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Index › Programming Questions & Help › Syntax Questions › Calling ProcessBuilder on Mac generates error
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Calling ProcessBuilder on Mac generates error (Read 810 times)
ArthurClemens
Calling ProcessBuilder on Mac generates error
Sep 15th, 2007, 4:32pm  
I have a few lines of code to call an external application:

     ProcessBuilder processBuilder = new ProcessBuilder(cmd);
     File file = new File(mApplet.sketchPath(""));
     processBuilder.directory(file);              
     process = processBuilder.start();

On Windows this works as expected, but on Mac the same file won't compile and gives the error:
Semantic Error: Type "ProcessBuilder" was not found.

ProcessBuilder is available since Java 1.5, and "java -version" returns "1.5.0_07", so that should be ok.
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ArthurClemens
Re: Calling ProcessBuilder on Mac generates error
Reply #1 - Sep 15th, 2007, 6:46pm  
Not a solution but a different way to get the same results:

     File dir = new File(mApplet.dataPath(""));
     Runtime rt = Runtime.getRuntime();
     process = rt.exec(cmd, null, dir);
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fjen
Re: Calling ProcessBuilder on Mac generates error
Reply #2 - Sep 15th, 2007, 7:07pm  
hmm ... you can verify that processing / your sketch uses 1.5 with:
Code:

println( System.getProperty("java.version") );


have you tried with standard java? make a simple class with your processbuilder thing in it and try to compile that outside of processing ..

Code:

public class MyTest {
  ProcessBuilder pb;
}


put in "MyTest.java" and run
javac MyTest.java
in the files directory with terminal

if that gives any errors it should not be a processing problem.

F
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ArthurClemens
Re: Calling ProcessBuilder on Mac generates error
Reply #3 - Sep 15th, 2007, 8:43pm  
Processing returns as version: 1.5.0_07.

The test class compiles without any errors. This points to a bug in Processing.
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fjen
Re: Calling ProcessBuilder on Mac generates error
Reply #4 - Sep 15th, 2007, 10:38pm  
no clue whats wrong, testing against jikes gives no error too:

Code:

cd /Applications/Processing\ 0125/
./jikes -classpath /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/classes.jar ~/Desktop/MyTest.java


maybe ben has an idea ..

F
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