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Numeric.isLong - check if the value stored in the Numeric fits into a Java long
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Calling Sequence
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boolean isLong() throws MapleException
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Description
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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.
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If isLong returns true, a call to longValue completes without error.
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Examples
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import com.maplesoft.openmaple.*;
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import com.maplesoft.externalcall.MapleException;
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class Example
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{
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public static void main( String notused[] ) throws MapleException
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{
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String mapleArgs[];
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Engine engine;
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Numeric n;
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long l;
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mapleArgs = new String[1];
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mapleArgs[0] = "java";
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engine = new Engine( mapleArgs, new EngineCallBacksDefault(),
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null, null );
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n = (Numeric)engine.evaluate( "2^66:" );
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System.out.println( n.isLong() );
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try
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{
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n.longValue();
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}
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catch ( MapleException me )
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{
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System.out.println( me.getMessage() );
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}
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n = (Numeric)engine.evaluate( "2^60:" );
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System.out.println( n.isLong() );
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l = n.longValue();
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System.out.println( l );
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}
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}
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Executing this code produces the following output.
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false
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Error, value too large for integer[8]
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true
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1152921504606846976
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