You can use the File class to batch Delete duplicate files in a File, for example, haokan (22.16.mp4, haokan (32.16.mp4,
1 public class HH {2 public static void main (String [] args) {3 String s = "he is a boy"; 4 int result = s. indexOf ("boy ");
I am using the indexOf () method;
5 if (result> = 0) {6 System. out. println ("boy is part of he is a boy"); 7} else {8 System. out. println ("boy is not part of he is a boy"); 9} 10} 11}
In fact, this is an online method. I was wondering if I could use character matching, but matches () is not very useful yet, so I came up with a good method;
Based on the above Code!
File file = new File("d:/");
Defines the file path;
1 File file = new File ("E:/thunder download/videos"); 2 3 File [] file2 = file. listFiles (new FileFilter () {4 // here, an array of files 5 @ Override 6 public boolean accept (File path) {7 int result = path. getName (). indexOf ("(5 )");
// Here, IndexOf () gets the position (5) and returns its position. If there is a value greater than 0
8 int result2 = path. getName (). indexOf ("(6)"); 9 int result3 = path. getName (). indexOf ("(7)"); 10 if (result> 0 | result2> 0 | result3> 0) {11 return true; 12} 13 return false; 14}
15 });
for (File file3 : file2) { file3.delete(); //System.out.println(file3.getName()); }
This is my method, which is very troublesome.
Later, I asked my mentor about his method;
1 File [] files = folder. listFiles (new FileFilter () {2 3 @ Override 4 public boolean accept (File path) {5 if (path. getName (). matches (". * \ ([1-9] \). *")){
\ (= (Here the escape character is used
6 return true; 7} 8 return false; 9} 10 });
This is the String. matches () matching method;
This is a small program and I hope to share it with you.
Summary
The above explains the simple use of file matching, although it is only an auxiliary function,
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