48 lines
947 B
Java
48 lines
947 B
Java
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import lombok.*;
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/** Définir une position. */
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@Data @Value
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public class Position {
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public int x;
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public int y;
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// public Position(int x, int y) {
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// this.x = x;
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// this.y = y;
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// // <(NO_TRACE)>// <(/NO_TRACE)>System.out.println("...appel à Position(" + x + "," + y + ")" + " --> " + this);
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// System.out.println("...appel à Position(" + x + "," + y + ")" + " --> " + this);
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// }
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@Override
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public String toString() {
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return super.toString() + "(" + x + "," + y + ")";
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}
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@Override
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public boolean equals(Object obj) {
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Position other = (Position) obj;
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return other.x == this.x && other.y == this.y;
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}
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@Override
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public int hashCode() {
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// bijection de Z dans N
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int n, m;
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if (this.x >= 0) {
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n = 2 * this.x;
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} else {
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n = -2 * this.x - 1;
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}
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if (this.y >= 0) {
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m = 2 * this.y;
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} else {
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m = -2 * this.y - 1;
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}
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// bijection de N² dans N
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int h = (n+m)*(n+m+1)/2+m;
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return h;
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}
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}
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