datainputoutputdemo.java

java经典10例子

import java.io.*;

class DataInputOutputDemo{
	public static void main(String args[]) throws  IOException  {
		FileOutputStream fos=new FileOutputStream("a.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("a.txt"));
		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();
		}
	}
}