datastream.java~8~

来自「java2参考大全上的例子的源码和自己的理解.」· JAVA~8~ 代码 · 共 61 行

package datainput_output;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.io.*;

class DataStream {
  public static void main(String args[]) throws IOException {
    FileOutputStream fos = new FileOutputStream("DataStream.txt");
    DataOutputStream dos = new DataOutputStream(fos);
    try {
      dos.writeBoolean(true);
      dos.writeByte( (byte) 123);
      dos.writeChar('J');
      dos.writeDouble(3.141592654);
      dos.writeFloat(2.7182f);
      dos.writeInt(1234567890);
      dos.writeLong(998877665544332211L);
      dos.writeShort( (short) 11223);
    }
    finally {
      dos.close();
    }

    DataInputStream dis = new DataInputStream(
        new FileInputStream("DataStream.txt"));
    String currentLine;
    int lineCount=0;
    int charCount=0;
    while((currentLine=dis.readLine())!=null)
    {  ++lineCount;
       charCount+=currentLine.length();
    }
    System.out.println("\t " + lineCount);
   //System.out.println("\t " + (charCount/(float)lineCount));

     DataInputStream d = new DataInputStream(
        new FileInputStream("DataStream.txt"));
      try {
      System.out.println("\t " + d.readBoolean());
      System.out.println("\t " + d.readByte());
      System.out.println("\t " + d.readChar());
      System.out.println("\t " + d.readDouble());
      System.out.println("\t " + d.readFloat());
      System.out.println("\t " + d.readInt());
      System.out.println("\t " + d.readLong());
      System.out.println("\t " + d.readShort());
    }
    finally {
      dis.close();
    }
  }

}