1、
double d = 121113456789123456.789D;System.out.println(String.format("%.4f", d));double d = 121113456789123456.789D;System.
1、
double d = 121113456789123456.789D;System.out.println(String.format("%.4f", d));double d = 121113456789123456.789D;System.