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Cover Image for Why is my Spring @Autowired field null?

Why is my Spring @Autowired field null?

updated a few hours ago
javanullnullpointerexceptionspring

# Why is my Spring @Autowired field null? šŸŒ± Welcome to another edition of our tech blog! Today, we're going to tackle a common issue that many developers face when using the Spring framework. You've probably encountered this frustrating problem before: y

Matheus Mello
Matheus Mello
Cover Image for How do I invoke a Java method when given the method name as a string?

How do I invoke a Java method when given the method name as a string?

updated a few hours ago
javareflection

# How to Invoke a Java Method with a String Name šŸŽ‰ Hey there tech enthusiasts! Are you feeling curious about how to invoke a Java method when all you have is the method name as a string? Don't worry, you've come to the right place! In this blog post, we'

Matheus Mello
Matheus Mello
Cover Image for How to filter a Java Collection (based on predicate)?

How to filter a Java Collection (based on predicate)?

updated a few hours ago
collectionsfilterjava

# Filtering a Java Collection like a Boss šŸ˜ŽšŸ” So, you want to filter a Java Collection based on a predicate? Well my friend, you've come to the right place! šŸ™Œ In this blog post, I'm going to show you some easy solutions to this common problem, and trust

Matheus Mello
Matheus Mello
Cover Image for How to append text to an existing file in Java?

How to append text to an existing file in Java?

updated a few hours ago
file-ioiojavatext-files

## Appending Text to an Existing File in Java: A Simple Guide šŸ“šŸ”—šŸ’» So, you need to append text repeatedly to an existing file in Java? No worries, I got you covered! šŸ™Œ Appending text to a file is a common requirement in many Java applications. Whether

Matheus Mello
Matheus Mello
Cover Image for What is the difference between == and equals() in Java?

What is the difference between == and equals() in Java?

updated a few hours ago
equalityjava

# What is the difference between == and equals() in Java? šŸ”ŽšŸ¤” So you want to know the difference between `==` and `equals()` in Java? šŸ¤” Don't worry, dear reader, I've got you covered! Let's dive into this commonly misunderstood topic and shed some light

Matheus Mello
Matheus Mello
Cover Image for What is a stack trace, and how can I use it to debug my application errors?

What is a stack trace, and how can I use it to debug my application errors?

updated a few hours ago
debuggingjavastack-trace

# šŸš§ Understanding Stack Trace to Debug Application Errors šŸš§ <p>Oh no! šŸ˜± You've encountered an error in your application and you're just seeing a confusing message like this:</p> <pre><code>Exception in thread "main" java.lang.NullPointerException

Matheus Mello
Matheus Mello
Cover Image for Simple way to repeat a string

Simple way to repeat a string

updated a few hours ago
javastring

# Simple Way to Repeat a String: Skip the For Loop and Stay Clever! šŸ”„šŸ“ Are you tired of using for loops to repeat a string? Looking for a smarter and more direct method? Well, you've come to the right place! In this blog post, we'll explore a simple yet

Matheus Mello
Matheus Mello
Cover Image for How to get the last value of an ArrayList

How to get the last value of an ArrayList

updated a few hours ago
arraylistjava

# How to Get the Last Value of an ArrayList šŸ˜ŽšŸ’” Are you tired of searching for a simple and effective way to retrieve the last value of an ArrayList? šŸ”„šŸ’­ Look no further! In this blog post, we will explore the common issues and provide easy solutions to

Matheus Mello
Matheus Mello
Cover Image for Why does array[idx++]+="a" increase idx once in Java 8 but twice in Java 9 and 10?

Why does array[idx++]+="a" increase idx once in Java 8 but twice in Java 9 and 10?

updated a few hours ago
javajava-10java-8java-9

# Why does array[idx++]+="a" increase idx once in Java 8 but twice in Java 9 and 10? šŸ” Have you ever come across code that works differently in different versions of Java? In this blog post, we'll explore the mysterious behavior of the `+=` operator on

Matheus Mello
Matheus Mello
Cover Image for How do I convert from int to String?

How do I convert from int to String?

updated a few hours ago
javastringtype-conversion

# Converting from int to String: Breaking Down the Mysterious "+" Operator šŸ§ So, you find yourself amidst a confusing project, scratching your head as you encounter this peculiar way of converting an `int` to a `String` in Java: ```java int i = 5; Strin

Matheus Mello
Matheus Mello