sequence.java

java应用开发详解

import java.util.*;
import java.io.*;

public class Sequence{
    public static void main(String[] args) throws IOException 
    {
        //声明两个文件读入流
	FileInputStream in1 =null ,in2=null;
	//声明一个序列流
	SequenceInputStream s = null;
        FileOutputStream out =null;
                
        try
	{
		//构造两个被读入的文件
		File inputFile1 = new File("1.txt");
    		File inputFile2 = new File("2.txt");
    		//构造一个输出文件
    		File outputFile = new File("12.txt");

        	in1 = new FileInputStream(inputFile1);
        	in2 = new FileInputStream(inputFile2);
        	
        	//将两输入流合为一个输入流
        	s= new SequenceInputStream(in1,in2);
		out = new FileOutputStream(outputFile);
		
        	int c;

        	while ((c = s.read()) != -1)
           		out.write(c);

        	in1.close();
        	in2.close();
        	s.close();
        	out.close();
        	
        	System.out.println("ok...");
        }
        catch(IOException e)
        {
        	e.printStackTrace();
        }
        finally
        {
		if(in1!=null) try{in1.close();}catch(IOException e){}
		if(in2!=null) try{in2.close();}catch(IOException e){}
        	if(s!=null) try{s.close();}catch(IOException e){}
        	if(out!=null) try{out.close();}catch(IOException e){}
        }
    }
}