What can I do against floating point notations Errors?

 

This question already has an answer here:

  • Why Are Floating Point Numbers Inaccurate? 3 answers
  • Why not use Double or Float to represent currency? 14 answers

    • You can use double for more precision (or BigDecimal if you expect to work with very big numbers). 

    String aa = "1000009.00";
double bb = Double.parseDouble(aa);
bb=Math.round(bb*100);
System.out.printf("%.2f", bb); // it prints only two digits after the decimal point

    Output 

    100000900.00

    You can use BigDecimal::multiply for example : 

    String aa = "1000009.00";
aa = aa.replaceAll(",", ".");
BigDecimal fullValue = new BigDecimal(aa);

System.out.println("full value  = " + fullValue.multiply(new BigDecimal(100)));

    Output 

    full value  = 100000900.00
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