import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipExample {

    public static void main(String[] args) {
        String sourceFile = "example.txt";
        String zipFile = "example.zip";

        try (FileOutputStream fos = new FileOutputStream(zipFile);
             ZipOutputStream zos = new ZipOutputStream(fos)) {
            File fileToZip = new File(sourceFile);
            FileInputStream fis = new FileInputStream(fileToZip);
            ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
            zos.putNextEntry(zipEntry);

            byte[] bytes = new byte[1024];
            int length;
            while ((length = fis.read(bytes)) >= 0) {
                zos.write(bytes, 0, length);
            }
            zos.closeEntry();
            fis.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}