大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				package org.codehaus.groovy.runtime;								/**				 * BigInteger NumberMath operations				 * 				 * @author Steve Goetze				 */				public class BigIntegerMath extends NumberMath {									protected static BigIntegerMath instance = new BigIntegerMath();										private BigIntegerMath() {}									protected Number absImpl(Number number) {						return toBigInteger(number).abs();					}										protected Number addImpl(Number left, Number right) {						return toBigInteger(left).add(toBigInteger(right));					}					protected Number subtractImpl(Number left, Number right) {						return toBigInteger(left).subtract(toBigInteger(right));					}									protected Number multiplyImpl(Number left, Number right) {						return toBigInteger(left).multiply(toBigInteger(right));					}									protected Number divideImpl(Number left, Number right) {						return BigDecimalMath.instance.divideImpl(left, right);					}										protected int compareToImpl(Number left, Number right) {						return toBigInteger(left).compareTo(toBigInteger(right));					}								    protected Number intdivImpl(Number left, Number right) {				        return toBigInteger(left).divide(toBigInteger(right));				    }				    				    protected Number modImpl(Number left, Number right) {				        return toBigInteger(left).mod(toBigInteger(right));				    }				    				    protected Number negateImpl(Number left) {				        return toBigInteger(left).negate();				    }								    protected Number bitNegateImpl(Number left) {				        return toBigInteger(left).not();				    }								    protected Number orImpl(Number left, Number right) {				        return toBigInteger(left).or(toBigInteger(right));				    }								    protected Number andImpl(Number left, Number right) {				        return toBigInteger(left).and(toBigInteger(right));				    }				    				    protected Number xorImpl(Number left, Number right) {				        return toBigInteger(left).xor(toBigInteger(right));				    }				}