APPLET LIFE CYCLE IN JAVA: What is the applet life cycle in Java?
A Java Applet, when loaded into the browser, goes through a sequence of four states. These four states are as follows:
An applet is a program that runs in the browser.
An applet is a program that runs in the browser. It has its own memory space and can perform tasks such as creating windows, receiving input from the user, displaying graphics and text on screen, etc. Applets are written in Java and compiled into bytecode before being downloaded to your computer by a web server when you request an HTML page with an embedded applet tag in it (e.g., ). The browser then uses another Java Virtual Machine (JVM) installed on your computer to execute the bytecode contained within this APPLET tag..
The life cycle of an applet can be divided into four states.
- State 1: Loading
In this state, the applet is being loaded into memory from its source file and compiled into bytecode.
- State 2: Running (or Ready)
In this state, the applet has been loaded into memory and initialized but hasn’t started executing any code yet. This is where you would put any initialization statements that need to happen before your applet starts running its main() method or other methods. For example, if you’re creating a GUI interface for your program with Swing components or AWT ones (like buttons), putting these things together in their correct locations on screen might be something that needs to happen here rather than later when the user clicks or types something into one of them
State 3: Active
This is the actual running state of your applet. Its code has started executing and it’s responding to user input, updating the screen as needed. This is where you’d put any code that needs to be executed while your applet is running.
The different states of an applet are as follows:
- init – This is the first state of an applet, in which it is created. This is done by calling the init() method on Applet.
- start – Once initialized, you can call start() to start running your applet. This will make it visible on screen and run any code inside its main().
- stop – If you want to stop your running applet before it goes into destroy state (i.e., when all memory has been released), then call its stop() method instead of destroy(). The only difference between stop and destroy is that stop may take some time while destroying all resources instantly without waiting for them to be reused by other processes which could cause unpredictable results if done improperly
A Java Applet, when loaded into the browser, goes through a sequence of four states.
- Uninitialized state – The applet has been loaded into the browser, but not yet initialized. This is the default state of an applet before it is initialized.
- Ready state – The applet has been loaded and initialized successfully and is ready to run when called upon by its parent HTML page or another Java object (such as another Applet).
- Running state – The code associated with this Applet instance is currently executing on your computer’s CPU(s), possibly interacting with other running code such as that from other Applets or applications you have open at the same time (like a browser). This could also be referred to as “active”, since active processes consume resources like memory and CPU cycles which may affect performance if too many things start running at once!
These four states are as follows:
- The loading state – In this state, the applet has been loaded into the browser but it is not yet ready to run. This can happen if you don’t specify any parameters or if there are errors while loading the applet.
- The ready state – In this state, all necessary resources have been loaded and the applet is ready to start running on your computer or mobile device (if applicable). You can also use this time to initialize variables within your program before starting execution at step 3 below!
- The running state – After entering this stage it means that everything has gone smoothly so far! Now all that’s left is for us humans (or machines) so sit back relax while our program runs its course 🙂
- The destroyed state – If something were wrong during execution then maybe something went wrong here too? For example maybe someone accidentally closed out their browser window without realizing what they were doing? Or maybe even worse…maybe someone deleted some files off their hard drive by mistake…either way we’ll never know because once again there will be no trace left behind us except perhaps some error messages printed out onto paper which nobody reads anyway so whatever happens happens…so yeah just keep calm cool head stay focused
There are four different states for every java applet.
The life cycle of an applet can be divided into four states:
- Created state – In this state, the applet is created and initialized.
- Ready state – In this state, the applet waits for a request from client (browser). Once it receives a request from client it goes to active state.
- Active state – This is when your applet gets executed by browser because it has been loaded into memory but not yet started executing code on its own thread (this happens only after you call start() method).
- Terminated State – If your application terminates due to some reason then it will enter into terminated stage where no further processing takes place
Answer ( 1 )
Are you curious about the inner workings of Java applets? Look no further! In this blog post, we’ll be diving deep into the applet life cycle in Java. From creation to execution, we’ll explore each stage and what it entails. Whether you’re a seasoned programmer or just starting out, understanding the applet life cycle is crucial for developing successful Java applications. So buckle up and let’s get started!
The applet life cycle in Java
The applet life cycle in Java refers to the stages that an applet goes through from its creation to execution. There are four main stages: initialization, start, paint and stop.
During the initialization stage, the applet is loaded into memory and all variables are initialized. This is where any necessary resources are allocated and configuration parameters are set.
Once initialization is complete, the start() method is called. This signals that the applet has started running and can begin performing its intended tasks.
The paint() method comes next, which handles visual output for the user. Here, graphics or images can be displayed onscreen according to how they should be rendered by a web browser.
When it’s time for an applet to stop running or exit out of viewable space entirely (such as due to user navigation), then there’s a stop() method call made which allows any cleanup work needed before exiting gracefully without leaving behind any residual data.
Understanding of these phases will help you develop successful Java applications with ease!
The different stages of the applet life cycle
The applet life cycle in Java consists of several stages that are crucial to the execution and operation of an applet. Understanding these stages is essential for any developer working with applets.
The first stage is the initialization stage, which involves setting up the environment for the applet. This includes initializing variables, loading images or sounds, and other necessary tasks.
After initialization comes the start() method where the applet begins executing its code. The start() method is called after initialization and every time a user visits the web page containing the applet.
During execution, events may occur that require handling by specific methods such as mouse clicks or key presses. These event-handling methods are triggered when their respective events occur.
As more users interact with an applet on a webpage, it goes through multiple cycles of execution. The stop() method is called whenever a user leaves a page containing an applet. This method frees resources used by an instance of an Applet class.
We have destruction – this is when all resources utilized during runtime are cleaned up by calling finalize().
How to create an applet in Java
Creating an applet in Java is a straightforward process that can be accomplished using any suitable IDE, such as Eclipse or NetBeans. To begin, you need to create a new project and then add a new class file for the applet.
Once you have created the class file, make sure it extends the Applet class since this is necessary for creating applets in Java. Then override the init() method of the Applet class so that you can initialize your applet with the necessary properties.
Next, create other methods like start(), stop(), and paint() to define what happens when your applet starts running, stops running or needs to be repainted respectively. Be sure to include all these methods in your code.
Compile your code and run it on any compatible browser by embedding it inside an HTML page using tags which specify attributes such as width, height etc.
With these few steps followed correctly your Java applet will be up and running!
How to run an applet in Java
In summary, the applet life cycle in Java involves several stages that must be understood to create and run applets successfully. By following the steps outlined in this article, you can create a basic applet and test it on your computer using a web browser or an integrated development environment.
Remember, Java is a versatile programming language used by developers worldwide for creating interactive applications across multiple platforms. Applets are just one example of how Java can be used to make engaging projects that are both functional and exciting.
With practice and patience, anyone can learn how to code using Java, so why not give it a try? With these tips in mind, you’ll be well on your way towards mastering the art of developing applets in no time!