floatingpointmath.java

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;

/**
 * FloatingPoint (Double and Float) NumberMath operations
 * 
 * @author Steve Goetze
 */
public class FloatingPointMath extends NumberMath {

	protected static FloatingPointMath instance = new FloatingPointMath();
	
	private FloatingPointMath() {}
				
	protected Number absImpl(Number number) {
		return new Double(Math.abs(number.doubleValue()));
	}
	
	protected Number addImpl(Number left, Number right) {
		return new Double(left.doubleValue() + right.doubleValue());
	}

	protected Number subtractImpl(Number left, Number right) {
		return new Double(left.doubleValue() - right.doubleValue());
	}

	protected Number multiplyImpl(Number left, Number right) {
		return new Double(left.doubleValue() * right.doubleValue());
	}

	protected Number divideImpl(Number left, Number right) {
		return new Double(left.doubleValue() / right.doubleValue());
	}
	protected int compareToImpl(Number left, Number right) {
		return Double.compare(left.doubleValue(), right.doubleValue());
	}
    
    protected Number modImpl(Number left, Number right) {
        return new Double(left.doubleValue() % right.doubleValue());
    }
    
    protected Number negateImpl(Number left) {
        return new Double(-left.doubleValue());
    }
}