單項選擇題

程序:  
class MyDate{  
private int year;  
private int month;  
private int day;  
public MyDate(
int year,
int month,int day){  
this.year=year;  
this.month=month;  
this.day=day;  }  
//Override Method  }  
為了讓new MyDate(1980,11,9)==(判斷是否相等)new MyDate(1980,11,9) 返 回true,必須在Override Method處覆蓋哪個方法?()

A. hashCode
B. equals
C. toString
D. notify

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