Display numbers in scientific notation : DecimalFormat « I18N « Java Tutorial

1. Java Tutorial
2. I18N
3. DecimalFormat

import java.text.DecimalFormat;
import java.text.NumberFormat;

public class Main {

  public static void main(String args[]) {
    NumberFormat formatter = new DecimalFormat();

    int maxinteger = Integer.MAX_VALUE;
    System.out.println(maxinteger); 
    formatter = new DecimalFormat("0.######E0");
    System.out.println(formatter.format(maxinteger));

    formatter = new DecimalFormat("0.#####E0");
    System.out.println(formatter.format(maxinteger));

    int mininteger = Integer.MIN_VALUE;
    System.out.println(mininteger); 

    formatter = new DecimalFormat("0.######E0");
    System.out.println(formatter.format(mininteger)); 

    formatter = new DecimalFormat("0.#####E0");
    System.out.println(formatter.format(mininteger));

    double d = 0.12345;
    formatter = new DecimalFormat("0.#####E0");
    System.out.println(formatter.format(d));

    formatter = new DecimalFormat("000000E0");
    System.out.println(formatter.format(d)); 
  }
}

13.13.DecimalFormat
	13.13.1.	new DecimalFormat('0.00')
	13.13.2.	new DecimalFormat('#.#') two digits
	13.13.3.	new DecimalFormat('#.######') more digits
	13.13.4.	new DecimalFormat('.######'), keep fraction
	13.13.5.	new DecimalFormat('#.000000'), append zero
	13.13.6.	new DecimalFormat('#,###,###'), group
	13.13.7.	Arabic Digits
	13.13.8.	Format a number with leading zeros
	13.13.9.	The . symbol indicates the decimal point
	13.13.10.	The , symbol is used to group numbers
	13.13.11.	The ; symbol is used to specify an alternate pattern for negative values
	13.13.12.	The ' symbol is used to quote literal symbols
	13.13.13.	Use group separators and show trailing zeros
	13.13.14.	Display numbers in scientific notation
	13.13.15.	Displaying numbers with commas
	13.13.16.	new DecimalFormat('##00')
	13.13.17.	The 0 symbol shows a digit or 0 if no digit present