IO流（序列流）

package com.day17.IO;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;

public class OtherIO {

    public static void main(String[] args) throws IOException {
        fun();
        
        FileInputStream fis1=new FileInputStream("a.txt");
        FileInputStream fis2=new FileInputStream("b.txt");
        SequenceInputStream sis=new SequenceInputStream(fis1,fis2);
        FileOutputStream fos=new FileOutputStream("c.txt");
        int b;
        while((b=sis.read())!=-1) {
            fos.write(b);
        }
        sis.close();
        fos.close();
    }

    private static void fun() throws FileNotFoundException, IOException {
        FileInputStream fis1=new FileInputStream("a.txt");
        //FileInputStream fis2=new FileInputStream("b.txt");
        FileOutputStream fos=new FileOutputStream("c.txt");
        int b1;
        while((b1=fis1.read())!=-1) {
            fos.write(b1);
        }
        fis1.close();
        
        FileInputStream fis2=new FileInputStream("b.txt");
        int b2;
        while((b2=fis2.read())!=-1) {
            fos.write(b2);
        }
        fis2.close();
        fos.close();
    }

}