public class $66 {    public static void main(String agrs[])    {        float a=(float) 1.123456789;//8位        System.out.println(a);//1.1234568            double aa=10.123456789123456789;//17位        System.out.println(aa);//    10.123456789123457    }}

 

1 public class $66 { 2  3     public static void main(String agrs[]) 4     { 5         float a=(float) 12.123456789;//8位 6         System.out.println(a);//12.123457 7      8  9         double aa=101.123456789123456789;//17位10         System.out.println(aa);//    10.12345678912345711     }12 }