title: Use of java.math.MathContext
body: <p>Recently I tried understanding the use of <strong>java.math.MathContext</strong> but failed to understand properly. Is it used for rounding in <code>java.math.BigDecimal</code>. If yes why does not it round the decimal digits but even mantissa part.</p>
  
  <p>From API docs, I came to know that it follows the standard specified in <code>ANSI X3.274-1996</code> and <code>ANSI X3.274-1996/AM 1-2000</code> specifications but I did not get them to read online.</p>
  
  <p>Please let me know if you have any idea on this.</p>