java.text.DecimalFormat df = new java.text.DecimalFormat("#,##0.0");
Double val = new Double(4385.1005) ;
System.out.println(df.format(val.doubleValue()));
Double val = new Double(4385.1005) ;
System.out.println(df.format(val.doubleValue()));
double k=98.76;k=df.format(k.doubleValue());
报错:double cannot be dereferenced