java - Java 中的数据流

Question

我正在使用java中的Data Stream类来执行读写操作。我的问题是我没有关闭两个流，甚至没有刷新数据然后它如何正常工作。

我的意思是说，如果数据没有从 DataOutputStream 中清除，那么它如何成功地从 DataiInputStream 读取数据。

public class DataStream {
    public static void main(String[] args) {
        DataOutputStream dataOutputStream = null;
        DataInputStream dataInputStream = null;
        try {
            dataOutputStream = new DataOutputStream(new FileOutputStream("E:/output.in"));
            dataOutputStream.writeInt(12345);
            dataOutputStream.writeFloat(123.45F);
            dataOutputStream.writeLong(12345);

            dataInputStream = new DataInputStream(new FileInputStream("E:/output.in"));

            int intValue = dataInputStream.readInt();
            float floatValue = dataInputStream.readFloat();
            long longValue = dataInputStream.readLong();

            System.out.println("int     = " + intValue);
            System.out.println("float = " + floatValue);
            System.out.println("long    = " + longValue);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Answer 1

My question is I am not closing both the streams and not even flushing the data then how it is working properly.

因为 DataOutputStream 和 FileOutputStream 都没有缓冲。