我念叨covariant return types in Java.使用協變返回類型時,我寫了下面的代碼: 一個父類: package other;
public class Super implements Cloneable {
@Override
public Super clone() throws CloneNotSupportedException {
我有一個非常簡單的類: package MyDev;
public class Point3D {
public Point3D(){x = 0; y = 0;z = 0;}
public float x, y, z;
public Point3D(float X, float Y, float Z)
{
x = X; y = Y; z
我在Windows上使用10斯卡拉2.11.6(Java的熱點(TM)64位服務器VM,爪哇1.7.0_79) 我沒有在REPL 以下 scala> class Book (val title:String)
defined class Book
scala> :javap
:javap [-lcsvp] [path1 path2 ...]
scala> :javap -c Book
F