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Iterating over Enum Values in Java 1. Overview Enum in Java is a datatype that helps us assign a predefined set of constants to a variable. In this quick article, we’ll see different ways in which we can iterate over an Enum in Java. 2. Iterating over Enum Values Let’s… Continue Reading java-enum-iteration
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Guide to System.gc() 1. Overview In this tutorial, we’re going to investigate the System.gc() method located in the java.lang package. Explicitly calling System.gc() is known for being a bad practice. Let’s try to understand why and if there are any use cases when calling this method might be useful. [[garbage… Continue Reading java-system-gc
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Void Type in Java 1. Overview As Java developers, we might have encountered the Void type at some occasion and wondered what was its purpose. In this quick tutorial, we’ll learn about this peculiar class and see when and how to use it as well as how to avoid using… Continue Reading java-void-type
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The Difference Between Collection.stream().forEach() and Collection.forEach() 1. Introduction There are several options to iterate over a collection in Java. In this short tutorial, we’ll look at two similar looking approaches — Collection.stream().forEach() and Collection.forEach(). In most cases, both will yield the same results, however, there are some subtle differences we’ll… Continue Reading java-collection-stream-foreach
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Why String is Immutable in Java? 1. Introduction In Java, Strings are immutable. An obvious question that is quite prevalent in interviews is “Why Strings are designed as immutable in Java?” James Gosling, the creator of Java, was once asked in an interview when should one use immutables, to which he… Continue Reading java-string-immutable
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Convert a Float to a Byte Array in Java 1. Overview In this quick tutorial, we’ll explore a few examples of using Java to convert a float to a byte array and vice versa. This is simple if we convert an int or a long to a byte array as… Continue Reading java-convert-float-to-byte-array
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Java – Try with Resources 1. Overview Support for try-with-resources – introduced in Java 7 – allows us to declare resources to be used in a try block with the assurance that the resources will be closed when after execution of that block. The resources declared must implement the AutoCloseable… Continue Reading java-try-with-resources
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Java ‘private’ Access Modifier 1. Overview In the Java programming language, fields, constructors, methods, and classes can be marked with access modifiers. In this tutorial, we’ll talk about the private access modifier in Java. 2. The Keyword The private access modifier is important because it allows encapsulation and information hiding, which… Continue Reading java-private-keyword
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Java – Random Long, Float, Integer and Double This quick tutorial will illustrate how to generate a long first using plain Java and using the Apache Commons Math library. This article is part of the “Java – Back to Basic” series here on Baeldung. 1. Generate an Unbounded Long Let’s… Continue Reading java-generate-random-long-float-integer-double
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Class Loaders in Java 1. Introduction to Class Loaders Class loaders are responsible for loading Java classes during runtime dynamically to the JVM (Java Virtual Machine). Also, they are part of the JRE (Java Runtime Environment). Hence, the JVM doesn’t need to know about the underlying files or file systems… Continue Reading java-classloaders
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