24. 입출력 패키지의 인쇄 흐름, 통합 흐름

package day13;

import java.io.*;

public class PrintWriterDemo {

	public static void main(String[] args) throws IOException {
		BufferedReader br = 
				new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(new FileWriter("E:/in.txt"));
		String line = null;
		while((line=br.readLine())!=null)
		{
			if(line.equals("over"))
				break;
			pw.println(line.toUpperCase());
		}
		pw.close();
		br.close();
	}
}

public class SequenceInputStream extends InputStream
{
	//                  SequenceInputStream（           ，    s1，     s2），
	//      SequenceInputStream      
	public SequenceInputStream(InputStream s1,
                           InputStream s2){}

	//               SequenceInputStream，               InputStream     Enumeration    。
	//                ，      SequenceInputStream      。
	//              ，         close       。
	public SequenceInputStream(Enumeration<? extends InputStream> e){}
}

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;

/**
 *   ：           
 */
public class SequnceInputStreamDemo {

	public static void main(String[] args) throws IOException {
		// Vector    InputStream  
		Vector<FileInputStream> v = new Vector<FileInputStream>();
		v.add(new FileInputStream("e:/1.mp3"));
		v.add(new FileInputStream("e:/2.mp3"));
		v.add(new FileInputStream("e:/3.mp3"));
		
		//  Enumeration
		Enumeration<FileInputStream> e = v.elements();
		
		SequenceInputStream sis = new SequenceInputStream(e);
		FileOutputStream fos = new FileOutputStream("e:/4.mp3");
		
		byte[] buf = new byte[1024];
		int num = 0;
		while((num=sis.read(buf))!=-1)
		{
			fos.write(buf,0,num);
		}
		fos.close();
		sis.close();
		System.out.println("    ");
	}
}

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;

/**
 *   ：           
 * 
 *   ： ArrayList  Vector   ，     Enumeration     
 */
public class SequnceInputStreamDemo {

	public static void main(String[] args) throws IOException {
		// Vector    InputStream  
		ArrayList<FileInputStream> al = new ArrayList<FileInputStream>();
		al.add(new FileInputStream("e:/1.mp3"));
		al.add(new FileInputStream("e:/2.mp3"));
		al.add(new FileInputStream("e:/3.mp3"));
		
		//  Enumeration
		final Iterator<FileInputStream> it = al.iterator();
		Enumeration<FileInputStream> e = new Enumeration<FileInputStream>(){
			public boolean hasMoreElements()
			{
				return it.hasNext();
			}
			public FileInputStream nextElement()
			{
				return it.next();
			}
		};
		SequenceInputStream sis = new SequenceInputStream(e);
		FileOutputStream fos = new FileOutputStream("e:/4.mp3");
		
		byte[] buf = new byte[1024];
		int num = 0;
		while((num=sis.read(buf))!=-1)
		{
			fos.write(buf,0,num);
		}
		fos.close();
		sis.close();
		System.out.println("    ");
	}
}

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

/**
 *   ：    
 */
public class SequnceInputStreamDemo {

	public static void main(String[] args) throws IOException {
		FileInputStream fis = new FileInputStream("e:/4.mp3");
		FileOutputStream fos;
		
		byte[] buf = new byte[1024*1024*5];
		int num = 0;
		int x = 5;
		while((num=fis.read(buf))!=-1)
		{
			fos = new FileOutputStream("e:/"+(x++)+".mp3");
			fos.write(buf,0,num);
			fos.close();
		}
		fis.close();
		System.out.println("    ");
	}
}