Cryptography is the practice of securing data through encryption and decryption. Java provides robust cryptographic APIs within the javax.crypto and java.security packages, enabling developers to implement secure data transmission, authentication, and integrity checks. Key Concepts in Cryptography: Encryption: Converting plaintext data into an unreadable format (ciphertext). Decryption: Reversing the encryption process to obtain the original …
The java.lang.Runtime class is part of the java.lang package, and it provides methods to interact with the Java runtime environment. It is a singleton class, meaning only one instance of it can be obtained through the getRuntime() method. This class is useful for managing system resources, executing processes, and obtaining runtime information such as memory …
References
The StringBuilder class in Java, introduced in Java 5, is designed to represent a mutable sequence of characters. Unlike the String class, which creates immutable objects, StringBuilder allows you to modify the character sequence without creating new objects, making it more efficient for frequent string manipulations. A key difference between StringBuilder and StringBuffer is that …
The StringBuffer class in Java is a part of the java.lang package and provides a mutable sequence of characters, unlike the String class which is immutable. This means that when you modify a StringBuffer object, the original object is changed rather than creating a new one. One of the key features of StringBuffer is that …
Iterable Interface The Iterable interface represents a collection of elements which can be iterated (looped) over. It is a root interface in the Java Collections Framework defined in java.lang package. Any class implementing Iterable can be the target of the enhanced for-each loop. It contains a single method: iterator() which returns an Iterator. Iterator Interface …
In Java, the Comparable and Comparator interfaces are fundamental for sorting objects and customizing sorting orders. They are part of the Java Collections Framework and provide ways to compare objects based on their natural ordering (Comparable) or a defined custom ordering (Comparator). Comparable Interface – Natural Ordering The Comparable interface is used to define a …
In Java, Security Managers and Security Policies play crucial roles in enforcing security measures within applications. They are part of Java’s security architecture designed to protect systems and data from malicious activities. Understanding how Security Managers and Policies work is essential for developing secure Java applications. In Java Security Managers and their respective policies handled …
References
Memory Management and Garbage Collection in Java Memory Management Basics Java uses an automatic memory management system that divides memory into several areas, primarily: Heap Memory: Where all objects and class instances are allocated. Stack Memory: Stores local variables and method call information. The JVM Heap is the main area managed during runtime, and it’s …
