how to execute a jacop?

Reya · 2010-09-13T19:38:55+00:00

Hi fnds,do anybody know how to execute the java constraint program in netbeans 6.8? i searched in google but i could not find out..

how to execute a jacop?

Reya
@reya-SMihdC

Updated: Oct 22, 2024

Views: 1.9K

Hi fnds,do anybody know how to execute the java constraint program in netbeans 6.8? i searched in google but i could not find out..

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Manish Goyal

Member • Sep 13, 2010

Sory didn't get you
what do you mean by java constraint program?

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Reya

Member • Sep 13, 2010

The constraint programming approach is to search for the values of all the unknown variables in which the large no of constraints should be satisfied at the same time.JaCoP library provides
the constraint programming implemeted in java..And so it is called as java constraint program.

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Manish Goyal

Member • Sep 13, 2010

have you set the class path?

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Reya

Member • Sep 13, 2010

what for class path here?do v have to mention the class path in netbeans?

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Reya

Member • Sep 13, 2010

I have included the JaCoP library in netbeans..But still i get the error in the first line(import JaCoP -3.0-RC1.*; )of my prog.

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Manish Goyal

Member • Sep 13, 2010

Tell me exactly the error message it is showing ,if it is showing message like

package doesnot exist then I think there is problem related to classpath otherwise there may be some syntax related problem

Try this
import JaCop.*;
or import JaCop.core.*;

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Reya

Member • Sep 14, 2010

i didnt get the error as package doesnt exists..

import JaCoP-3.0-RC1.*;
import java.util.*;
public class Main {
static Main m = new Main ();
public static void main (String[] args) {
FDstore store = new FDstore(); // define FD store
int size = 4;
// define FDVs
FDV[] v = new FDV[size];
for (int i=0; i<size; i++)
v = new FDV(store, "v"+i, 1, size);
// define constraints
store.impose( new XneqY(v[0], v[1]) );
store.impose( new XneqY(v[0], v[2]) );
store.impose( new XneqY(v[1], v[2]) );
store.impose( new XneqY(v[1], v[3]) );
store.impose( new XneqY(v[2], v[3]) );
// search for a solution and print results
ArrayList<FDV> list = new ArrayList<FDV>();
for(FDV var : v) list.add(var);
boolean result = Solver.searchOne(store, list, new SearchOne(),new IndomainMin(), new Delete());
if ( result )
System.out.println("Solution: " + list + "\n*** Yes");
else
System.out.println("*** No");
}
}

error message:

E:\Documents and Settings\SSN\My Documents\NetBeansProjects\JavaApplication15\src\javaapplication15\Main.java:8: '.' expected
import JaCoP-3.0-RC1.*;
E:\Documents and Settings\SSN\My Documents\NetBeansProjects\JavaApplication15\src\javaapplication15\Main.java:8: <identifier> expected
import JaCoP-3.0-RC1.*;
2 errors
E:\Documents and Settings\SSN\My Documents\NetBeansProjects\JavaApplication15\nbproject\build-impl.xml:413: The following error occurred while executing this line:
E:\Documents and Settings\SSN\My Documents\NetBeansProjects\JavaApplication15\nbproject\build-impl.xml:199: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)

where that dot should come in the first statement?i could not recognise..

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Reya

Member • Sep 15, 2010

can anyone help me?

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Manish Goyal

Member • Sep 15, 2010

I don't have any idea about syntax and classes of JaCop library

So i picked a program from net and it is working fine on my PC
check whether the code that i given below is working fine or not

if not then the problem is with class path

import JaCoP.core.*; 
import JaCoP.constraints.*; 
import JaCoP.search.*; 
 
public class Main { 
 
    static Main m = new Main (); 
 
    public static void main (String[] args) { 
        Store store = new Store();  // define FD store 
        int size = 4; 
        // define finite domain variables 
        IntVar[] v = new IntVar[size]; 
        for (int i=0; i<size; i++) 
            v[i] = new IntVar(store, "v"+i, 1, size); 
        // define constraints 
        store.impose( new XneqY(v[0], v[1]) ); 
        store.impose( new XneqY(v[0], v[2]) ); 
        store.impose( new XneqY(v[1], v[2]) ); 
        store.impose( new XneqY(v[1], v[3]) ); 
        store.impose( new XneqY(v[2], v[3]) ); 
 
        // search for a solution and print results 
        Search<IntVar> search = new DepthFirstSearch<IntVar>(); 
        SelectChoicePoint<IntVar> select = 
            new InputOrderSelect<IntVar>(store, v, 
                                         new IndomainMin<IntVar>()); 
        boolean result = search.labeling(store, select); 
 
        if ( result ) 
            System.out.println("Solution: " + v[0]+", "+v[1] +", "+ 
                                              v[2] +", "+v[3]); 
        else 
            System.out.println("*** No"); 
    } 
}            T

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Reya

Member • Sep 15, 2010

working perfectly😀thank u so much dear😀

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