How to create a method out of the text file?

Question

I have a text (.txt) file that contains Java code! I want to create a method that includes this Java code and then call that method through the program.

Can anybody suggest a way to do this?

Answer 1

let consider this example what it does actually load the source code, compile and execute the java code by simpler program by using JavaCompiler API.

Answer 2

Use the JavaCompiler. It can compile code from a String, so I'm sure it could handle code from a text file.

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Do you think instead of putting it in the main method I can put it in for example test method and call method like this?

Put it wherever you like. E.G. see the STBC & especially the source code. It provides a GUI and can compile the code in the text area on button click.

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this program need tools.jar but jre 7 doesnt have this!!

Did you try reading the documentation that is provided for the STBC? Notably:

System Requirements

STBC will run on any computer with a version 1.6+ Java Plug-In* JDK (AKA SDK).

(*) The API that STBC uses is merely a public interface to the compiler in the tools.jar that is distributed only with JDKs (though the 'public JRE' of the JDK also seems to acquire a tools.jar). This leads to some unusual requirements in running either the native jar, or the web start app.

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Or shorter, no JRE will have a JavaCompiler, only JDKs have them.

Answer 3

1. Change the .txt file to a .java file,
2. add it to your java project
3. Compile the code
4. Execute the methods

Answer 4

Load the file in through standard java IO and then have Groovy evaluate it for you:

http://groovy.codehaus.org/Embedding+Groovy

Answer 5

it's something like quine: http://www.nyx.org/%7Egthompso/quine.htm