Java rounded to reserved decimal places, java rounded to decimal places

Java rounded to reserved decimal places, java rounded to decimal places

// Method 1:

Double f = 3.1516;

BigDecimal B = new BigDecimal (f );

Double f1 = B. setScale (2, BigDecimal. ROUND_HALF_UP). doubleValue ();

// Method 2:

New java. text. DecimalFormat ("#. 00"). format (3.1415926 );

// #. 00 indicates two decimal places #. 0000 four decimal places and so on...

// Method 3:

Double d = 3.1415926;

String result = String. format ("%. 2f", d );

// %. 2f %. indicates any number of digits before the decimal point. 2 indicates that the result of two decimal places is f, indicating the floating point type.

// Method 4:

Math. round (5.2644555*100) * 0.01d;

// String. format ("% 0" + 15 + "d", 23) If 23 is less than 15, add 0 in front.