MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

/*
 * Output:
 The 0 matching items in the directory, , are:
    
 */

import java.io.File;
import java.io.FilenameFilter;
import java.util.Date;

public class MainClass {
    public static void main(String[] args) {
        File myDir = new File("C:/");
        // Define a filter for java source files beginning with F
        FilenameFilter select = new FileListFilter("F", "java");

        File[] contents = myDir.listFiles(select);

        if (contents != null) {
            System.out.println(
                    "\nThe " + contents.length + " matching items in the directory, " + myDir.getName() + ", are:");
            for (File file : contents) {
                System.out.println(file + " is a " + (file.isDirectory() ? "directory" : "file")
                        + " last modified on\n" + new Date(file.lastModified()));
            }
        } else {
            System.out.println(myDir.getName() + " is not a directory");
        }
        return;
    }
}

class FileListFilter implements FilenameFilter {
    private String name;

    private String extension;

    public FileListFilter(String name, String extension) {
        this.name = name;
        this.extension = extension;
    }

    public boolean accept(File directory, String filename) {
        boolean fileOK = true;

        if (name != null) {
            fileOK &= filename.startsWith(name);
        }

        if (extension != null) {
            fileOK &= filename.endsWith('.' + extension);
        }
        return fileOK;
    }
}