Converting string to double with dot [duplicate]

问题

This question already has answers here:

How do I print a double value without scientific notation using Java? (15 answers)

Closed 4 years ago.

I need to convert string value to double with dot. Here is simple code

double dValue=Double.parseDouble("999999999.99");
System.out.println(dValue);
output is: 9.9999999999E8

When i gave value like 10000 or 100000 it works. Help me to overcome this problem.

回答1:

You could use BigDecimal and toPlainString() for that.

BigDecimal dValue= new BigDecimal("999999999.99");  
System.out.println(dValue.toPlainString());

Output:

999999999.99

回答2:

You can use String.format

System.out.println(String.format("%.2f", dValue));

来源：https://stackoverflow.com/questions/36474338/converting-string-to-double-with-dot