Java Data Type Q&A Questions and Answers

1. Java Data Type Q&A

bigdecimal /

alternative 1	ArithmeticException 1
bigdecimal 88	c 1
convert 7	currency 3
decimal 8	digit 2
divide 7	double 16
Encoding 2	equal 1
exception 2	Financial 2
float 4	format 3
logarithm 1	Long 4
math 12	MathContext 2
memory 1	money 3
optimization 2	parse 4
power 2	precision 5
Root 2	round 37
scale 5	scientific 3
String 15	stripTrailingZeroes 2
trail 4	trim 3
valueof 3	zero 4

biginteger /

BigDecimal 7	biginteger 88
bit 2	byte 5
convert 3	cryptography 3
digit 4	encrypt 1
format 3	long 1
math 6	overflow 3
pow 4	power 4
prime 4	random 5
root 3	sign 2
square 1	String 7
toByteArray 3	valueOf 3

bit /

128 bit 3	16 bit 8
24 bit 2	32 Bit 21
64 bit 1 100	64 bit 2 8
64 bit JVM 20	64 bit OS 1
AES 7	ascii 3
binary 14	bit 1 100
bit 2 50	bitwise 42
bufferedimage 7	c 5
character 6	Convert 15
cryptography 9	encrypt 2
enum 4	exception 1
hex 9	image 7
long 13	manipulation 7
mask 5	math 3
memory 6	Negative Number 5
operation 19	operator 46
Pattern 5	pixel 4
Primitive 6	shift 32
sign 2	size 6
tiff 4	ZipException 1

Boolean /

assignment 3	autobox 5
beanutils 1	bit 8
bitwise 5	Boolean 1 100
Boolean 2 90	Cast 4
Char 3	condition 9
convert 13	equal 9
error 11	exception 5
expression 30	false 12
getBoolean 4	inverse 3
JavaBean 5	logic 7
loop 11	memory 6
method 39	object 9
operator 11	parameter 5
reflection 1	return 30
size 11	statement 18
switch 4	true 9
value 27	variable 19
volatile 1	wrapper 1

byte /

audio 2	binary 8
bit 37	bitwise 7
buffer 8	BufferedImage 5
byte 1 100	byte 2 100
byte 3 59	bytearray 9
bytecode 4	Cast 9
character 19	compare 7
convert 1 100	convert 2 28
decrypt 3	encoding 11
encrypt 5	filewriter 3
hex 19	image 14
jni 5	jprofiler 1
JVM 3	limit 4
Literal 6	long 8
memory 6	offset 2
order 2	OutOfMemoryError 3
parse 5	random 3
range 4	read 27
sequence 6	short 11
sign 14	size 11
split 3	stream 2
unicode 8	utf8 5
wrapper 3

Calendar /

add 21	before 8
Calendar 1 100	Calendar 2 100
Calendar 3 85	compare 16
convert 27	date 1 100
date 2 12	day 21
DST 12	getInstance 11
getTime 11	Gregorian 1
GregorianCalendar 18	locale 7
Month 34	schedule 4
String 26	time 36
timezone 29	util 39
week 40	year 19

cast /

autobox 1	Automatic 7
c 5	cast 1 100
cast 2 35	child 2
Class 36	compiler 6
convert 15	DefaultListModel 3
Downcast 5	Dynamic 18
entity 2	error 15
Exception 54	Explicit 6
extend 2	graphics 1
graphics2d 3	gson 1
implicit 1	instanceof 2
jni 5	jruby 4
jvm 5	List 10
long 5	memory 1
method 8	null 4
object 64	oop 4
operation 1	operator 6
parse 5	precision 1
primitive 12	problem 30
question 22	reflection 10
runtime 13	safe 4
sign 1	statement 4
type 61	unchecked 10
variable 20	warn 7

character /

Arabic 9	ascii 17
Backspace 3	binary 12
bit 7	bufferedreader 1
byte 9	C 5
carriage 4	char 1 100
char 2 100	char 3 23
character 1 100	character 2 100
character 3 100	character 4 100
character 5 46	charset 4
check 59	Chinese 15
compare 49	console 1
convert 1 100	convert 2 79
count 44	DecimalFormat 1
decode 13	display 46
Encode 10	encoding 61
encrypt 4	english 4
equal 6	escape 50
Font 9	Format 11
French 5	Generator 2
hex 6	html 11
Illegal 16	image 4
input 38	intellij 1
internationalization 10	invalid 3
isLetter 4	japanese 24
jni 7	json 6
letter 8	literal 14
loop 15	multibyte 7
newline 17	number 34
operator 7	parse 18
password 8	Pattern 10
pdf 10	primitive 7
print 46	random 23
read 57	Recognition 6
remove 79	replace 1 100
replace 2 2	resourcebundle 3
scanner 8	search 12
size 9	slash 5
space 19	Spanish 4
special 68	split 28
stream 1	Tab 6
text 10	Type 26
unicode 49	utf 4
utf8 2	value 33
variable 7	whitespace 4
Wildcard 3	word 12
write 15

Date Time /

add 64	calculate 62
calculation 18	calender 11
compare 1 100	compare 2 26
Convert 1 100	Convert 2 89
current 53	date 1 100
date 2 100	date 3 100
date 4 100	date 5 100
date 6 100	date 7 100
date 8 100	date 9 43
datetime 1 100	datetime 2 6
DAY 94	Daylight 11
difference 48	dst 10
excel 11	find 25
Format 1 100	Format 2 100
Format 3 100	Format 4 100
Format 5 79	GMT 19
Gregorian 2	hour 24
jodatime 75	list 14
locale 33	milliseconds 32
month 54	parse 1 100
parse 2 28	query 10
range 21	schedule 7
Sort 10	String 73
time 1 100	time 2 31
timestamp 1 100	timestamp 2 20
type 23	Unparseable 24
UTC 23	validation 63
WEEK 47	YEAR 54

Date Time Format /

capitalize 1	convert 6
Date Time Format 30	date 6
datetime 1	day 3
Excel 2	format 14
jodatime 2	locale 4
localization 2	month 2
parse 8	ParseException 2
Pattern 4	strftime 1
String 7	Text 3
time 3	timezone 6
year 2

decimal /

Ascii 7	binary 17
bit 4	byte 2
character 2	comma 5
convert 1 100	convert 2 4
currency 2	decimal 81
DecimalFormat 2	decode 2
digit 15	divide 5
double 10	expansion 2
exponential 1	float 8
format 70	fraction 6
hex 2	hexadecimal 2
length 1	locale 4
long 1	math 3
numberformat 2	octal 4
output 4	place 85
point 17	precision 6
restrict 2	round 25
scientific 3	separator 5
string 10	Trim 3
value 14

Development /

base64 66	equal 1 100
equal 2 2	Exception 1 100
Exception 2 20	format 1 100
format 2 100	format 3 10
getResourceAsStream 7	ImageIO 5
initialization 18	json 47
math 31	validation 48

double /

add 18	buffer 36
byte 7	calculation 14
cast 10	character 5
compare 20	convert 71
divide 8	Format 42
long 21	math 17
money 4	number 31
parse 28	parseDouble 18
precision 30	round 37
subtraction 7	value 1
variable 29

enum /

Annotation 10	c 6
class 39	Compare 11
compile 6	Convert 11
declare 11	element 14
enum 1 100	enum 2 100
enum 3 100	enum 4 12
enumeration 19	EnumSet 6
equal 2	error 18
extend 14	field 8
function 8	instance 8
keyword 7	loop 5
member 5	method 28
nest 11	number 7
object 10	ordinal 7
package 5	Parameter 8
parse 2	Pattern 9
problem 30	Property 6
reference 11	reflection 9
scjp 2	singleton 9
Statement 13	Switch 15
type 31	Usage 6
value 38	valueOf 9
variable 10

float /

accuracy 5	arithmetic 5
audio 2	binary 4
byte 4	c 1
Cast 10	clojure 1
compare 9	convert 67
currency 3	decimalformat 1
divide 7	double 47
error 15	exception 2
float 1 100	float 2 21
floatToIntBits 3	format 16
ieee754 4	image 3
jni 1	literal 2
long 8	math 7
NAN 3	number 30
operator 2	parseFloat 4
precision 17	primitive 9
printf 2	Random 4
round 11	swt 1
union 1	value 27
variable 10

hexadecimal /

ascii 18	Base64 2
binary 9	Color 6
convert 35	Decode 4
encoding 3	Escape 1
format 6	hex 48
hexadecimal 27	RGB 2
syntax 1	Unicode 6
value 23

Integer /

autobox 15	bigdecimal 12
BigInteger 15	binary 23
bit 27	bitwise 15
boolean 26	byte 59
Cast 49	char 67
character 27	compare 43
console 7	convert 1 100
convert 2 53	cryptography 2
decimal 17	digit 21
divide 13	double 74
element 9	enum 17
equal 22	error 20
float 45	format 27
hex 21	input 18
Integer 1 100	Integer 2 100
Integer 3 100	Integer 4 100
Integer 5 85	length 13
literal 15	Long 54
loop 21	math 19
memory 7	negative 16
number 93	odd 6
operator 19	output 14
overflow 12	parameter 15
parse 40	parseint 35
primitive 19	println 6
public 6	random 28
range 13	reverse 12
Round 16	Scanner 13
short 21	sign 27
size 8	Sort 13
split 12	string 1 100
string 2 78	sum 22
swap 4	too large 10
unique 7	validation 12
value 90	valueOf 14
variable 36	wrapper 5
zero 16

Number /

Big number 12	binary 24
calculate 33	Convert 66
Count number 67	factorial number 6
game 24	input number 44
Large Number 28	line number 52
long 30	loop 34
magic 11	maximum 15
negative Number 40	octal 4
Page Number 25	phone number 25
prime number 86	Random Number 1 100
Random Number 2 100	Random Number 3 100
Random Number 4 18	Random 43
read 31	revision 1
sequence 20	Serial Number 18
small 23	Sort 23
sum 29	text 16
unique Number 32	variable 28
version number 15

Number Format /

comma 2	Convert 7
country 2	currency 5
digit 8	local 1
locale 2	localization 1
money 1	Notation 2
number format 1 100	number format 2 22
numberformat 54	NumberFormatException 1 100
NumberFormatException 2 9	numeric 3
Pattern 5	phone 4
Scientific 2	sign 3
validation 4

primitive /

anonymous 3	autobox 7
boxing 3	c 1
Check 6	convert 7
equal 3	field 1
immutable 4	instanceof 2
memory 3	null 5
Parameter 3	primitive 1 100
primitive 2 27	reference 10
reflection 11	sign 3
swap 1	value 15
variable 12	wrapper 5

SimpleDateFormat /

convert 19	date 22
dateformat 13	datetime 12
day 12	dd 1
Format 27	GMT 4
locale 8	month 13
parse 34	pattern 8
PM 4	SimpleDateFormat 94
ss 4	string 15
time 9	timezone 16

string /

append 21	args 51
binary 31	Buffer 51
c 20	case 34
charAt 26	check 1 100
check 2 10	color 31
compare 1 100	compare 2 89
comparision 24	compile 16
concat 27	concatenate 12
concatenation 24	contain 67
convert 1 100	convert 2 55
Count 40	declare 26
decode 11	decrypt 15
difference 41	display 28
drawString 5	empty 25
encode 9	encoding 33
encrypt 24	error 26
Escape 19	expression 24
extract 45	find 70
font 11	html 50
image 10	immutable 71
index 51	indexOf 59
Insert 27	intern 27
japanese 5	jni 4
length 61	letter 35
line 43	List 57
Literal 63	Long 51
loop 71	manipulation 65
match 45	memory 41
MessageFormat 9	newline 10
null 59	operator 24
order 21	padding 15
parse 1 100	parse 2 29
pass 58	Pattern 35
permutation 7	Pool 39
print 45	quote 33
read 39	reflection 18
remove 75	replace 1 100
replace 2 46	replaceAll 64
replaceFirst 10	reverse 63
scanner 30	search 63
sentence 13	size 27
Sort 39	space 83
Split 1 100	Split 2 100
Split 3 100	Split 4 25
stream 1	String 1 100
String 10 100	String 11 100
String 12 100	String 13 100
String 14 100	String 15 100
String 16 100	String 17 100
String 18 100	String 19 100
String 2 100	String 20 100
String 21 17	String 3 100
String 4 100	String 5 100
String 6 100	String 7 100
String 8 100	String 9 100
StringIndexOutOfBoundsException 3	switch 26
text 33	trim 21
unicode 49	utf 2
value 1 100	value 2 14
valueOf 10	variable 65
whitespace 9	word 60

StringBuffer /

append 18	capacity 4
compare 4	concatenation 2
content 2	convert 4
deleteCharAt 1	efficiency 1
end 2	final 2
instance 1	length 1
memory 6	new 4
OutOfMemoryError 2	parse 4
replace 6	setCharAt 1
size 7	start 1
StringBuffer 1 100	StringBuffer 2 95
stringwriter 1	text 3

StringBuilder /

append 5	capacity 2
compare 2	concatenation 5
content 1	efficiency 1
final 1	memory 3
OutOfMemoryError 1	replace 8
StringBuilder 58

StringTokenizer /

delimiter 9	ERROR 6
line 3	nextToken 3
null 4	read 2
Scanner 3	Sort 3
split 17	StringTokenizer 1 100
StringTokenizer 2 100	StringTokenizer 3 17
token 13	word 4

substring /

endIndex 1	error 2
extract 8	find 15
index 4	IndexOf 5
match 6	memory 2
range 5	Replace 16
search 12	split 6
substring 1 100	substring 2 53
word 3

TimeZone /

convert 60	country 2
date 39	datetime 8
daylight savings 6	default 4
dst 13	EST 5
format 12	getDefault 5
getTimeZone 1	gmt 7
GregorianCalendar 4	hour 7
Joda 2	jodatime 9
locale 10	parse 12
PST 4	system 5
Time 16	timestamp 5
TimeZone 1 100	TimeZone 2 2
UTC 5