double数字除法与格式化 百分比等

1.百分比

String str = "300";
double d = Double.valueOf(str);
double dd = (double)d/600;

DecimalFormat format = new DecimalFormat("0.00%");
String result = format.format(dd);
System.out.println(result);

 

2.固定位数

String str = "0.15";
double d = Double.valueOf(str);
double dd = (double) d / 1000; DecimalFormat format = new DecimalFormat("0.00000");
String result = format.format(dd);
System.out.println(result);