如何在Java中编写一个等式方法

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

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

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

    public static void main(String[] args) {
        Equation equation1 = new Equation(2, 3);
        Equation equation2 = new Equation(2, 3);
        Equation equation3 = new Equation(4, 5);

        System.out.println(equation1.equals(equation2)); // true
        System.out.println(equation1.equals(equation3)); // false
    }
}