黑马程序员-学习日志-操作基本数据类型的数据流

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import java.io.*;
class DataStreamDemo
{
public static void main(String[] args) throws IOException
{
//writeData();
//readData();
//writeUTFDemo();
readUTFDemo();
}
public static void readUTFDemo() throws IOException
{
DataInputStream dis = new DataInputStream(new FileInputStream("utfdate.txt"));

String s = dis.readUTF();

System.out.println(s);
dis.close();
}

public static void writeUTFDemo() throws IOException
{
DataOutputStream dos = new DataOutputStream(new FileOutputStream("utfdate.txt"));

dos.writeUTF("你好");

dos.close();
}

public static void readData() throws IOException
{
DataInputStream dis = new DataInputStream(new FileInputStream("data.txt"));

int num = dis.readInt();
boolean b = dis.readBoolean();
double d = dis.readDouble();

System.out.println("num="+num);
System.out.println("b="+b);
System.out.println("d="+d);

dis.close();
}

public static void writeData() throws IOException
{
DataOutputStream dos = new DataOutputStream(new FileOutputStream("data.txt"));

dos.writeInt(234);
dos.writeBoolean(true);
dos.writeDouble(9887.543);

dos.close();
}
}

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