of practice Java workshops (https://teamtreehouse.com/library/topic:java/type:practice) Answer from Alexander Davison on teamtreehouse.com

CodingBat

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CodingBat Java

CodingBat code practice · Welcome to Codingbat. See help for the latest. Java Example Solution Code · Java String Introduction (video) Java Substring v2 (video) Java String Equals and Loops · Java String indexOf and Parsing · Java If and Boolean Logic · If Boolean Logic Example Solution Code 1 (video) If Boolean Logic Example Solution Code 2 (video) Java For and While Loops ·

Python

CodingBat code practice · Welcome to Codingbat. See help for the latest. Python Example Code · Python Strings · Python Lists · Python If Boolean · Code Badges ·

CodingBat Python Warmup-1 sleep_in

The parameter weekday is True if it is a weekday, and the parameter vacation is True if we are on vacation. We sleep in if it is not a weekday or we're on vacation. Return True if we sleep in · sleep_in(False, False) → True sleep_in(True, False) → False sleep_in(False, True) → True

Python Example Code

CodingBat.com code practice.

Java Example Solution Code

The examples are geared to help with the CodingBat java coding problems.

CodeChef

codechef.com › practice › java

Practice Java

Complete your Java coding practice with our online Java practice course on CodeChef. Solve over 180 coding problems and challenges to get better at Java.

Discussions

Java Basics - Extra Practice Problems?

Devon Johnson is having issues with: Hi, Does anyone know if a place to find extra practice problems for each topic covered in the Java Basics course? I'd like a way to chal... More on teamtreehouse.com

teamtreehouse.com

1

May 22, 2018

Java Practice: Someone give me basic problems!

There are a few sites that are basically just coding challenges in various languages here are some java specific links: https://codingbat.com/java https://www.hackerrank.com/domains/java https://www.codewars.com/collections/java-challenges More on reddit.com

r/javahelp

9

3

February 6, 2023

Project to practice concurrency in Java

https://www.reddit.com/r/learnjava/comments/j8x9vv/what_are_some_not_very_complex_but_interesting/ More on reddit.com

r/learnjava

4

22

January 28, 2020

Best practice for mocking a ResultSet?

Don't. This is not what mocking is for. Rule #1 of mocking is do not mock interfaces you do not own. Why are you using the ResultSet? Let's say that you have a program that needs to get some widget counts, and those widget counts are obtained by running a query on the database. You iterate over the ResultSet and return a list of counts. Now you want to write a unit test. Since the ResultSet is at the boundary between the application and the database, and since you can't actually run the query, this is the natural thing you might want to mock. This is the wrong intuition. Rather, look at it from the program's perspective. All I really want is a count of widgets, but I don't know how to get that myself. So, instead of specifying all the details of how to ask a database for the answer, create an interface that simply asks the question. Whoever can answer the question will implement the interface. I don't care how the question is answered. interface WidgetRepository { List getWidgetCounts(); } Now, provide the WidgetRepository as an argument: public class WidgetProcessor { private WidgetRepository repo; public WidgetProcessor(WidgetRepository repo) { this.repo = repo; } public void process() { for(int count : repo.getWidgetCount()) { // Do something with widget counts } } } So that, instead of mocking ResultSet, you mock WidgetRepository. Much, much easier. Later, you'll create something like JdbcWidgetRepository which knows how to use a ResultSet to answer the question. This class you do not test with a mock, but for real in an integration test. More on reddit.com

r/java

10

11

February 26, 2015

Videos

29:08

YouTube

Java Tutorial: Practice Questions On Conditionals & Switch Case ...

September 20, 2020

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