Primitive Data Types in Java

http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html

Type	Explanation	Default Value, Minimum, Maximum			Example
byte	A 8-bit (1-byte) integer value	0	-127	127	byte b = 1;
short	A 16-bit (2-byte) integer value	0	-32,768	32,767	short s = 10;
int	A 32-bit (4-byte) integer value	0	-2,147,483,648	2,147,483,647	int i = 32;
long	An 64-bit (8-byte) integer value	0L	-263	263-1	long l = 100L;
float	A 32-bit (4-byte) floating-point value	0.0f			float f = 150.5f ;
double	A 64-bit (8-byte) floating-point value	0.0d			double d = 155.5d;
boolean	A true or false value	false
char	A 16-bit character using the Unicode encoding scheme	‘\u000’

million billion trillion

Number of zeros	U.S. & scientific community	Example
3*1=3	thousand	1,000
3*2=6	million	1,000,000
3*3=9	billion	1,000,000,000
3*4=12	trillion
3*5=15	quadrillion
3*6=18	quintillion
3*7=21	sextillion
3*8=24	septillion
3*9=27	octillion
3*10=30	nonillion
3*11=33	decillion
3*12=36	undecillion
3*13=39	duodecillion
3*14=42	tredecillion
3*15=45	quattuordecillion
3*16=48	quindecillion
3*17=51	sexdecillion
3*18=54	septendecillion
3*19=57	octodecillion
3*20=60	novemdecillion
3*21=63	vigintillion

which goes to stack and which goes to heap

Heap	Stack
Part of the memory allocated to the JVM by the OS
Objects are created in Heap (Slow Memory)	Primitive variables
Consists of new, old (tenured) and perm generation

difference between median and geometric mean

Arithmetic mean (Generally known as Mean)	Geometric mean	Median
The arithmetic mean is calculated by adding up all the numbers in a data set and dividing the result by the total number of data points.	The geometric mean of a data set is calculated by multiplying the numbers in the data set, and taking the nth root of the result, where "n" is the total number of data points in the set.	The median of a data set is the middle number when the set is sorted in numerical order. For odd number of data points, take the value in the middle. In an even-numbered data set, you take the mean of the middle two numbers.
Arithmetic mean of 10,12,13,200 = (10 + 12 + 13 + 200) / 4 = 58.75	Geometric  mean of 10,12,13,200 = 4th root of (10 * 12 * 13 * 200) = 23.63	Median of 10,12,13,200 = (12 + 13) / 2 = 12.5 Median of 10,12,13,15,200 = 13
Use when no outliers	Use when there are outliers	When there is good difference between Median and Mean, then we need to look into the data set ever deeper... May be there is a need to apply other statistical methods…

Google Wallet Fees

As of 04-Dec-2013.

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