/*

Äàí êëàññ ComplexNumber. Ïåðåîïðåäåëèòå â íåì ìåòîäû equals() è hashCode() òàê, ÷òîáû equals() ñðàâíèâàë ýêçåìïëÿðû ComplexNumber ïî ñîäåðæèìîìó ïîëåé re è im, à hashCode() áûë áû ñîãëàñîâàííûì ñ ðåàëèçàöèåé equals().

Ïðèìåð

ComplexNumber a = new ComplexNumber(1, 1);

ComplexNumber b = new ComplexNumber(1, 1);

// a.equals(b) must return true

// a.hashCode() must be equal to b.hashCode()

*/

public final class ComplexNumber {

private final double re;

private final double im;

public ComplexNumber(double re, double im) {

this.re = re;

this.im = im;

}

public double getRe() {

return re;

}

public double getIm() {

return im;

}

@Override

public boolean equals(Object obj) {

if (obj == null) {

return false;

}

if (getClass() != obj.getClass()) {

return false;

}

final ComplexNumber other = (ComplexNumber) obj;

if ((this.getRe() != other.getRe()) || (this.getIm() != other.getIm())) {

return false;

}

return true;

}

@Override

public int hashCode() {

long real = Double.doubleToLongBits(this.getRe()); // harmonize NaN bit patterns

long imag = Double.doubleToLongBits(this.getIm());

if (real == 1L << 63) real = 0; // convert -0.0 to +0.0

if (imag == 1L << 63) imag = 0;

long h = real ^ imag;

return (int)h ^ (int)(h >>> 32);

}

}