ipworkszip.Zipのいくつかのバグは慎重に使います

import ipworkszip.Zip;

public class TestIpWork
{
    public void test1(String filePaht, String workDirPaht) throws Exception
    {
        Zip zip = new Zip();
        zip.setArchiveFile(filePaht);
        zip.setExtractToPath(workDirPaht);
        zip.extractAll();
    }

    public static void main(String[] args) throws Exception
    {
        for (int i = 0; i < 20; i++)
        {
            final int j = i;
            new Thread(new Runnable()
            {
                @Override
                public void run()
                {
                    try
                    {
                        TestIpWork test = new TestIpWork();
                        test.test1("a" + j + ".zip", "test/" + j + "/");
                        Thread.sleep(100);
                    }
                    catch (Exception e)
                    {
                        e.printStackTrace();
                    }
                }
            }).start();
        }

    }
}