Java Class getInterfaces() Method
The getInterfaces() method in Java, part of the java.lang.Class class, is used to retrieve an array of Class objects representing the interfaces implemented by the class or interface represented by the Class object.
Java Class getFields() Method
The getFields() method in Java, part of the java.lang.Class class, is used to retrieve an array of Field objects representing all the public fields of the class or interface represented by the Class object.
Java Class getField() Method
The getField() method in Java, part of the java.lang.Class class, is used to retrieve a specific public field of the class or interface represented by the Class object.
Java Class getEnumConstants() Method
The getEnumConstants() method in Java, part of the java.lang.Class class, is used to retrieve an array of the enum constants of the specified enum type represented by the Class object.
Java Class getDeclaredMethods() Method
The getDeclaredMethods() method in Java, part of the java.lang.Class class, is used to retrieve an array of Method objects representing all the methods declared by the class or interface represented by the Class object.
Java Class getDeclaredFields() Method
The getDeclaredFields() method in Java, part of the java.lang.Class class, is used to retrieve an array of Field objects representing all the fields declared by the class or interface represented by the Class object.
Java Class getDeclaredField() Method
The getDeclaredField() method in Java, part of the java.lang.Class class, is used to retrieve a specific field declared by the class represented by the Class object.
Java Class getConstructors() Method
The getConstructors() method in Java, part of the java.lang.Class class, is used to retrieve all public constructors of the class represented by the Class object.
Java Class getConstructor() Method
The getConstructor() method in Java, part of the java.lang.Class class, is used to retrieve a specific public constructor of the class represented by the Class object.
Java Class getCanonicalName() Method
The getCanonicalName() method in Java is part of the java.lang.Class class. It is used to retrieve the canonical name of the class or interface represented by the Class object.
Java Class getAnnotation() Method
The getAnnotation() method in Java, part of the java.lang.Class class, is used to retrieve a specific annotation from a class if it is present.
Java Class getAnnotatedInterfaces() Method
The getAnnotatedInterfaces() method in Java, part of the java.lang.Class class, is used to obtain an array of AnnotatedType objects representing the interfaces directly implemented by the class or interface represented by the Class object.
Java WeakHashMap Class
Introduction The WeakHashMap class in Java, part of the java.util package, is a hash table-based implementation of the Map interface with weak keys. Entries in a WeakHashMap are automatically removed when their keys are no longer in ordinary use, which allows for better memory management and helps avoid memory leaks in certain scenarios.
Java UUID Class
Introduction The UUID class in Java, part of the java.util package, is used to generate and manipulate Universally Unique Identifiers (UUIDs). A UUID is a 128-bit value used for uniquely identifying information in distributed systems without significant central coordination. The UUID class provides methods to create, convert, and work with UUIDs.
Java StringTokenizer Class
Introduction The StringTokenizer class in Java, part of the java.util package, is a legacy class used to break a string into tokens. It is a simple and fast way to tokenize a string, splitting it into smaller parts based on delimiters. Although it is a legacy class, it is still widely used for simple tokenization …
Java StringJoiner Class
Introduction The StringJoiner class in Java, part of the java.util package, is used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix. It was introduced in Java 8 as a utility to make it easier to create delimited strings, particularly useful …
Java Stack Class
Introduction The Stack class in Java, part of the java.util package, represents a last-in-first-out (LIFO) stack of objects. It extends the Vector class with five operations that allow a vector to be treated as a stack. The Stack class provides methods to push and pop elements, as well as to peek at the top element, …
Java Spliterator Interface
Introduction The Spliterator interface in Java, part of the java.util package, is used to traverse and partition elements of a source. It is designed to be used in parallel processing and provides a more efficient way to process elements compared to the traditional iterator. The name Spliterator is a combination of "split" and "iterator," emphasizing …
Java SortedSet Interface
Introduction The SortedSet interface in Java, part of the java.util package, represents a set that maintains its elements in ascending order. This interface extends the Set interface and provides methods for navigation and retrieving subsets. The most commonly used implementation of SortedSet is TreeSet.
Java SortedMap Interface
Introduction The SortedMap interface in Java, part of the java.util package, is a specialized map that maintains its entries in ascending key order. This interface extends the Map interface and adds methods that provide navigation and sorted views of the map. The most commonly used implementation of SortedMap is TreeMap.
Java Set Interface
Introduction The Set interface in Java, part of the java.util package, is a collection that does not allow duplicate elements. It models the mathematical set abstraction, providing operations to add, remove, and query elements. Common implementations include HashSet, LinkedHashSet, and TreeSet.
Java SequencedSet Interface
Introduction The SequencedSet interface in Java, introduced in Java 21, is part of the java.util package. It extends the Set interface and provides methods to access elements in a sequence, focusing on maintaining and accessing elements in a specific order, such as insertion order.
Java SequencedMap Interface
Introduction The SequencedMap interface in Java, introduced in Java 21, is part of the java.util package. It extends the Map interface and provides methods to access elements in a sequence, focusing on maintaining and accessing elements in a specific order, such as insertion order.
Java SequencedCollection Interface
Introduction The SequencedCollection interface in Java, introduced in Java 21, is part of the java.util package. It extends the Collection interface and provides methods to access elements in a sequence, specifically focusing on maintaining and accessing elements in a specific order, such as insertion order.
Java Scanner Class
Introduction The Scanner class in Java, part of the java.util package, is a utility class used to parse primitive types and strings using regular expressions. It can read input from various sources, including strings, files, and input streams. The Scanner class is widely used for reading user input in console applications.