public final class TextUtils extends Object
| Modifier and Type | Method and Description |
|---|---|
static byte |
castAsByte(int c)
Casts character to byte filtering non-visible and non-ASCII characters before conversion.
|
static boolean |
containsBlanks(CharSequence s)
Tests whether a CharSequence contains any whitespace.
|
static boolean |
isAllASCII(CharSequence s)
Determines whether the given
CharSequence contains only ASCII characters. |
static boolean |
isBlank(CharSequence s)
Checks if a CharSequence is empty (""), null or whitespace only.
|
static boolean |
isEmpty(CharSequence s)
Tests whether the parameter is null or of zero length.
|
static int |
length(CharSequence cs)
Gets a CharSequence length or
0 if the CharSequence is
null. |
static String |
toHexString(byte[] bytes)
Returns a hexadecimal string with lowercase letters, representing the
values of the
bytes. |
static String |
toLowerCase(String s)
Converts a String to its lower case representation using
Locale.ROOT. |
public static boolean isEmpty(CharSequence s)
s - The CharSequence to test.public static boolean isBlank(CharSequence s)
Checks if a CharSequence is empty (""), null or whitespace only.
Whitespace is defined by Character.isWhitespace(char).
TextUtils.isBlank(null) = true
TextUtils.isBlank("") = true
TextUtils.isBlank(" ") = true
TextUtils.isBlank("abg") = false
TextUtils.isBlank(" abg ") = false
s - the CharSequence to check, may be nulltrue if the CharSequence is null, empty or whitespace onlypublic static int length(CharSequence cs)
0 if the CharSequence is
null.cs - a CharSequence or null0 if the CharSequence is
null.public static boolean containsBlanks(CharSequence s)
s - The CharSequence to test.public static String toHexString(byte[] bytes)
bytes.bytes - whose hex string should be createdpublic static String toLowerCase(String s)
Locale.ROOT.s - The String to convertpublic static boolean isAllASCII(CharSequence s)
CharSequence contains only ASCII characters.s - the CharSequence to checkCharSequence contains only ASCII characters, false otherwiseIllegalArgumentException - if the input CharSequence is null@Internal public static byte castAsByte(int c)
c - The character to cast.'?'.Copyright © 2005–2021 The Apache Software Foundation. All rights reserved.