isLong - Maple Help

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Numeric.isLong

check if the value stored in the Numeric fits into a Java long

 

Calling Sequence

Description

Examples

Calling Sequence

boolean isLong() throws MapleException

Description

• 

The isLong function returns true if the value represented by the current Numeric object is an integer small enough to fit into a Java long. Otherwise, the isLong function returns false.

• 

If isLong returns true, a call to longValue completes without error.

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 );

        Numeric n = (Numeric)engine.evaluate( "2^66:" );

        System.out.println( n.isLong() );

        try

        {

            n.longValue();

        }

        catch ( MapleException me )

        {

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

        }

        n = (Numeric)engine.evaluate( "2^60:" );

        System.out.println( n.isLong() );

        long l = n.longValue();

        System.out.println( l );

    }

}

Executing this code produces the following output.

false

Error, value too large for integer[8]

true

1152921504606846976

See Also

ExternalCalling/Java/MapleException

OpenMaple

OpenMaple/Java/API

OpenMaple/Java/Numeric

OpenMaple/Java/Numeric/isByte

OpenMaple/Java/Numeric/isInt

OpenMaple/Java/Numeric/isInteger

OpenMaple/Java/Numeric/isShort

OpenMaple/Java/Numeric/longValue