我有一对看起来像这样的课程;
public abstract class Class1 {
//...
public Class1() {
//...
function2();
//...
}
protected abstract void function2();
}
public class Class2 implements Class1 {
private final OnSomethingListener mOnSomethingListener = new OnSomethingListener() {
@Override
onSomething() {
doThatOtherThing();
}
}
protected void function2() {
//uses mOnSomethingListener
//however mOnSomethingListener is null when this function is called from super()
//...
}
public Class2() {
super();
}
}
我假设侦听器为空,因为我正在有效地引用它super()
并且它尚未实例化。但是,我想成功,final
因为,嗯,确实如此。我可以让这个字段(监听器)及时初始化而不把它放在超类中(永远不会使用监听器)吗?