嗨,我是RxJava的初学者,并且学习了我在下面做过的事情,
ArrayListObserver.java
import rx.functions.Action1;
public class ArrayListObserver implements Action1<Object>{
public void call(Object element) {
System.out.println(element);
}
}
ArrayListWithObservableDemo.java
import java.util.Arrays;
import java.util.List;
import rx.Observable;
import rx.functions.Action1;
public class ArrayListWithObservableDemo {
List<String> list;
Observable<String> observableList;
public void createList(){
list = Arrays.asList("One", "Two", "Three", "Four", "Five");
}
public void createObservableList(){
observableList = Observable.from(list);
}
public void addObserver(Action1<Object> action1){
observableList.subscribe(action1);
}
public void addtoList(String string){
list.add(string);
}
}
TestApp.java
public class TestApp {
public static void main(String[] args) throws InterruptedException {
ArrayListWithObservableDemo demo = new ArrayListWithObservableDemo();
demo.createList();
demo.createObservableList();
demo.addObserver(new ArrayListObserver());
Thread.sleep(5000);
demo.addtoList("Six");
Thread.sleep(3000);
}
}
现在在运行主要版本时,我遇到以下错误: list.add(string);
java.lang.UnsupportedOperationException
at java.util.AbstractList.add(Unknown Source)
at java.util.AbstractList.add(Unknown Source)
at org.demo.app.ArrayListWithObservableDemo.addtoList(ArrayListWithObservableDemo.java:27)
at org.demo.app.TestApp.main(TestApp.java:11)
是否可以使用新元素添加可观察列表,或者我缺少一些反应性编程的基本概念,如果是这样,请建议我一些好的链接/示例来理解java中反应性思维的概念
由于