Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.zip.ZipFile;

public class Main {

    /**
     * Determine whether a file is a ZIP File.
     */
    public static boolean isZipFile(File file) throws IOException {
        if (file.isDirectory()) {
            return false;
        }
        if (!file.canRead()) {
            throw new IOException("Cannot read file " + file.getAbsolutePath());
        }
        if (file.length() < 4) {
            return false;
        }
        DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
        int test = in.readInt();
        in.close();
        return test == 0x504b0304;
    }
}