操作基本数据类型的数据流对象 - 黑马程序员技术交流社区

package cn.itcast;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class DataDemo
{
public static void main(String[] args) throws IOException
{
readData();
//writeData();
}
public static void readData()throws IOException
{
//创建DataInputStream对象并传入一个写入流
DataInputStream dis = new DataInputStream(new FileInputStream("E:\\data.txt"));
int num = dis.readInt();
boolean b = dis.readBoolean();
double d = dis.readDouble();
sop("num="+num);
sop("b="+b);
sop("d="+d);
dis.close();
}
public static void writeData()throws IOException
{
DataOutputStream dos = new DataOutputStream(new FileOutputStream("E:\\data.txt"));
dos.write(234);
dos.writeBoolean(true);
dos.writeDouble(100.876);
dos.close();
}
public static void sop(Object obj)
{
System.out.println(obj);
}
}

复制代码