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我不知道這個錯誤以及如何解決它。我的所有子類都出現這個錯誤。包括錯誤消息和需要重寫的抽象方法。增加了課堂和課堂內部的內容。Java中的抽象類錯誤與可比較<T>
錯誤:
MyMath3 is not abstract and does not overide abstract method compareTo(Homework3) in java.lang.Compareable
代碼:
public abstract class Homework3 implements Comparable<Homework3>
public class MyMath3 extends Homework3
private int page;
private String typeHomework;
/**
* Constructor for objects of class MyMath
*/
public MyMath3(int p)
{
}
public void createAssignment(int p)
{
typeHomework="Math";
page=p;
}
public String getHomework()
{
return typeHomework;
}
public int getPage()
{
return page;
}
public String toString()
{
return typeHomework+"--- The number of pages needed to read:"+page;
}
}
public int compareTo(Homework3 obj,Homework3 obj2)
{
int compareResult= obj.compareTo(obj2);
return compareResult;
}
鼠標懸停在Eclipse中的錯誤消息,然後單擊「實現所有抽象方法」選項 – donfuxx
在未來,請用複製和粘貼,而不是重新輸入和手動引入源代碼中不存在的錯誤。 – ruakh