39 lines
893 B
Java
39 lines
893 B
Java
// files/DirList.java
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// ©2016 MindView LLC: see Copyright.txt
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// Display a directory listing using regular expressions.
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// {Args: "D.*\.java"}
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import java.util.regex.*;
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import java.io.*;
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import java.util.*;
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public class DirList {
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public static void main(String[] args) {
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File path = new File(".");
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String[] list;
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if(args.length == 0)
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list = path.list();
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else
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list = path.list(new DirFilter(args[0]));
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Arrays.sort(list, String.CASE_INSENSITIVE_ORDER);
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for(String dirItem : list)
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System.out.println(dirItem);
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}
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}
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class DirFilter implements FilenameFilter {
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private Pattern pattern;
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public DirFilter(String regex) {
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pattern = Pattern.compile(regex);
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}
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@Override
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public boolean accept(File dir, String name) {
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return pattern.matcher(name).matches();
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}
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}
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/* Output:
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DirectoryDemo.java
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DirList.java
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DirList2.java
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DirList3.java
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*/
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