Important features of Java
The following are some important features of Java Programming Language:
- Platform Independent
- Architectural Neutral
- Dynamic and Extensible
- Multi Threading
- High Performance
- Object Oriented
The Java language is easy to learn and its coding style is easy to read and write. It contains many features of other Languages like C and C++ and Java removes complexity because it doesn't use pointers and doesn't support Multiple Inheritance.
This is where the "Write Once, run anywhere" motto for Java comes in. It means that you can develop on one environment(Operating System) and run on another environment without doing any modification of the code.
More about.... Platform Independent of Java
Java application runs the same bytecodes regardless of any environment (Operating System). To enable a Java application to execute anywhere on the network, the compiler generates an architecture-neutral object file format.
Dynamic and Extensible
Java has Dynamic and Extensible means with the help of OOPS you can add classes and plug in new methods to classes, creating new classes through sub classes. This makes Java very easy to augment with your own classes or even to modify.
Java programs can execute in any environment (Linux,Window,Mac etc.) for which there is a Java run-time system (JVM). That really means there is no implementation dependent features.
Java supports Multithreading. Multithreading means handling more than one job at a time, so get more process get done in less time than it could with just one thread.
Java was designed with the distributed environment. It has networking facilities, so it can be transmit, run over internet. for ex. RMI and EJB are used for creating distributed applications.
Java is mainly designed for web based applications. Java masks lot of complexity by providing classes for you that already implements the hard parts, such as creating socket connections, reading the contents of the URL as a file etc. Moreover, J2EE is used for developing network based applications.
Robust simply means strong. Its capability to handle Run-time Error, automatic garbage collection, the lack of pointer concept, Exception Handling etc. makes java robust.
The Java platform is designed with security features built into the language and runtime system such as Bytecode verification for distrusted code, support for authentication and privacy etc. Java program always runs in Java runtime environment with almost null interaction with OS, hence it is more secure.
Although Java is an interpreted language, it was designed to support "just-in-time" compilers, which dynamically compile bytecodes to machine code. Bytecodes are highly optimized, so Java Virtual Machine can executed them much faster.
Java supports Inheritance, encapsulation and polymorphism, the three major Object Oriented constructs that distinguish a language as Object-Oriented.
- Java Interview Questions-Core Faq - 1
- Java Interview Questions-Core Faq - 2
- Java Interview Questions-Core Faq - 3
- What is the difference between JDK and JRE?
- What gives Java its 'write once and run anywhere' nature?
- What is JVM and is it platform independent?
- What is Just-In-Time (JIT) compiler?
- What is the garbage collector in Java?
- What is NullPointerException in Java
- Difference between Stack and Heap memory in Java
- How to set the maximum memory usage for JVM?
- What is numeric promotion?
- Why do we need Generic Types in Java?
- What does it mean to be static in Java?
- What are final variables in Java?
- How Do Annotations Work in Java?
- How do I use the ternary operator in Java?
- What is instanceof keyword in Java?
- How ClassLoader Works in Java?
- What are fail-safe and fail-fast Iterators in Java
- What are method references?
- "Cannot Find Symbol" compile error
- Difference between system.gc() and runtime.gc()
- How to convert TimeStamp to Date in Java?
- Does garbage collection guarantee that a program will not run out of memory?
- How setting an Object to null help Garbage Collection?
- How do objects become eligible for garbage collection?
- How to calculate date difference in Java
- Difference between Path and Classpath
- Is Java "pass-by-reference" or "pass-by-value"?
- Difference between static and nonstatic methods java
- Why Java does not support pointers?
- What is package in Java?
- What are wrapper classes?
- What is singleton class in Java?
- Difference between Java Local Variable, Instance Variable and a Class Variable?
- Can a top level class be private or protected in java
- Are Polymorphism , Overloading and Overriding similar concepts?
- How to Use Locks in Java
- Why Multiple Inheritance is Not Supported in Java
- Why Java is not a pure Object Oriented language?
- Why can't a Java class be declared as static?
- Difference between Abstract class and Interface in Java
- Why do I need to override the equals and hashCode methods in Java?
- Why does Java not support operator overloading?
- What’s meant by anonymous class in Java?
- Static Vs Dynamic class loading in Java
- Why am I getting a NoClassDefFoundError in Java?
- How to generate random integers within a specific range in Java
- What's the meaning of System.out.println in Java?
- What is the purpose of Runtime and System class?
- What is finally block in Java?
- What is difference between final, finally and finalize?
- What is try-with-resources in java?
- What is a stacktrace?
- What is the meaning of immutable in terms of String?
- What are different ways to create a string object in Java?
- Difference between String and StringBuffer/StringBuilder in Java
- What is the difference between creating String as new() and literal?
- How do I convert String to Date object in Java?
- How do I create a Java string from the contents of a file?
- What actually causes a StackOverflow error in Java?
- Why is char preferred over String for storage of password in Java
- What is I/O Filter and how do I use it in Java?
- Serialization and Deserialization in Java
- Understanding transient variables in Java
- What is Externalizable in Java?
- What is the purpose of serialization/deserialization in Java?
- What is the Difference between byte stream and Character streams
- How to append text to an existing file in Java
- Read/convert an InputStream to a String in Java
- What is the difference between Reader and InputStream in Java
- Introduction to Java threads
- What is synchronization Java?
- Static synchronization Vs non static synchronization in Java
- Java Thread Deadlock Tutorial
- What is Daemon thread in Java
- Difference between implements Runnable and extends Thread in Java
- What is the volatile keyword in Java
- What are the basic interfaces of Java Collections Framework
- What are the differences between ArrayList and Vector in Java
- What is the difference between ArrayList and LinkedList?
- What is the difference between List and Set in Java
- Difference between HashSet and HashMap in Java
- Difference between HashMap and Hashtable in Java?
- How does the hashCode() method of java works?
- Difference between capacity() and size() of Vector in Java