Java类，抽象类和接口方法的优先级
示例
类中的实现（包括抽象声明）优先于所有接口默认值。
抽象类方法优先于接口默认方法。
public interface Swim {
default void backStroke() {
System.out.println("Swim.backStroke");
}
}
public abstract class AbstractSwimmer implements Swim {
public void backStroke() {
System.out.println("AbstractSwimmer.backStroke");
}
}
public class FooSwimmer extends AbstractSwimmer {
}以下声明
new FooSwimmer().backStroke();
会产生
AbstractSwimmer.backStroke
类方法优先于接口默认方法
public interface Swim {
default void backStroke() {
System.out.println("Swim.backStroke");
}
}
public abstract class AbstractSwimmer implements Swim {
}
public class FooSwimmer extends AbstractSwimmer {
public void backStroke() {
System.out.println("FooSwimmer.backStroke");
}
}以下声明
new FooSwimmer().backStroke();
会产生
FooSwimmer.backStroke