在此例中，new File(".")表示本項目路徑，如要把所有以.py結尾的文件過濾出來，參數傳遞為“.*\.py”
package io;
//: io/DirList.java
// Display a directory listing using regular expressions.
// {Args: "D.*\.java"}
import java.util.regex.*;
import java.io.*;
import java.util.*;
public class DirList {
public static void main(String[] args) {
File path = new File(".");
String[] list;
if(args.length == 0)
list = path.list();
else
list = path.list(new DirFilter(args[0]));
Arrays.sort(list, String.CASE_INSENSITIVE_ORDER);
for(String dirItem : list)
System.out.println(dirItem);
}
}
class DirFilter implements FilenameFilter {
private Pattern pattern;
public DirFilter(String regex) {
pattern = Pattern.compile(regex);
}
public boolean accept(File dir, String name) {
return pattern.matcher(name).matches();
}
} /* Output:
DirectoryDemo.java
DirList.java
DirList2.java
DirList3.java
*///:~
posted on 2007-11-13 11:34
fullfocus 閱讀(1134)
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