Relation.evalBoolean - Maple Programming Help

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Relation.evalBoolean

evaluate a relation to a Boolean value

 

Calling Sequence

Description

Examples

Compatibility

Calling Sequence

Algebraic evalBoolean() throws MapleException

Description

• 

The evalBoolean method evaluates the associated Relation object to a true or false value.

Examples

import com.maplesoft.openmaple.*;

import com.maplesoft.externalcall.MapleException;

class Example

{

    public static void main( String notused[] ) throws MapleException

    {

        String[] mapleArgs = { "java" };

        Engine engine = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null );

        Relation rel;

        try

        {

            rel = (Relation)engine.evaluate( "2*x + 3*y <= 5:" );

            System.out.println( rel.evalBoolean() );

            rel = (Relation)engine.evaluate( "2 + 3 > 0:" );

            System.out.println( rel.evalBoolean() );

        }

        catch ( MapleException me )

        {

            System.out.println( me.getMessage() );

        }

    }

}

Executing this code produces the following output.

false

true

Compatibility

• 

The Relation.evalBoolean command was introduced in Maple 2018.

• 

For more information on Maple 2018 changes, see Updates in Maple 2018.

See Also

ExternalCalling/Java/MapleException

OpenMaple

OpenMaple/Java/API

OpenMaple/Java/Relation