Java Equality: Strings play a very important role in programming in every language. In Java, the string manipulation is simplified, by the Designers, by adding more methods in String class. One such method is equals(). Strings can be compared in Java in two ways using equals() method and logical ==. Let us see their difference …
Current Time Millis: To know the performance or speed of doing a task, the designers added currentTimeMillis() method in System class, that too as static so that programmer can call the method without object creation. Following is the method signature of Current Time Millis as defined in the System class. public static native long currentTimeMillis(); …
System gc: One of the salient features of Java is implicit garbage collection. Removing unwanted objects in running program is known as garbage collection. Due to the garbage collection, RAM memory is freed and the same freed memory can be used by OS for other purposes. Due to implicit garbage collection, Java does not support …
Java Exit: In coding, sometimes, Java programmer may need to terminate the running program (application) if the required condition is not met. Or, at the will of the user (when user wants), the program should get terminated; like when the user clicks a button, the game program should end (terminate) and come out of the …
We know basically Java does not support multiple inheritance. But supports partially through interfaces. Interfaces were introduced just to support multiple inheritance. This tutorial explains inheritance styles with interfaces, inheritance between interfaces and Interface extend Interface. One principle in inheritance is after extends there must come only one either concrete class or abstract class. But …
JDK 1.3 gives two classes java.util.Timer and java.util.TimerTask and are generally used in combination with threads to generate events at regular intervals. Following is the link from this same Web site illustrating Timer and TimerTask with example Timer and TimerTask Would you like to know the Observer and Observable? classes Observer and Observable
You are the creator of the thread and you must have full control over the thread, either for inactivation and then again activation or killing. For Thread Stop or killing a thread, stop() method of Thread class is used. Following program illustrates on Thread Stop. public class Demo extends Thread { // d1 should be …
General thread methods in Java, the Programmer mostly uses are sleep(), getName(), setName(), setPriority(), join() etc. Thread class comes with more methods like isAlive(), activeCount(), setDaemon() etc. These methods are discussed herewith. public class ThreadMethods { public static void main(String args[]) { // THREAD NAME METHODS Thread newThread = new Thread(); System.out.println(“newThread default name: ” …
Different states in which a thread exists in its life is known as life cycle of thread. The life period comprises of interval of time between thread object creation and garbage removal. Similarly there comes applet life cycle and servlet life cycle also. Following link gives you a diagrammatic explanation on the life cycle of …
The sleep(long inactivateTime) method takes a parameter of how much time the thread should be inactivated (sent to blocked state). The advantage of sleep() method is the thread comes into activation (getting into runnable state) when the inactivateTime is over automatically. When the inactivation time of a thread is not known at compile time and …
The important concept of threads, in any language, is synchronization. Synchronization plays an important role when multiple threads access the same data source. For example, one bank account can be accessed by all the partners of a business as it is a joint account. Here programmer should be very careful in his multithreaded program. To …
After knowing lightweight and hevyweight threads and thread priorities, let us know an important concept that comes in threads – Synchronization. Synchronization, its English meaning is, to place the events in an order or to do the jobs in a sequence (order). Generally, one thread acts one source of data at a time like your …
After knowing how to create and run threads and heavy and light weight threads, it is the time to prioritize threads. A thread in Java can be given a priority within the range from 1 to 10. If no priority is given, the thread takes a default priority of 5. Two methods exist in Thread …
After going through the Threads Tutorial and Basics of Java Threads, we have seen how to create threads, start threads and sleep (inactivate) threads in Creating and Spawning Threads. In Creating and Spawning Threads program, only one thread is created and executed. Now let us create two threads and activate them simultaneously. Also to learn, …
It is the time to prove that threads manipulation is easy in Java. Infact, many difficult concepts like graphics, networking and data structures (without pointers) are made simple by Java designers. Threads, unlike in other languages, are simpler to manipulate in Java like creation, inactivation, killing and inter-communication etc. due to just 4 predefined classes …
Threads, unlike in other languages, are easier to manipulate in Java like creation, inactivation, killing and inter-communication etc. due to just 4 predefined classes – Thread, Runnable interface, ThreadGroup and Object. Note: It is advised to go through the Tutorial on Threads and Thread Basics before going further into the study of threads indepth. Following …
In Java thread is creation is a very easy task due to Thread class and Runnable interface. By extending either Thread class or implementing Runnable interface, you can create a single thread or multiple threads. Note: Before going further it is advised to go through the Multithreading – Concepts and Java Thread Basics Following link …
Note: Before going further it is advised to go through the Multithreading – Concepts and Java Thread Basics In Java threads can be created in two ways – by extending Thread class and implementing Runnable interface. Both programs are given in the following links. 1. Creating and Spawning Threads For all programs on multithreading 1. …
Multithreading in a programming language is very difficult, the learners of C/C++ think always. Not only threads, even they think difficult the concepts like graphics, chat program and image drawing etc. Infact, an institute teaching C/C++ does not teach these concepts because they assume it is very difficult. But in Java, all these very very …
A language Learner thinks if his program compiles, he is sure of getting output. Ofcourse, he is right as he is at the beginning of learning. By the time he completes learning, he understands what is Java Exception and why his program does not run and give output even when successfully compiled. Let us go …
