complex.java

Java检查一个复述类 纯属是一个普通的试验

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package testcomplex;

/**
 *
 * @author 池光
 */
public class Complex extends Number implements Comparable{
	private double real = 1.0;
	private double image = 1.0;
	public Complex(){
		this(1.0,1.0);
	}
	public Complex(double real,double image){
		this.real = real;
		this.image = image;
	}
	public double getReal(){
		return real;
	}
	public double getImage(){
		return image;
	}
	public Complex add(Complex aComplex){
	    double r = real + aComplex.getReal();
	    double i = image + aComplex.getImage();
	    return new Complex(r,i);
	}
	public Complex sub(Complex aComplex){
	    double r = real - aComplex.getReal();
	    double i = image - aComplex.getImage();
	    return new Complex(r,i);	
	}
	public Complex multiply(Complex aComplex){
		double r = real * aComplex.getReal() - image * aComplex.getImage();
	    double i = real * aComplex.getImage() - image * aComplex.getReal();
	    return new Complex(r,i);	
	}
	public Complex divide(Complex aComplex){
		double t = Math.pow(aComplex.getReal(),2) + Math.pow(aComplex.getImage(),2);
		double r = (real * aComplex.getReal() + image * aComplex.getImage()) / t;
	    double i = (image * aComplex.getReal() - real * aComplex.getImage()) / t;
	    return new Complex(r,i);
	}
	public String toString(){
		if(real >=0 && image >= 0)
		    return real + "+i" + image;
		else if(real >= 0 && image <= 0)
		    return real + "-i" + Math.abs(image);
		else if(real <= 0 && image >= 0)
		    return "-" + Math.abs(real) + "+i" + image;
		else 
		    return "-" + Math.abs(real) + "-i" + Math.abs(image);
	}
	public int hashCode(){
		return new Double(this.doubleValue()).hashCode();
	}
	public int intValue(){
		return (int)doubleValue();
	}
	public float floatValue(){
		return (float)doubleValue();
	}
	public double doubleValue(){
		return Math.sqrt(Math.pow(real,2) + Math.pow(image,2));
	}
	public long longValue(){
		return (long)doubleValue();
	}
	public int compareTo(Object o){
        double t = Math.sqrt(Math.pow(real,2) + Math.pow(image,2)) - ((Complex)o).doubleValue();
        if(t > 0)
            return 1;
        else if(t < 0)
            return -1;
        else 
            return 0;
	}
}