打印流：

這個(gè)流的主要作用就是打印文字期吓，它的目標(biāo)主要是文件早歇，屏幕，網(wǎng)絡(luò)讨勤。打印流屬于輸出流箭跳。它分為PrintStream，PrintWriter
PrintStream中的Print方法就是鍵盤錄入潭千，PrintStream中的Writer方法就是打印的是二進(jìn)制的后四位衅码。

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;

public class IoDemo{
    public static void main(String[] args) throws IOException {
        PrintStream ps=new PrintStream("e:/lishuai.txt");
        ps.print(78);
        ps.print("lishuai");
        ps.println();
        ps.write(85);
    }
}

PrintWriter字符輸出流的打印流，當(dāng)在創(chuàng)建對(duì)象的時(shí)候,根據(jù)api中介紹的構(gòu)造方法能夠開啟了自動(dòng)刷新的功能脊岳，當(dāng)我們使用PrintWriter中的printf、println、format方法寫出數(shù)據(jù)的時(shí)候割捅，就會(huì)自動(dòng)刷新奶躯。

import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;


public class IoDemo{
    public static void main(String[] args) throws IOException {
    PrintWriter pw=new PrintWriter(new FileWriter("e:/lishuai.txt",true));
    pw.println("lishualiu");
    }
}
###管道流：
這個(gè)流的特點(diǎn)是可以把輸入和輸出流直接對(duì)接起來，我們不用在兩個(gè)之間定義任何的變量或者數(shù)組亿驾。PipedInputStream和PipedOutputStream  字節(jié)輸入和輸出的管道流PipedReader和PipedWriter字符輸入和輸出的管道流管道輸入流它是負(fù)責(zé)從管道讀取數(shù)據(jù)嘹黔，管道輸出流它負(fù)責(zé)把數(shù)據(jù)寫到管道中。
```java
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;

public class IoDemo {
    public static void main(String[] args) throws IOException {
        PipedInputStream pi = new PipedInputStream();
        PipedOutputStream po = new PipedOutputStream();
        pi.connect(po);
        Input in=new Input(pi);
        Output ou=new Output(po);
        Thread t1=new Thread(in);
        Thread t2=new Thread(ou);
        t1.start();
        t2.start();
    }
}

class Input implements Runnable {
    PipedInputStream pi;

    Input(PipedInputStream pi) {
        this.pi = pi;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        int len = 0;
        byte[] b = new byte[1024];
        try {
            while ((len = pi.read(b)) != -1) {
                System.out.println(new String(b, 0, len));
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                pi.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

}

class Output implements Runnable {
    PipedOutputStream po;

    Output(PipedOutputStream po) {
        this.po = po;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        try {
            po.write("李帥的輸出".getBytes());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                po.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

}