Java-Tutorials

Java Tutorials - Best Java Tutorials Directory. Java is a portable object-oriented language developed by Sun Microsystems. Originally used mostly for web programming, it is now used primarily to develop large web-based applications. Find tutorials, example codes about Sun Java Technology.

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Java-Tutorials
Tutorial Annotations in Java
Annotations behave like metadata and provide data about a program that is not part of the program itself. They are used to associate program elements with the meta tags so that the compiler can generate interdependent code to support the annotated elements. Developing annotations helps in faster development of program. Multi-value annotations are used to pass the values to multiple data members. View Rating



Java-Tutorials
Tutorial J2EE Tutorial
This section is for those who want to write the fast, secure and reliable distributed transactional applications for the enterprise, e-commerce, and enterprises applications. In this section we will discuss what is J2EE, features of J2EE applications, J2EE tiered applications, Web Container, J2EE versions etc. View Rating



Java-Tutorials
Tutorial HashMap in Java
HashMap class is used to implement Map interface. The value of HashMap is stored using get() and put(). HashMap provides key-value access to data. HashMap is almost equal to HashTable, the only difference is that HashMap allows null value and is unsynchronized. HashMap does not guarantee the order of the map. This means that it is not necessary that the order in which the elements are read by Iterator is same to the order in which they were added. View Rating



Java-Tutorials
Tutorial Wrapper Class in Java
Wrapper classes provide object methods for the eight primitive data types in Java. If a method expects an Object but programmer needs to send in a primitive data type, it can only be achieved by using Wrapper Classes in Java. For example, if you want to store a mapping between an integer value 50 (int i = 50) to an Object wrapper classes must be used. View Rating



Java-Tutorials
Tutorial Java Tutorial
This tutorial covers all the topics of Java Programming language. In this section you will learn about what is Java, download java, Java environment set up, features of Java, keywords in Java, data types in Java, conventions in Java, Java identifiers, access specifiers, variables in Java, Java literals, Java operators, conditional statements, loops in Java. View Rating



Java-Tutorials
Tutorial Abstract Class in Java
Abstract class in Java is a class that is declared using abstract keyword. It cannot be instantiated but can be extended into subclass. Abstract class cannot be instantiated means that new instances of an abstract class cannot be created. When an abstract class is extended into subclass, the abstract method of abstract class must be defined in the subclass. View Rating



Java-Tutorials
Tutorial OOPs concepts in Java
Object-Oriented Programming (OOPs) concepts in Java helps in creating programs that are based on real world. OOPs is very flexible and compatible and hence is the most used concept in developing larger applications. The software application that are developed on the OOPs concepts at first analyze the program then prepare a solution, do the coding and then maintains it. View Rating



Java-Tutorials
Tutorial Array in Java
An Array is the static memory allocation that holds a fixed number of values of same type in memory. The size or length of an array is fixed when the array is created. Each item in an array is called an element. First element of an array starts with zero. Different types of array used in Java are One-dimensional, Two-dimensional and multi-dimensional. View Rating



Java-Tutorials
Tutorial How to write a file in Java?
How to write a file in Java? To write a file in Java use the class FileWriter and BufferedWriter. The FileWriter class is used to write data into output stream. However, one can specify these values by using OutputStreamWriter on a FileOutputStream. There are various constructors of FileWriter class that allows data writing in output stream in various ways. View Rating



Java-Tutorials
Tutorial Threads in Java
Threads in Java help in multitasking. They can stop or suspend a specific running process and start or resume the suspended processes. This helps in increasing the speed of the processes. In Java programming, Java Virtual Machine (JVM) controls the life-cycle of thread. Different states of Thread during its life-cycle are New State, Ready-to-Run, Running and Dead (Terminated) etc. View Rating
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