散列算法与散列码

一、引入

/**
 * Description:新建一个类作为map的key
 */
public class Groundhog {
    protected int number;

    public Groundhog() {
    }
    
    public Groundhog(int number) {
        this.number = number;
    }

    @Override
    public String toString() {
        return "Groundhog{" + "number=" + number + '}';
    }
}

Groundhog