Multiple compiled instances of same Java program

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Java Class Files filename$1.class… etc Question

I wrote a batch file to compile the java program and execute it. When I open the file location (via GUI), I see many .class files of the same file.

For example, say I have a file called "acView.java"

I see 3 compiled .class files - "acView$1.class" "acView$2.class" and "acView.class"

What do the $1 and $2 stand for? Why are they present?

The .java file is a JFrame if that's important.

Pau Kiat Wee · Accepted Answer · 2012-12-19T04:19:14.087

1

The $1 simply means that class is an anonymous class and the number 1 is generated by the compiler. When you have two anonymous classes, it will have something like YourClass$1.class and YourClass$2.class in the compiled classes.

From your code, I believe you are implementing some Listener anonymously.

If you dont want compiler generate multiple classes, you move the code to normal class.

edited Dec 19 '12 at 04:19

answered Dec 19 '12 at 04:13

Pau Kiat Wee

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Could elucidate a little more or provide a link with detailed information? Yes! I'm implementing a clickListener to a button. So, more listeners more "anonymous" classes? – Karthik Balakrishnan Dec 19 '12 at 04:14
@Torcellite Correct, most probably you implement anonymously. – Pau Kiat Wee Dec 19 '12 at 04:15
Is there a way to avoid this? – Karthik Balakrishnan Dec 19 '12 at 04:16
2

Yes, don't define classes scoped by a top level class. But the real question is why would you want to avoid it. – alphazero Dec 19 '12 at 04:18
Just curiosity. I wanted to know if there was a solution. – Karthik Balakrishnan Dec 19 '12 at 04:19
@Torcellite there is no problem at all, spend more time on other bugs :) – Pau Kiat Wee Dec 19 '12 at 04:20

Multiple compiled instances of same Java program

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