Java Format Alternate Conversion

In this chapter you will learn:

What is Java Format Alternate Conversion
Syntax for Java Format Alternate Conversion
Example - Java Format Alternate Conversion
Example - the hexadecimal number
Example - the octal number

Description

# sets alternate conversion format.

The # can be applied to %o, %x, %e, and %f.

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

Syntax

fmt.format("%#f", 1.0);

Example


import java.util.Formatter;
//from  w  ww  .  j  a  v  a  2 s  . co m
public class Main {
  public static void main(String args[]) {
    Formatter fmt = new Formatter();
    fmt.format("%#f", 1.0); 
    System.out.println(fmt);
  }
}

The output:

Example 2

If you precede the %x format specifier with a #, the hexadecimal number will be printed with a 0x prefix.


import java.util.Formatter;
// w  w  w  . j  a v  a2 s.c o  m
public class Main {
  public static void main(String args[]) {
    Formatter fmt = new Formatter();
    fmt.format("%#X", 1); 
    System.out.println(fmt);
  }
}

The output:

Example 3

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


import java.util.Formatter;
//from  w  ww  .j a  v a  2s.  c o m
public class Main {
  public static void main(String args[]) {
    Formatter fmt = new Formatter();
    fmt.format("%#o", 1); 
    System.out.println(fmt);
  }
}

The output:

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What you will learn in the next chapter:

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Java Formatter Class
Java Format Specifier
Java Format Specifier Uppercase
Java Format Precision
Java Format Flags
Java Format Justifying Output
Java Format Negative and Positive
Java Format Line up Space
Java Format Parentheses
Java Format Zero Padding
Java Format Comma

Java Format Alternate Conversion

Java Format Argument Index
Java Format date time
Java Format Date