How-to articles, tricks, and solutions about JAVA

A Maven snapshot is a version of a Maven artifact that is under active development and has not been released yet.

Apache Camel is an open-source integration framework that provides a uniform interface for integrating various applications and protocols.

String args[] is a parameter in the main method of a Java program. It is an array of strings that can be used to pass command-line arguments to the program when it is executed.

In Spring MVC, the @ModelAttribute annotation is used to bind request parameters to method arguments in controller methods.

In Java, a daemon thread is a thread that runs in the background and does not prevent the program from exiting.

In Java, a Java Bean is a class that follows a certain set of conventions.

A serialVersionUID is a unique identifier for a serializable class. It is used to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization.

A stack trace is a report of the active stack frames at a particular point in time during the execution of a program. It is a useful tool for debugging because it can help you understand the sequence of method calls that led to an error or exception in yo

A StackOverflowError is an error that occurs when the Java Virtual Machine (JVM) runs out of space on the call stack. The call stack is a data structure that is used to store information about method calls, including the name of the method, the parameters

On macOS, the path of the JDK (Java Development Kit) is typically /Library/Java/JavaVirtualMachines/jdk<version>.jdk/Contents/Home, where <version> is the version of the JDK.

Reflection is a feature of the Java language that allows you to inspect and manipulate classes, fields, and methods at runtime.

To read a file into a String in Java, you can use the readAllBytes() method of the Files class and the new String() constructor:

@SuppressWarnings("unchecked") is an annotation in Java that tells the compiler to suppress specific warnings that are generated during the compilation of the code.

There are a few different approaches you can take to validate email addresses in Java. Here are some options:

In Java, constants are usually implemented using the final keyword. The final keyword can be used to declare a variable, a method, or a class as final. A final variable is a variable that cannot be modified after it is initialized, a final method is a met

To tell if a character is a letter or number in Java without using regexes, you can use the Character class and its isLetter() and isDigit() methods.

In Java, the == operator is used to compare the references of two objects to see if they point to the same object in memory.

The Java Development Kit (JDK) is a software development kit that contains the tools and libraries needed to develop Java applications. The JDK includes the Java Runtime Environment (JRE), which is a set of libraries and tools that allow Java applications

JavaServer Faces (JSF) is a user interface (UI) framework for building web applications.

In the Java programming language, the accessibility of a class, method, or field can be controlled using access modifiers. There are four access modifiers in Java:

In Java, a Set is an interface that extends the Collection interface.

There are several ways you can iterate through the characters of a string in Java.

In Kotlin, you can use the companion object to define static methods and properties.

In Java, the equivalent of the C++ Pair class is the AbstractMap.SimpleEntry class or the AbstractMap.SimpleImmutableEntry class.

In Java, the this keyword refers to the current object.