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); } }
java保留小数点后几位,不足的用0补
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转载自blog.csdn.net/huangcsdnjava/article/details/79320816
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