multithreading - Serialization of chess game logic not succesful after clicking on "save game" button in Java GUI -

i writing quite simple chess game separate gui , logic.the "save game" button starts save filedialog , there user chosen directory , file name passed savegame method in game logic class. there create file fileoutputstream , try write file objectoutputstream. ioexception raised , dont know why.

here snippet of how game class looks, logic part of chess game program.

public class game implements runnable, serializable {  private final board board; private final transient moveevaluate moveevaluator;  private final logger log = logger.getlogger("game");  private  transient boardgui gamegui;  private boolean whiteonmove; private boolean gameover = false; private boolean customboardsetup = true; private boolean setupisdone = false;  public game() {     log.log(level.severe, "game created");     this.board = new board();     this.whiteonmove = true;     this.moveevaluator = new moveevaluate(this); } 

this save game method whis inside game class. method called gui action click listener.

 public void savegame(string directoryname, string filename) {      try {         fileoutputstream fileout = new fileoutputstream(directoryname+filename+".ser");         objectoutputstream out = new objectoutputstream(fileout);         out.writeobject(this);         out.close();      catch (ioexception e) {         e.printstacktrace();         log.log(level.severe, "exception while serializing : ioexception");     } } 

i have in method out.writeobject(this); of think problem. game class implements runnable.

the question problem . , how handle serialization of logic when gui , logic threads running. thank you

here stack trace ioexception

    severe: file crated: c:\users\dagmar kole4k85ov8\desktop\l.ser kv? 29, 2016 10:32:30 dop. com.mycompany.chess.game savegame severe: fileout: c:\users\dagmar kole4k85ov8\desktop\l.ser kv? 29, 2016 10:32:30 dop. com.mycompany.chess.game savegame severe: objectoutputstream made java.io.notserializableexception: java.util.logging.logger     @ java.io.objectoutputstream.writeobject0(objectoutputstream.java:1184)     @ java.io.objectoutputstream.defaultwritefields(objectoutputstream.java:1548)     @ java.io.objectoutputstream.writeserialdata(objectoutputstream.java:1509)     @ java.io.objectoutputstream.writeordinaryobject(objectoutputstream.java:1432)     @ java.io.objectoutputstream.writeobject0(objectoutputstream.java:1178)     @ java.io.objectoutputstream.defaultwritefields(objectoutputstream.java:1548)     @ java.io.objectoutputstream.writeserialdata(objectoutputstream.java:1509)     @ java.io.objectoutputstream.writeordinaryobject(objectoutputstream.java:1432)     @ java.io.objectoutputstream.writeobject0(objectoutputstream.java:1178)     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:348)     @ com.mycompany.chess.game.savegame(game.java:170)     @ com.mycompany.chess.gamegui.savegame(gamegui.java:54)     @ com.mycompany.chess.boardmenugui.actionperformed(boardmenugui.java:46)     @ javax.swing.abstractbutton.fireactionperformed(abstractbutton.java:2022)     @ javax.swing.abstractbutton$handler.actionperformed(abstractbutton.java:2346)     @ javax.swing.defaultbuttonmodel.fireactionperformed(defaultbuttonmodel.java:402)     @ javax.swing.defaultbuttonmodel.setpressed(defaultbuttonmodel.java:259)     @ javax.swing.plaf.basic.basicbuttonlistener.mousereleased(basicbuttonlistener.java:252)     @ java.awt.component.processmouseevent(component.java:6525)     @ javax.swing.jcomponent.processmouseevent(jcomponent.java:3321)     @ java.awt.component.processevent(component.java:6290)     @ java.awt.container.processevent(container.java:2234)     @ java.awt.component.dispatcheventimpl(component.java:4881)     @ java.awt.container.dispatcheventimpl(container.java:2292)     @ java.awt.component.dispatchevent(component.java:4703)     @ java.awt.lightweightdispatcher.retargetmouseevent(container.java:4898)     @ java.awt.lightweightdispatcher.processmouseevent(container.java:4533)     @ java.awt.lightweightdispatcher.dispatchevent(container.java:4462)     @ java.awt.container.dispatcheventimpl(container.java:2278)     @ java.awt.window.dispatcheventimpl(window.java:2739)     @ java.awt.component.dispatchevent(component.java:4703)     @ java.awt.eventqueue.dispatcheventimpl(eventqueue.java:746)     @ java.awt.eventqueue.access$400(eventqueue.java:97)     @ java.awt.eventqueue$3.run(eventqueue.java:697)     @ java.awt.eventqueue$3.run(eventqueue.java:691)     @ java.security.accesscontroller.doprivileged(native method)     @ java.security.protectiondomain$1.dointersectionprivilege(protectiondomain.java:75)     @ java.security.protectiondomain$1.dointersectionprivilege(protectiondomain.java:86)     @ java.awt.eventqueue$4.run(eventqueue.java:719)     @ java.awt.eventqueue$4.run(eventqueue.java:717)     @ java.security.accesscontroller.doprivileged(native method)     @ java.security.protectiondomain$1.dointersectionprivilege(protectiondomain.java:75)     @ java.awt.eventqueue.dispatchevent(eventqueue.java:716)     @ java.awt.eventdispatchthread.pumponeeventforfilters(eventdispatchthread.java:201)     @ java.awt.eventdispatchthread.pumpeventsforfilter(eventdispatchthread.java:116)     @ java.awt.eventdispatchthread.pumpeventsforhierarchy(eventdispatchthread.java:105)     @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:101)     @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:93)     @ java.awt.eventdispatchthread.run(eventdispatchthread.java:82) kv? 29, 2016 10:32:30 dop. com.mycompany.chess.game savegame severe: exception while serializing : ioexception 

i found mistake myself. problem logger wasn't set transient @ classes being serialized. after adding transient all, game succesfully saved.