A HashMap in Java is a robust data structure that efficiently stores and retrieves key-value pairs. Falling under the ‘Map’ interface in the Java Collections Framework, HashMap offers a dynamic and flexible means of organizing data. The HashMap works on the principle of hashing, which inv...
Java 8 is a giant step forward for the Java language. Writing this book has forced me to learn a lot more about it. In Project Lambda, Java gets a new closure syntax, method-references, and default methods on interfaces. It manages to add many of the features of functional languages wit...
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API in Java is delivered via Java Development Kit or JDK. JDK is made up of three entities. Java compiler: A pre-quoted program used for breaking the complex user-written codes into simple and computer-understandable codes, known as byte-code. Java Virtual Machine (JVM): Allotted to proce...
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How does Java work? As explained earlier, Java is a multiple platform programming language. This means that it can be written for one OS and run on another. How is this possible? Java code is first written in a Java Development Kit, which are available for Windows, Linux, and macOS. ...
IntelliJ IDEA 2025.1 delivers full Java 24 support, introduces Kotlin notebooks, and makes K2 mode the default, marking a major step toward the best Kotlin experience. Debugging is more powerful, with pause and resume functionality for watch evaluations, while numerous other refinements across the ID...
Like in the second scenario, humongous objects make up 36% of the data volume. This means that of the 60 GB of live data, 38.4 GB lives in regular objects and 21.6 GB lives in humongous objects. Because the average humongous object is 18 MB, humongous regions are only 56.25% full on ...
One example of inner interface used in java standard library is java.util.Map and Java.util.Map.Entry. Here java.util.Map is used also as a namespace. Entry does not belong to the global scope, which means there are many other entities that are Entries and are not necessary Map's entr...
The asterisk (*) after “java.io” in the import statement means that all classes and interfaces within the “java.io” package are imported. It saves effort, as it stops the need to import each class or interface separately. How to Import java.io.*; in Java Program? An example is co...