Java - Format number to print decimal portion only

Question

Is there a simple way in Java to format a decimal, float, double, etc to ONLY print the decimal portion of the number? I do not need the integer portion, even/especially if

Answer 1

This will print 0.3

double x = 23.8;
int y =(int)x;
float z= (float) (x % y);
System.out.println(z);