Value Format While Reading Excel Data Into Java

I am reading Excel data using java apache. I got format issue while reading double value such as 869.87929 (in excel) into 869.8792899999999 (in java).

I'm using following files to read excel data.

1. Schema.csv: SheetName,2-int-Double
2. File.xls:

col1 | col2
123 | 869.87929

Sample code:

if(type.equals("Double")){
String str = content[i-1];
//System.out.println(str);
BigDecimal d = new BigDecimal(str);
listObjects.add(d);
}

Note: type from schema.csv & content [] value from file.xls
If I print **str**, it shows value as 869.8792899999999.
But i need to get **str** value as 869.87929. How can I get it?