The # Flag : Formatter Flags « Development « Java Tutorial






  1. Java Tutorial
  2. Development
  3. Formatter Flags

The # flag can be applied to the %o, %x, %e, and %f format specifiers.

For %e and %f, the # ensures that there will be a decimal point even if there are no decimal digits.

Preceding the %x specifier with a #, the hexadecimal number will be printed with a 0x prefix.

Preceding the %o specifier with # causes the number to be printed with a leading zero.

import java.util.Formatter;

public class MainClass {
  public static void main(String args[]) {
    Formatter fmt = new Formatter();

    fmt.format("%#e", 1F);
    System.out.println(fmt);

  }
}

1.000000e+00




6.6.Formatter Flags
6.6.1.Using the Format Flags
6.6.2.The %n inserts a newline: the %n and %% format specifiers
6.6.3.Left justification
6.6.4.The Space, +, 0, and '(' Flags: To show a '+' sign before positive numeric values, add the + flag
6.6.5.Demonstrating the space format specifiers
6.6.6.To show negative numeric output inside parentheses, rather than with a leading -, use the '(' flag
6.6.7.The 0 flag
6.6.8.The Comma Flag(,) : to add grouping specifiers
6.6.9.The # Flag
6.6.10.format: %#x
6.6.11.format: %#o
6.6.12.Demonstrate the %g format specifier.