[JAVA] 6. Java中的重写override

对于java中对象的比较，经常会需要对类内的equals和hashCode函数进行重写，下面一一个简单的点类为例，IDEA提供了快速重写的方法，通过Generate->equals&hashcode就可以快速重写:

import java.util.Objects;

public class Point {
    private int x;
    private int y;

    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Point point = (Point) o;
        return x == point.x &&
                y == point.y;
    }

    @Override
    public int hashCode() {
        return Objects.hash(x, y);
    }
}