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How dynamically createload new classes in java?


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I have a simpe Swing application for drawing different shapes (circle, triangle, square and etc.). It works like that: you have to choose shape type, click somewhere in the apllication window and get the chosen shape drawn where you clicked. And I have to add a functionality that allows to add new shapes (classes) on the runtime via plugin.



Plugin is a file that somehow describes a new shape (class) and its functionality and exists somewhere in the system (in some folder).



My question: what is the best way to implement this? What approaches, libraries and sources can you recommend?



I have found some information about JPF (Java Plug-in Framework), but I'm not sure that this is what I need becaust it looks quite enormous and seems to be used for other purposes (maybe I'm wrong).



Thank you.










share|improve this question
























  • I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

    – ControlAltDel
    Mar 27 at 17:43











  • You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

    – dnault
    Mar 27 at 19:22

















0















I have a simpe Swing application for drawing different shapes (circle, triangle, square and etc.). It works like that: you have to choose shape type, click somewhere in the apllication window and get the chosen shape drawn where you clicked. And I have to add a functionality that allows to add new shapes (classes) on the runtime via plugin.



Plugin is a file that somehow describes a new shape (class) and its functionality and exists somewhere in the system (in some folder).



My question: what is the best way to implement this? What approaches, libraries and sources can you recommend?



I have found some information about JPF (Java Plug-in Framework), but I'm not sure that this is what I need becaust it looks quite enormous and seems to be used for other purposes (maybe I'm wrong).



Thank you.










share|improve this question
























  • I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

    – ControlAltDel
    Mar 27 at 17:43











  • You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

    – dnault
    Mar 27 at 19:22













0












0








0








I have a simpe Swing application for drawing different shapes (circle, triangle, square and etc.). It works like that: you have to choose shape type, click somewhere in the apllication window and get the chosen shape drawn where you clicked. And I have to add a functionality that allows to add new shapes (classes) on the runtime via plugin.



Plugin is a file that somehow describes a new shape (class) and its functionality and exists somewhere in the system (in some folder).



My question: what is the best way to implement this? What approaches, libraries and sources can you recommend?



I have found some information about JPF (Java Plug-in Framework), but I'm not sure that this is what I need becaust it looks quite enormous and seems to be used for other purposes (maybe I'm wrong).



Thank you.










share|improve this question














I have a simpe Swing application for drawing different shapes (circle, triangle, square and etc.). It works like that: you have to choose shape type, click somewhere in the apllication window and get the chosen shape drawn where you clicked. And I have to add a functionality that allows to add new shapes (classes) on the runtime via plugin.



Plugin is a file that somehow describes a new shape (class) and its functionality and exists somewhere in the system (in some folder).



My question: what is the best way to implement this? What approaches, libraries and sources can you recommend?



I have found some information about JPF (Java Plug-in Framework), but I'm not sure that this is what I need becaust it looks quite enormous and seems to be used for other purposes (maybe I'm wrong).



Thank you.







java dynamic plugins runtime






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 27 at 17:38









CoffemanzCoffemanz

436 bronze badges




436 bronze badges















  • I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

    – ControlAltDel
    Mar 27 at 17:43











  • You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

    – dnault
    Mar 27 at 19:22

















  • I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

    – ControlAltDel
    Mar 27 at 17:43











  • You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

    – dnault
    Mar 27 at 19:22
















I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

– ControlAltDel
Mar 27 at 17:43





I would put the custom shape classes in a jar, and implement functionality in your main app to select and load the jar (see URLClassLoader). You can also inspect the classes in the jar using the example given here: stackoverflow.com/questions/3429275/…

– ControlAltDel
Mar 27 at 17:43













You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

– dnault
Mar 27 at 19:22





You could use ServiceLoader as described in the docs for [Creating Extensible Applications ](docs.oracle.com/javase/tutorial/ext/basics/spi.html).

– dnault
Mar 27 at 19:22












1 Answer
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Java can have a feature called reflection API. By using this, you can create objects dynamically at run time. We can call their methods at runtime






share|improve this answer

























  • Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

    – Coffemanz
    Mar 27 at 17:50











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Java can have a feature called reflection API. By using this, you can create objects dynamically at run time. We can call their methods at runtime






share|improve this answer

























  • Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

    – Coffemanz
    Mar 27 at 17:50
















0















Java can have a feature called reflection API. By using this, you can create objects dynamically at run time. We can call their methods at runtime






share|improve this answer

























  • Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

    – Coffemanz
    Mar 27 at 17:50














0














0










0









Java can have a feature called reflection API. By using this, you can create objects dynamically at run time. We can call their methods at runtime






share|improve this answer













Java can have a feature called reflection API. By using this, you can create objects dynamically at run time. We can call their methods at runtime







share|improve this answer












share|improve this answer



share|improve this answer










answered Mar 27 at 17:49









Manjunath Jogi H kManjunath Jogi H k

11 bronze badge




11 bronze badge















  • Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

    – Coffemanz
    Mar 27 at 17:50


















  • Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

    – Coffemanz
    Mar 27 at 17:50

















Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

– Coffemanz
Mar 27 at 17:50






Yeah, I know about reflection. But what if a plugin not just a java class. Let's say it has some custom format.

– Coffemanz
Mar 27 at 17:50









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