JDK5.0的11个主要新特征_JAVA开发_学习笔记★闵涛★计算机学习电脑编程软硬件技巧


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JDK5.0的11个主要新特征

作者：闵涛文章来源：闵涛的学习笔记点击数：2050 更新时间：2009/4/22 23:33:14

e, no seconds
18:05

Y
Four-digit year (with leading zeroes)
2004

y
Last two digits of the year (with leading zeroes)
04

C
First two digits of the year (with leading zeroes)
20

B
Full month name
February

b or h
Abbreviated month name
Feb

m
Two-digit month (with leading zeroes)
02

d
Two-digit day (with leading zeroes)
09

e
Two-digit day (without leading zeroes)
9

A
Full weekday name
Monday

a
Abbreviated weekday name
Mon

j
Three-digit day of year (with leading zeroes), between 001 and 366
069

H
Two-digit hour (with leading zeroes), between 00 and 23
18

k
Two-digit hour (without leading zeroes), between 0 and 23
18

I
Two-digit hour (with leading zeroes), between 01 and 12
06

l
Two-digit hour (without leading zeroes), between 1 and 12
6

M
Two-digit minutes (with leading zeroes)
05

S
Two-digit seconds (with leading zeroes)
19

L
Three-digit milliseconds (with leading zeroes)
047

N
Nine-digit nanoseconds (with leading zeroes)
047000000

P
Uppercase morning or afternoon marker
PM

p
Lowercase morning or afternoon marker
pm

z
RFC 822 numeric offset from GMT
-0800

Z
Time zone
PST

s
Seconds since 1970-01-01 00:00:00 GMT
1078884319

E
Milliseconds since 1970-01-01 00:00:00 GMT
1078884319047

Table 3-6. Flags for printf

Flag
Purpose
Example

+
Prints sign for positive and negative numbers
+3333.33

space
Adds a space before positive numbers
| 3333.33|

0
Adds leading zeroes
003333.33

-
Left-justifies field
|3333.33 |

(
Encloses negative number in parentheses
(3333.33)

,
Adds group separators
3,333.33

# (for f format)
Always includes a decimal point
3,333.

# (for x or o format)
Adds 0x or 0 prefix
0xcafe

^
Converts to upper case
0XCAFE

$
Specifies the index of the argument to be formatted; for example, %1$d %1$x prints the first argument in decimal and hexadecimal
159 9F

<
Formats the same value as the previous specification; for example, %d %

　　这里是一些简单的介绍，更详细的说明请参考：

　　Core Java 2 Volume I - Fundamentals, Seventh Edition

　　Core Java 2 Volume II - Advanced Features, Seventh Edition

　　里面都有一些很精彩的描述，中文名称就是《Java核心技术》。只有第七版才有J2SE5.0的介绍，但是第七版好像还没有中文版。本文还参考了Professional Java JDK - 5th Edition.

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