package test_ppt;import java.io.*;public class test_ppt{ public static void main(String args[]) throws IOException { FileOutputStream fos = new FileOutputStream("a.txt"); DataOutputStream dos = new DataOutputStream (fos); try {//ff 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(); } FileInputStream fis = new FileInputStream("a.txt"); DataInputStream dis = new DataInputStream(fis); try { System.out.println("\t "+dis.readBoolean()); System.out.println("\t "+dis.readByte()); System.out.println("\t "+dis.readChar()); System.out.println("\t "+dis.readDouble()); System.out.println("\t "+dis.readFloat()); System.out.println("\t "+dis.readInt()); System.out.println("\t "+dis.readLong()); System.out.println("\t "+dis.readShort()); } finally { dis.close(); } }//main()}//class DataStream
来源: http://www.bubuko.com/infodetail-1987641.html