[英]How can I use a method of the defined type of the generic class?
public class Team<AbstractMember> {
public int getPoints() {
int points = 0;
for (AbstractMember member : memberList) {
points += member.**getPoints()**;
}
return points;
}
}
我想遍歷成員的要點並返回它們,但是事實是AbstractMember是泛型類的類型,因此禁用了member.getPoints()
方法。 Eclipse表示The method getPoints() is undefined for the type AbstractMember
。
public abstract class AbstractMember{
private String name;
private int points;
public int getPoints() {
return points;
}
}
如何使用泛型類的已定義類型的方法?
更改此聲明
public class Team<AbstractMember>
至
public class Team<T extends AbstractMember>
然后,在代碼中應使用T
來引用類Type。 例如,您將不得不更改for
循環
for (AbstractMember member : memberList)
至
for (T member : memberList) {
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