Cleaned up even more GUIs

Added possibility to create Thumbnails and show them in the Replay Manager

src/main/java/eu/crushedpixel/replaymod/utils/ZipFileUtils.java

@@ -0,0 +1,59 @@
+package eu.crushedpixel.replaymod.utils;
+
+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.ZipInputStream;
+import java.util.zip.ZipOutputStream;
+
+public class ZipFileUtils {
+
+	public static void deleteZipEntry(File zipFile,
+			String[] files) throws IOException {
+		// get a temp file
+		File tempFile = File.createTempFile(zipFile.getName(), null);
+		// delete it, otherwise you cannot rename your existing zip to it.
+		tempFile.delete();
+		tempFile.deleteOnExit();
+		boolean renameOk=zipFile.renameTo(tempFile);
+		if (!renameOk)
+		{
+			throw new RuntimeException("could not rename the file "+zipFile.getAbsolutePath()+" to "+tempFile.getAbsolutePath());
+		}
+		byte[] buf = new byte[1024];
+
+		ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
+		ZipOutputStream zout = new ZipOutputStream(new FileOutputStream(zipFile));
+
+		ZipEntry entry = zin.getNextEntry();
+		while (entry != null) {
+			String name = entry.getName();
+			boolean toBeDeleted = false;
+			for (String f : files) {
+				if (f.equals(name)) {
+					toBeDeleted = true;
+					break;
+				}
+			}
+			if (!toBeDeleted) {
+				// Add ZIP entry to output stream.
+				zout.putNextEntry(new ZipEntry(name));
+				// Transfer bytes from the ZIP file to the output file
+				int len;
+				while ((len = zin.read(buf)) > 0) {
+					zout.write(buf, 0, len);
+				}
+			}
+			entry = zin.getNextEntry();
+		}
+		// Close the streams        
+		zin.close();
+		// Compress the files
+		// Complete the ZIP file
+		zout.close();
+		tempFile.delete();
+	}
+	
+}