Java的IO流-数据流

DateOutputStream

数据输入 

package com.itheima.println;
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
 
public class Test3 {
    public static void main(String[] args) {
 
        try(
                //1、创建一个数据输出流包装低级的字节输出流
                DataOutputStream dos =
                        new DataOutputStream(new FileOutputStream("IO/src/itheima.txt"));
                ) {
            dos.write(97);
            dos.writeDouble(97.5);
            dos.writeBoolean(true);
            dos.writeUTF("我是好人");
 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

 

 数据读取

package com.itheima.println;
 
import java.io.*;
 
public class Test5 {
    public static void main(String[] args) {
        try (
                DataInputStream dis =
                        new DataInputStream(new FileInputStream("IO/src/itheima10.txt"));
                ){
            int i = dis.readInt();
            System.out.println(i);
 
            double d = dis.readDouble();
            System.out.println(d);
 
            boolean b = dis.readBoolean();
            System.out.println(b);
 
            String s = dis.readUTF();
            System.out.println(s);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}