IO流：DataInputStream、DataOutputStream

ゞ浴缸里的玫瑰 2021-09-20 11:18 227阅读 0赞

【一】DataInputStream、DataOutputStream

专门用于操作基本数据类型的流对象。

【二】代码示例

import java.io.*;
    class DataDemo 
    {
    	public static void main(String[] args) throws IOException
    	{
    		//write();
    		//read();
    		//writeUTF();
    		readUTF();
    	}
    
    	public static void read() throws IOException
    	{
    		DataInputStream dis=new DataInputStream(new FileInputStream("data.txt"));
    		System.out.println(dis.readInt());
    		System.out.println(dis.readDouble());
    		System.out.println(dis.readFloat());
    		System.out.println(dis.readBoolean());
    		System.out.println(dis.readChar());
    		System.out.println(dis.readByte());
    		dis.close();
    	}
    
    	public static void write() throws IOException
    	{
    		DataOutputStream dos=new DataOutputStream(new FileOutputStream("data.txt"));
    		dos.writeInt(123);
    		dos.writeDouble(123.23);
    		dos.writeFloat(123.23f);
    		dos.writeBoolean(true);
    		dos.writeChar('5');
    		dos.writeByte(4);
    		dos.close();
    	}
    
    	public static void readUTF() throws IOException
    	{
    		DataInputStream dis=new DataInputStream(new FileInputStream("data2.txt"));
    		System.out.println(dis.readUTF());
    		dis.close();
    	}
    
    	public static void writeUTF() throws IOException
    	{
    		DataOutputStream dos=new DataOutputStream(new FileOutputStream("data2.txt"));
    		dos.writeUTF("我爱学习");
    	}
    }

【三】输出截图

write():

![20190625151626488.png][]

read():

![20190625151814462.png][]

writeUTF():

![20190625151709727.png][]

readUTF():

![20190625151742395.png][]

[20190625151626488.png]: /images/20210811/a176b62e93af4e4182681f360f2a7d97.png
[20190625151814462.png]: /images/20210811/b9b391588ebb465bbfe844195610f46d.png
[20190625151709727.png]: /images/20210811/a81427747af44d3a825a4188fc7a2130.png
[20190625151742395.png]: /images/20210811/3aaec2f611424110a35bb8c906f087af.png