IO包中的其他类

 1 public static void main(String[] args) throws IOException {
 2 
 3         
 4         /*
 5          * 需求：将1.txt 2.txt 3.txt文件中的数据合并到一个文件中。
 6          */
 7         
 8 //        Vector<FileInputStream> v = new Vector<FileInputStream>();        
 9 //        v.add(new FileInputStream("1.txt"));
10 //        v.add(new FileInputStream("2.txt"));
11 //        v.add(new FileInputStream("3.txt"));
12 //        Enumeration<FileInputStream> en = v.elements();
13         
14         ArrayList<FileInputStream> al = new ArrayList<FileInputStream>();
15         for(int x=1; x<=3; x++){
16             al.add(new FileInputStream(x+".txt"));
17         }
18         
19         Enumeration<FileInputStream> en = Collections.enumeration(al);
20         
21         
22         
23         /*
24         final Iterator<FileInputStream> it = al.iterator();
25         Enumeration<FileInputStream> en = new Enumeration<FileInputStream>(){
26 
27             @Override
28             public boolean hasMoreElements() {
29                 
30                 return it.hasNext();
31             }
32 
33             @Override
34             public FileInputStream nextElement() {
35                 
36                 return it.next();
37             }
38             
39         };*/
40         
41         SequenceInputStream sis = new SequenceInputStream(en);
42         
43         FileOutputStream fos = new FileOutputStream("1234.txt");
44         
45         byte[] buf = new byte[1024];
46         
47         int len = 0;
48         
49         while((len=sis.read(buf))!=-1){
50             fos.write(buf,0,len);
51         }
52         
53         fos.close();
54         sis.close();
55         
56     }