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org.apache.derby.iapi.util
Class StringUtil
java.lang.Objectorg.apache.derby.iapi.util.StringUtil
- public class StringUtil
- extends java.lang.Object
A set of public static methods for dealing with Strings
| Field Summary | |
private static char[] |
hex_table
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| Constructor Summary | |
StringUtil()
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| Method Summary | |
static java.lang.String |
formatForPrint(java.lang.String input)
Used to print out a string for error messages, chops is off at 60 chars for historical reasons. |
static byte[] |
fromHexString(java.lang.String s,
int offset,
int length)
Convert a hexidecimal string generated by toHexString() back into a byte array. |
static byte[] |
getAsciiBytes(java.lang.String input)
Get 7-bit ASCII character array from input String. |
static java.lang.String |
hexDump(byte[] data)
Convert a byte array to a human-readable String for debugging purposes. |
static boolean |
SQLEqualsIgnoreCase(java.lang.String s1,
java.lang.String s2)
Compares two strings Strings will be uppercased in english and compared equivalent to s1.equalsIgnoreCase(s2) throws NPE if s1 is null |
static java.lang.String |
SQLToLowerCase(java.lang.String s)
Convert string to lowercase Return java.util.Locale.ENGLISH lowercasing |
static java.lang.String |
SQLToUpperCase(java.lang.String s)
Convert string to uppercase Always use the java.util.ENGLISH locale |
static java.lang.String |
toHexString(byte[] data,
int offset,
int length)
Convert a byte array to a String with a hexidecimal format. |
static java.lang.String[] |
toStringArray(java.lang.Object[] objArray)
A method that receive an array of Objects and return a String array representation of that array. |
static java.lang.String |
trimTrailing(java.lang.String str)
Trim off trailing blanks but not leading blanks |
static java.lang.String |
truncate(java.lang.String value,
int length)
Truncate a String to the given length with no warnings or error raised if it is bigger. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
hex_table
private static char[] hex_table
| Constructor Detail |
StringUtil
public StringUtil()
| Method Detail |
formatForPrint
public static final java.lang.String formatForPrint(java.lang.String input)
- Used to print out a string for error messages,
chops is off at 60 chars for historical reasons.
toStringArray
public static java.lang.String[] toStringArray(java.lang.Object[] objArray)
- A method that receive an array of Objects and return a
String array representation of that array.
getAsciiBytes
public static byte[] getAsciiBytes(java.lang.String input)
- Get 7-bit ASCII character array from input String.
The lower 7 bits of each character in the input string is assumed to be
the ASCII character value.
Hexadecimal - Character
| 00 NUL| 01 SOH| 02 STX| 03 ETX| 04 EOT| 05 ENQ| 06 ACK| 07 BEL|
| 08 BS | 09 HT | 0A NL | 0B VT | 0C NP | 0D CR | 0E SO | 0F SI |
| 10 DLE| 11 DC1| 12 DC2| 13 DC3| 14 DC4| 15 NAK| 16 SYN| 17 ETB|
| 18 CAN| 19 EM | 1A SUB| 1B ESC| 1C FS | 1D GS | 1E RS | 1F US |
| 20 SP | 21 ! | 22 " | 23 # | 24 $ | 25 % | 26 & | 27 ' |
| 28 ( | 29 ) | 2A * | 2B + | 2C , | 2D - | 2E . | 2F / |
| 30 0 | 31 1 | 32 2 | 33 3 | 34 4 | 35 5 | 36 6 | 37 7 |
| 38 8 | 39 9 | 3A : | 3B ; | 3C < | 3D = | 3E > | 3F ? |
| 40 @ | 41 A | 42 B | 43 C | 44 D | 45 E | 46 F | 47 G |
| 48 H | 49 I | 4A J | 4B K | 4C L | 4D M | 4E N | 4F O |
| 50 P | 51 Q | 52 R | 53 S | 54 T | 55 U | 56 V | 57 W |
| 58 X | 59 Y | 5A Z | 5B [ | 5C \ | 5D ] | 5E ^ | 5F _ |
| 60 ` | 61 a | 62 b | 63 c | 64 d | 65 e | 66 f | 67 g |
| 68 h | 69 i | 6A j | 6B k | 6C l | 6D m | 6E n | 6F o |
| 70 p | 71 q | 72 r | 73 s | 74 t | 75 u | 76 v | 77 w |
| 78 x | 79 y | 7A z | 7B { | 7C | | 7D } | 7E ~ | 7F DEL|
trimTrailing
public static java.lang.String trimTrailing(java.lang.String str)
- Trim off trailing blanks but not leading blanks
truncate
public static java.lang.String truncate(java.lang.String value, int length)
- Truncate a String to the given length with no warnings
or error raised if it is bigger.
toHexString
public static java.lang.String toHexString(byte[] data, int offset, int length)
- Convert a byte array to a String with a hexidecimal format.
The String may be converted back to a byte array using fromHexString.
For each byte (b) two characaters are generated, the first character represents the high nibble (4 bits) in hexidecimal (b & 0xf0), the second character represents the low nibble (b & 0x0f).
The byte atdata[offset]is represented by the first two characters in the returned String.
fromHexString
public static byte[] fromHexString(java.lang.String s, int offset, int length)
- Convert a hexidecimal string generated by toHexString() back
into a byte array.
hexDump
public static java.lang.String hexDump(byte[] data)
- Convert a byte array to a human-readable String for debugging purposes.
SQLToUpperCase
public static java.lang.String SQLToUpperCase(java.lang.String s)
- Convert string to uppercase
Always use the java.util.ENGLISH locale
SQLToLowerCase
public static java.lang.String SQLToLowerCase(java.lang.String s)
- Convert string to lowercase
Return java.util.Locale.ENGLISH lowercasing
SQLEqualsIgnoreCase
public static boolean SQLEqualsIgnoreCase(java.lang.String s1, java.lang.String s2)
- Compares two strings
Strings will be uppercased in english and compared
equivalent to s1.equalsIgnoreCase(s2)
throws NPE if s1 is null
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DETAIL: FIELD | CONSTR | METHOD | ||||||||