Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.zip.ZipFile;

/**
 * This program will search all jar and zip files in the current directory for a
 * given class file.
 * 
 * @author Dave Glasser
 */
public class Main {

    /**
     * Returns true if the jar or zip file at jarFilePath contains (with the
     * internal path) the file named by classFilePath.
     */
    public static boolean searchJarFile(String jarFilePath, String classFilePath) {
        return searchJarFile(new File(jarFilePath), classFilePath);
    }

    public static boolean searchJarFile(File file, String classFilePath) {

        try {
            if (!file.exists())
                return false;

            ZipFile jarFile = new ZipFile(file);
            if (jarFile.getEntry(classFilePath) != null) {
                jarFile.close();
                return true;
            } else {
                jarFile.close();
                return false;
            }
        } catch (IOException ex) {
            System.out.println(ex.toString());
            return false;
        }
    }

    static class ArchiveFilter implements FileFilter {

        public boolean accept(File pathName) {
            String upcase = pathName.getName().toUpperCase();
            if (upcase.endsWith(".ZIP") || upcase.endsWith(".JAR"))
                return true;
            return false;
        }
    }

    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println(
                    "usage: java ClassFinder <class name>\n\n" + "example: java ClassFinder java.lang.String\n");
            System.exit(0);
        }

        File cwd = new File(".");
        File[] archives = cwd.listFiles(new ArchiveFilter());

        String classFileName = args[0].replace('.', '/');
        if (classFileName.endsWith(".class") == false) {
            classFileName += ".class";
        }

        System.out.println("Searching for " + classFileName + " ...");
        for (int j = 0; j < archives.length; j++) {
            // System.out.println("Searching " + archives[j].getName());
            if (searchJarFile(archives[j], classFileName)) {
                System.out.println("FOUND IN " + archives[j].getName());
            }
        }
    }
}