相关疑难解决方法(0)

以下方法中的3个点是什么意思？

public void myMethod(String... strings){
    // method body
}

我在Android文档中阅读有关AsyncTask的内容.

private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
     protected Long doInBackground(URL... urls) {
         int count = urls.length;
         long totalSize = 0;
         for (int i = 0; i < count; i++) {
             totalSize += Downloader.downloadFile(urls[i]);
             publishProgress((int) ((i / (float) count) * 100));
             // Escape early if cancel() is called
             if (isCancelled()) break;
         }
         return totalSize;
     }

     protected void onProgressUpdate(Integer... progress) {
         setProgressPercent(progress[0]);
     }

     protected void onPostExecute(Long result) {
         showDialog("Downloaded " + result + " bytes");
     }
 }

问题是doInBackground(URL... urls) …

当我用Java编写构造函数时,如下所示:

import java.io.IOException;
import java.io.OutputStream;

public class MultiOutputStream extends OutputStream{

    OutputStream[] oStream;

    public MultiOutputStream(OutputStream oStream) { 
        this.oStream = oStream;
        // TODO Auto-generated constructor stub
    }

    @Override
    public void write(int arg0) throws IOException {
        // TODO Auto-generated method stub

    }
}

Eclipse现在说:类型不匹配:无法从OutputStream转换为OutputStream [].所以Eclipse修正了我的构造函数,如下所示:

import java.io.IOException;
import java.io.OutputStream;

public class MultiOutputStream extends OutputStream{

    OutputStream[] oStream;

    public MultiOutputStream(OutputStream... oStream) {
        this.oStream = oStream;
        // TODO Auto-generated constructor stub
    }

    @Override
    public void write(int arg0) throws IOException {
        // TODO Auto-generated method …