Arraylist Save and Load

HI i am using this syntax to store arraylist to inventory.dat file.When i store, it give a scattered output on the .dat file like this.....

¬í sr Carsguimainexecution.SaleinfoÕE£ñWfö
L productsalest Ljava/util/ArrayList;xpsr java.util.ArrayListx�Ò™Ça�
I sizexp w
sr Carsguimainexecution.SalesubZã¾�ÓÅ xr Carsguimainexecution.SaleProductøié>‘2q I CarnumberD pricesoldI
productNumberD stockD unitsoldL Carbuyert Ljava/lang/String;L Carnameq ~ xp t Defaultq ~ sq ~  @I
@@ @$ t dsdggsdrft fgsgsfsq ~  @�@ @Å| @& t dfgdrht gyjgyjsq ~  @�@ @Çp @( t dfsbt fddndfsq ~  @�@ @È @$ t sdfsdft sdfsfsfsq ~  @$ @y @D t dsdgrght hdhdhsq ~  @$ @�@ @Y t fbdfbt dfbdfbsq ~  @$ @Y @$ t defaultt defaultsq ~   t Defaultt Defaultx


Is the output an error or its correct,and if its correct how can i load this information back to an arraylist.

To Store,this is what i use excluding the try and catch:-

Code :

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File f = new File( "C:\\data\\inventory.dat" );
FileOutputStream out = new FileOutputStream( f );
ObjectOutputStream objectOut = new ObjectOutputStream( out );
objectOut.writeObject( inv );

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This is a sample of how my arraylist looks like;

Code :

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products.add( new CarsSubProduct( "FordMustang",1,1000,10000 ) );

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Please any advice will be really helpful.

That looks alright, Java just serialises it all into the file.

How about using an ObjectInputStream to read it back?

See Create ObjectInputStream from FileInputStream : ObjectInputStreamFileJava Tutorial

// Json