Relation.evalBoolean
evaluate a relation to a Boolean value
Calling Sequence
Description
Examples
Compatibility
Algebraic evalBoolean() throws MapleException
The evalBoolean method evaluates the associated Relation object to a true or false value.
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:" );
}
catch ( MapleException me )
System.out.println( me.getMessage() );
Executing this code produces the following output.
false
true
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
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