Reformat code

src/main/java/ru/redguy/tftpserver/CheckSum.java

@@ -28,7 +28,9 @@ public class CheckSum {
                 sb.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));
             }
 
-		} catch (Exception e){System.out.println("Generate Checksum Failed: "+e.getMessage());}
+        } catch (Exception e) {
+            System.out.println("Generate Checksum Failed: " + e.getMessage());
+        }
 
         return sb.toString();
     }

src/main/java/ru/redguy/tftpserver/ErrorEvent.java

@@ -2,8 +2,12 @@ package ru.redguy.tftpserver;
 
 public interface ErrorEvent {
     public void onPacketReceiveException(Exception exception);
+
     public void onPacketReadException(Exception exception);
+
     public void onPacketWriteException(Exception exception);
+
     public void onClientReadException(Exception exception, TFTPread tftPread);
+
     public void onClientWriteException(Exception exception, TFTPwrite tftPwrite);
 }

src/main/java/ru/redguy/tftpserver/TFTPServer.java

@@ -1,7 +1,10 @@
 package ru.redguy.tftpserver;
 
-import java.net.*;
+import java.io.IOException;
-import java.io.*;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.net.UnknownHostException;
 
 public class TFTPServer {
 
@@ -72,9 +75,7 @@ public class TFTPServer {
                     } catch (TftpException e) {
                         server.errorEvent.onPacketReadException(e);
                     }
-				}
+                } else if (in instanceof TFTPwrite) {
-
-				else if (in instanceof TFTPwrite) {
                     try {
                         TFTPserverWRQ w = new TFTPserverWRQ((TFTPwrite) in, server.errorEvent);
                     } catch (TftpException e) {

src/main/java/ru/redguy/tftpserver/TFTPpacket.java

@@ -1,16 +1,22 @@
 package ru.redguy.tftpserver;
 
-import java.net.*;
+import java.io.FileInputStream;
-import java.io.*;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
 
 class TftpException extends Exception {
     public TftpException() {
         super();
     }
+
     public TftpException(String s) {
         super(s);
     }
 }
+
 //////////////////////////////////////////////////////////////////////////////
 //GENERAL packet: define the packet structure, necessary members and methods// 
 //of TFTP packet. To be extended by other specific packet(read, write, etc) //
@@ -136,7 +142,9 @@ public class TFTPpacket {
 final class TFTPdata extends TFTPpacket {
 
     // Constructors
-	protected TFTPdata() {}
+    protected TFTPdata() {
+    }
+
     public TFTPdata(int blockNumber, FileInputStream in) throws IOException {
         this.message = new byte[maxTftpPakLen];
         // manipulate message
@@ -175,6 +183,7 @@ class TFTPerror extends TFTPpacket {
     // Constructors
     protected TFTPerror() {
     }
+
     //Generate error packet
     public TFTPerror(int number, String message) {
         length = 4 + message.length() + 1;
@@ -188,6 +197,7 @@ class TFTPerror extends TFTPpacket {
     public int number() {
         return this.get(numOffset);
     }
+
     public String message() {
         return this.get(msgOffset, (byte) 0);
     }
@@ -202,6 +212,7 @@ final class TFTPack extends TFTPpacket {
     // Constructors
     protected TFTPack() {
     }
+
     //Generate ack packet
     public TFTPack(int blockNumber) {
         length = 4;

src/main/java/ru/redguy/tftpserver/TFTPserverRRQ.java

@@ -1,7 +1,10 @@
 package ru.redguy.tftpserver;
 
-import java.net.*;
+import java.io.File;
-import java.io.*;
+import java.io.FileInputStream;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.SocketTimeoutException;
 
 
 class TFTPserverRRQ extends Thread {
@@ -46,6 +49,7 @@ class TFTPserverRRQ extends Thread {
             event.onClientReadException(e, request);
         }
     }
+
     //everything is fine, open new thread to transfer file
     public void run() {
         int bytesRead = TFTPpacket.maxTftpPakLen;
@@ -64,21 +68,25 @@ class TFTPserverRRQ extends Thread {
                     while (timeoutLimit != 0) {
                         try {
                             TFTPpacket ack = TFTPpacket.receive(sock);
-							if (!(ack instanceof TFTPack)){throw new Exception("Client failed");}
+                            if (!(ack instanceof TFTPack)) {
+                                throw new Exception("Client failed");
+                            }
                             TFTPack a = (TFTPack) ack;
 
                             if (a.blockNumber() != blkNum) { //check ack
-								throw new SocketTimeoutException("last packet lost, resend packet");}
+                                throw new SocketTimeoutException("last packet lost, resend packet");
+                            }
                             /*System.out.println("confirm blk num " + a.blockNumber()+" from "+a.getPort());*/
                             break;
-						} 
+                        } catch (SocketTimeoutException t) {//resend last packet
-						catch (SocketTimeoutException t) {//resend last packet
                             System.out.println("Resent blk " + blkNum);
                             timeoutLimit--;
                             outPak.send(host, port, sock);
                         }
                     } // end of while
-					if(timeoutLimit==0){throw new Exception("connection failed");}
+                    if (timeoutLimit == 0) {
+                        throw new Exception("connection failed");
+                    }
                 }
                 System.out.println("Transfer completed.(Client " + host + ")");
                 System.out.println("Filename: " + fileName + "\nSHA1 checksum: " + CheckSum.getChecksum(fileName) + "\n");

src/main/java/ru/redguy/tftpserver/TFTPserverWRQ.java

@@ -1,7 +1,10 @@
 package ru.redguy.tftpserver;
 
-import java.net.*;
+import java.io.File;
-import java.io.*;
+import java.io.FileOutputStream;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.SocketTimeoutException;
 
 
 class TFTPserverWRQ extends Thread {
@@ -85,7 +88,9 @@ class TFTPserverWRQ extends Thread {
                             timeoutLimit--;
                         }
                     }
-					if(timeoutLimit==0){throw new Exception("Connection failed");}
+                    if (timeoutLimit == 0) {
+                        throw new Exception("Connection failed");
+                    }
                 }
                 outFile.close();
                 System.out.println("Transfer completed.(Client " + host + ")");

src/main/java/ru/redguy/tftpserver/datasource/FileSystem.java

@@ -1,7 +1,5 @@
 package ru.redguy.tftpserver.datasource;
 
-import ru.redguy.tftpserver.IDataSource;
-
 import java.io.File;
 import java.nio.file.Path;
 

src/main/java/ru/redguy/tftpserver/datasource/IDataSource.java

@@ -1,4 +1,4 @@
-package ru.redguy.tftpserver;
+package ru.redguy.tftpserver.datasource;
 
 public interface IDataSource {
     public boolean isFileExists(String localPath);