如何将字符串23323.00转换为Long

Question

String avgPageLoadTimeStr = row.get("avg_page_load_time");
Long avgPageLoadTime = Long.parseLong(avgPageLoadTimeStr);

For example :

avgPageLoadTimeStr = 52747.50;

How to convert avgPageLoadTimeStr to Long ?

Answer 1

52747.50 is a floating point number. So you should first parse it to a floating point number and then round it to a long value:

String avgPageLoadTimeStr = row.get("avg_page_load_time");
double d = Double.parseDouble(avgPageLoadTimeStr);
long avgPageLoadTime = Math.round(d);

Depending on your needs you could also use Math.floor() or Math.ceil() before rounding it to a long value.

Answer 2

You will get a NumberFormatException , because "52747.50" is a floating point number.

Thus you can use Double to parse it and get the long value.

String avgPageLoadTimeStr = "52747.50";
Double doubleObj = new Double(avgPageLoadTimeStr);
long longValue = doubleObj.longValue();
System.out.println(longValue);

or simply

long longValue = (long) Double.parseDouble(avgPageLoadTimeStr);