Format number with ###E0 (exponent must be multiple of 3) in Java
Description
The following code shows how to format number with ###E0 (exponent must be multiple of 3).
Example
//from w w w .j a v a2s .co m
import java.text.DecimalFormat;
public class Main {
public static void main(String[] argv) {
DecimalFormat formatter = new DecimalFormat("###E0");
String s = formatter.format(-1234.567); // -1.23E3
System.out.println(s);
s = formatter.format(-123.4567); // -123E0
System.out.println(s);
s = formatter.format(-12.34567); // -12.3E0
System.out.println(s);
s = formatter.format(-1.234567); // -12.3E0
System.out.println(s);
s = formatter.format(-.1234567); // -123E-3
System.out.println(s);
}
}
The code above generates the following result.