黑马程序员：操作基本数据类型的流对象DataStream

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DataInputStream DateOutputStream

可以用于操作基本数据类型的数据的流对象。

import java.io.*;

//演示代码没处理异常
class DataStreamDemo
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
public static void readUTFDemo()
{
DataInputStream dis = new DataInputStream(new FileInputStream("utfdate.txt"));
String s = dis.readUTF();
System.out.println(s);
dis.close();
}

public static void writeUTFDemo()
{
DataOutputStream dos = new DataOutputStream(new FileOutputStream("utfdate.txt"));
dos.writeUTF("你好");
dos.close();
}
public static void writeData()
{
DataOutputStream dos = new DataOutputStream(new FileOutputStream("data.txt"));
dos.witeInt(234);
dos.writeBoolean(true);
dos.writeDouble(988.34);
dos.close();
}

public static void readData()
{
DataInputStream dis = new DataInputStream(new FileInputStream("data.txt");
int num = dis.readInt();
boolean b = dis.readBoolean();
double d = dis.readDouble();

System.out.println(num);
System.out.println(b);
System.out.println(d);

dis.close();
}
}

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