java中输写equals和hashCode方法

public class Test{
    private String name;
    private int salary;
    private Date hireDay;

    public boolean equals(Object otherObject){
        if(this == otherObject)     //是否引用同一个对象
            return true;
        if(otherObject == null)     
            return false;
        if(getClass() != otherObject.getClass())        //比较是否属于同一个类
            return false;
        //所有子类都有统一的语义，就用instanceof检测:
//        if(!(otherObject instanceof ClassName)) return false;
        Test other = (Test) otherObject;
        return Objects.equals(name,other.name) && salary == other.salary && Objects.equals(hireDay,other.hireDay);
        
        //如果在子类中重新定义equals，就要在其中包含调用super.equals(other)
    }

    public int hashCode(){
        return Objects.hash(name,salary,hireDay);
    }


}