THE PACKAGE JAVA.LANG

java.lang.Character

20.5

20.5.12

public static boolean isUpperCase(char ch)

The result is

true

 if and only if the character argument is an uppercase character.

A character is considered to be uppercase if and only if all of the following are

true:

The character

ch

 is not in the range

\u2000

 through

\u2FFF

.

The Unicode attribute table does not specify a mapping to uppercase for this

character (the purpose of this requirement is to exclude titlecase characters).

At least one of the following is true:

N

The Unicode attribute table specifies a mapping to lowercase for this char 

acter.

N

The name for the character in the Unicode attribute table contains the words

CAPITAL LETTER

 or the words

CAPITAL LIGATURE

.

It follows, then, that for Unicode 1.1.5 as corrected above, the uppercase Uni 

code characters are exactly those with codes in the following list, which contains

both single codes and inclusive ranges:

 0041

005A

,

00C0

00D6

,

00D8

00DE

,

0100

0136

(evens only),

0139

0147

(odds only),

014A

0178

(evens only),

0179

017D

(odds only),

0181

0182

,

0184

,

0186

,

0187

,

0189

018B

,

018E

0191

,

0193

0194

,

0196

0198

,

019C

019D

,

019F

01A0

,

01A2

,

01A4

,

01A7

,

01A9

,

01AC

,

01AE

,

01AF

,

01B1

01B3

,

01B5

,

01B7

,

01B8

,

01BC

,

01C4

,

01C7

,

01CA

,

01CD

01DB

 (odds

only),

01DE

01EE

(evens only),

01F1

,

01F4

,

01FA

0216

(evens only),

0386

,

0388

038A

,

038C

,

038E

,

038F

,

0391

03A1

,

03A3

03AB

,

03E2

03EE

(evens only),

0401

040C

,

040E

042F

,

0460

0480

(evens only),

0490

04BE

 (evens only),

04C1

,

04C3

,

04C7

,

04CB

,

04D0

04EA

(evens only),

04EE

04F4

(evens only),

04F8

,

0531

0556

,

10A0

10C5

,

1E00

1E94

(evens only),

1EA0

1EF8

(evens

only),

1F08

1F0F

,

1F18

1F1D

,

1F28

1F2F

,

1F38

1F3F

,

1F48

1F4D

,

1F59

1F5F

(odds only),

1F68

1F6F

,

1F88

1F8F

,

1F98

1F9F

,

1FA8

1FAF

,

1FB8

1FBC

,

1FC8

1FCC

,

1FD8

1FDB

,

1FE8

1FEC

,

1FF8

1FFC

,

FF21

FF3A

.

Of the first 128 Unicode characters, exactly 26 are considered to be upper 

case:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

[This specification for the method

isUpperCase

 is scheduled for introduction

in Java version 1.1, either as defined here, or updated for Unicode 2.0; see  20.5.

In previous versions of Java, this method returns

false

 for all arguments larger

than

\u00FF

.]

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