Java out.write运行多次，但结果文件为空

我正在Windows7上的Netbeans7.3.1上用JavaSE开发

我正在尝试将一组数字（每行一个）写入ASCII文本文件

            FileWriter fstream = new FileWriter(outputFileName, false); //false tells to not append data.
            BufferedWriter out = new BufferedWriter(fstream);
            for (int i=0; i<numBins; ++i){
                String str=Integer.toString(hist[i]);
                str.concat("\n");
                out.write(str);
            }
            br.close();

---

被呼叫6次。hist[i]是小整数。由于某些原因，生成的文件为空且大小为零

关闭BufferedWriter对象

 FileWriter fstream = new FileWriter(outputFileName, false); //false tells to not append data.
            BufferedWriter out = new BufferedWriter(fstream);
            for (int i=0; i<numBins; ++i){
                String str=Integer.toString(hist[i]);
                str.concat("\n");
                out.write(str);
            }
            out.close();

FileWriter fstream=newfilewriter（outputFileName，false）//false指示不要追加数据。
BufferedWriter out=新的BufferedWriter（fstream）；
对于（int i=0；i您需要在BufferedWriter对象上调用close方法以将内容刷新到文件：

   FileWriter fstream = new FileWriter(outputFileName, false); //false tells to not append data.
            BufferedWriter out = new BufferedWriter(fstream);
            for (int i=0; i<numBins; ++i){
                String str=Integer.toString(hist[i]);
                str.concat("\n");
                out.write(str);
            }
           // add this also
           out.close();

FileWriter fstream=newfilewriter（outputFileName，false）；//false告知不要追加数据。
BufferedWriter out=新的BufferedWriter（fstream）；
对于（int i=0；i
   FileWriter fstream = new FileWriter(outputFileName, false); //false tells to not append data.
            BufferedWriter out = new BufferedWriter(fstream);
            for (int i=0; i<numBins; ++i){
                String str=Integer.toString(hist[i]);
                str.concat("\n");
                out.write(str);
            }
           // add this also
           out.close();