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authorRobert Rose <bertra97@gmail.com>2015-10-12 17:19:35 -0400
committerRobert Rose <bertra97@gmail.com>2015-10-12 17:19:35 -0400
commit8cb9e5395b2a21fe8e86455f5a5729a60435524c (patch)
treece0eaf4a1ed7f510cdffe743f5969c6900b9eb1c /java.html.markdown
parent070e53dd852c35c32fb82f542b5af57c46e4782c (diff)
Updated Java tutorial with BigInteger and BigDecimal.
Diffstat (limited to 'java.html.markdown')
-rw-r--r--java.html.markdown30
1 files changed, 30 insertions, 0 deletions
diff --git a/java.html.markdown b/java.html.markdown
index 67e5494e..55daa5bb 100644
--- a/java.html.markdown
+++ b/java.html.markdown
@@ -95,11 +95,13 @@ public class LearnJava {
// Note: Java has no unsigned types.
// Float - Single-precision 32-bit IEEE 754 Floating Point
+ // 2^-149 <= float <= (2-2^-23) * 2^127
float fooFloat = 234.5f;
// f or F is used to denote that this variable value is of type float;
// otherwise it is treated as double.
// Double - Double-precision 64-bit IEEE 754 Floating Point
+ // 2^-1074 <= x <= (2-2^-52) * 2^1023
double fooDouble = 123.4;
// Boolean - true & false
@@ -115,6 +117,34 @@ public class LearnJava {
final double E;
E = 2.71828;
+
+ // BigInteger - Immutable arbitrary-precision integers
+ //
+ // BigInteger is a data type that allows programmers to manipulate
+ // integers longer than 64-bits. Integers are stored as an array of
+ // of bytes and are manipulated using functions built into BigInteger
+ //
+ // BigInteger can be initialized using an array of bytes or a string.
+
+ BigInteger fooBigInteger = new BigDecimal(fooByteArray);
+
+
+ // BigDecimal - Immutable, arbitrary-precision signed decimal number
+ //
+ // A BigDecimal takes two parts: an arbitrary precision integer
+ // unscaled value and a 32-bit integer scale
+ //
+ // BigDecimal allows the programmer complete control over decimal
+ // rounding. It is recommended to use BigDecimal with currency values
+ // and where exact decimal percision is required.
+ //
+ // BigDecimal can be initialized with an int, long, double or String
+ // or by initializing the unscaled value (BigInteger) and scale (int).
+
+ BigDecimal fooBigDecimal = new BigDecimal(fooBigInteger, fooInt);
+
+
+
// Strings
String fooString = "My String Is Here!";