23(java/io/data_io)

Posted 2020-09-05 ACM_ICPCER

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