Log File Parsing - Find A Value For Variable And Send To Database

I am new to java coding. so reading the log file using java code.

1) I wish to parse a file, and find a value for variable e.g. [StorageVersion].
2) After finding the value, it will be pushed to database.

Log File Path e.g. C:Temp est.txt"

Sample Logs :
{
//NAME
[1.2.2917] := s['3.4.454545'];

//Parameter
[1.2.2947] := s['1.2.56778'];

//Enabled
[1.2.3910] := B['22.43434.12232'];

//MAXCLOUMNNAME
[1.2.4217] := N['1.7.899982'];

//StorageVersion
[1.2.2917] := K['706146.0.22106932'];
}

From above log file, the Value i need is "706146.0.22106932"