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  1. final class ComplexNumber {
  2. 	private final double re;
  3. 	private final double im;
  4.  
  5. 	public ComplexNumber(double re, double im) {
  6. 	    this.re = re;
  7. 	    this.im = im;
  8. 	}
  9.  
  10. 	public double getRe() {
  11. 	    return re;
  12. 	}
  13.  
  14. 	@Override
  15. 	public boolean equals(Object o) {
  16. 	    if (this == o) return true; //(this == o) - ругается
  17. 	    if (o == null || getClass() != o.getClass()) return false; //ругается getClass() != o.getClass()
  18.  
  19.  
  20. 	    ComplexNumber that = (ComplexNumber) o; //(ComplexNumber) o - ругается
  21.  
  22. 	    if (Double.compare(that.re, re) != 0) return false;
  23. 	    if (Double.compare(that.im, im) != 0) return false;
  24.  
  25. 	    return true;
  26. 	}
  27.  
  28. 	@Override
  29. 	public int hashCode() {
  30. 	    int result;
  31. 	    long temp;
  32. 	    temp = Double.doubleToLongBits(re);
  33. 	    result = (int) (temp ^ (temp >>> 32));
  34. 	    temp = Double.doubleToLongBits(im);
  35. 	    result = 31 * result + (int) (temp ^ (temp >>> 32));
  36. 	    return result;
  37. 	}
  38.  
  39. 	public double getIm() {
  40. 	    return im;
  41.  
  42.  
  43.  
  44. 	}
  45. 	public static void main(String[] args) {
  46.  
  47. 	    ComplexNumber a = new ComplexNumber(1, 1);
  48. 	    ComplexNumber b = new ComplexNumber(1, 1);
  49. 	    System.out.println(a.equals(b));
  50. 	    System.out.println(a.hashCode() + " " + a.hashCode());
  51. 	}
  52. }
Success #stdin #stdout 0.1s 320576KB
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-33554432 -33554432
https://ideone.com/LdgQ4V
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

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