java - Serialization of a class inside the class -

-

i'm trying make class singleton have serialize method. objective serialize singleton in own function. there way serialize class inside class ?

here sample of tried :

public void serialize() {     singleton commit = this.getinstance();      try {         fileoutputstream fileout = new fileoutputstream(new config().getdatafile());         objectoutputstream out = new objectoutputstream(fileout);         out.writeobject(commit);         out.close();         fileout.close();     } catch (exception e) {         system.out.println("unable commit database changes.");         e.printstacktrace(system.out);     } }

and stack trace below :

unable commit database changes. java.io.notserializableexception: com.cuistot.data.singleton     @ java.io.objectoutputstream.writeobject0(objectoutputstream.java:1184)     @ java.io.objectoutputstream.writeobject(objectoutputstream.java:348)     @ [...].singleton.serialize(singleton.java:50)     [...]

does class implement serializable?

looking @ source code for objectoutputstream.writeobject0, throws notserializableexception if object not serializable.


Comments

Post a Comment

Popular posts from this blog

How to run C# code using mono without Xamarin in Android? -

-
i want create program uses mono runtime run c# code (binary not application). i copied libmono.so unity app , i'm write code using documentation: http://www.mono-project.com/docs/advanced/embedding/ and it's working have problems references can access classes mscorlib.dll , have problems system.reflection.assembly class throwing exception, when print console see: system.missingmethodexception: method not found: 'system.reflection.assembly.op_inequality' can fix it? can use mono runtime in c binary on android? ps. i'm using android tests. edit: found solution loading libraries, need set environment variable mono_path libraries path. but have still problems assembly class. the system.missingmethodexception error have seems .net profile mismatch error, 1 explained here . can use mono runtime in c binary on android? yes, using ndk guess. there alternatives can use instead of rolling own, such xmadevlab .
Read more

html - grunt SVG to webfont -

-
i'm trying generate webfont svgs using grunt-webfont . the issue need task valid on windows , linux machines. in order achieve need use node engines doesn’t work svg files . i know if there way convert svgs proper svg format supported grunt plugin or alternatively there better grunt plugin/s achieve this i have task able take svgs (created in illustrator) , output webfont files (.eot,.svg,.svg,...) , css file (like icomoon export) thanks. perhaps artboard small. recommend checking have 512pt x 512pt artboard each icon. stumbled upon gem ( https://www.fourdigits.nl/blog/using-a-webfont-to-display-icons ) when grunt-webfont documentation left me alone in forest.
Read more

python - Specify path of savefig with pylab or matplotlib -

-
i struggling on how find correct way specify save path (or repository) when calling function savefig in matplotlib or pylab. i tried several syntaxes, everytime python console returns : filenotfounderror: [errno 2] no such file or directory: '../mydocs/resource/frames/myimage.png' currently, have written following : pylab.savefig('../mydocs/resource/frames/myimage.png') does know how it? thanks in advance! the tilde operator , variable $home entered strings , therefore not function while saving. have provide either relative path (as did) or provide full path. eg. pylab.savefig("/home/username/desktop/myfig.png") .
Read more