java保留小数点后几位,不足的补0
public class Test {
public static void main(String[] args) {
String result = Test.roundByScale(2.00, 2);
System.out.println(result);
}
public static String roundByScale(double v, int scale) {
if (scale < 0) {
throw new IllegalArgumentException(
"The scale must be a positive integer or zero");
}
if (scale == 0) {
return new DecimalFormat("0").format(v);
}
String formatStr = "0.";
for (int i = 0; i < scale; i++) {
formatStr = formatStr + "0";
}
return new DecimalFormat(formatStr).format(v);
}
}本文为胖虎原创文章,转载无需和我联系,但请注明来自胖虎博客panghucat.cn