datainput_output.java

我自己学习JAVA过程中用键盘敲的代码

import java.io.*;
public class datainput_output
{ 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();}
}
}