com.appunite.websocket.tools

Class Strings

java.lang.Object

com.appunite.websocket.tools.Strings

public class Strings
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Strings()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	emptyToNull(java.lang.String string) Returns the given string if it is nonempty; null otherwise.
static boolean	isNullOrEmpty(java.lang.String string) Returns true if the given string is null or is the empty string.
static java.lang.String	nullToEmpty(java.lang.String string) Returns the given string if it is non-null; the empty string otherwise.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Strings

public Strings()

Method Detail

nullToEmpty

public static java.lang.String nullToEmpty(@Nullable
                           java.lang.String string)

Returns the given string if it is non-null; the empty string otherwise.

Parameters:

string - the string to test and possibly return

Returns:

string itself if it is non-null; "" if it is null

emptyToNull

@Nullable
public static java.lang.String emptyToNull(@Nullable
                                    java.lang.String string)

Returns the given string if it is nonempty; null otherwise.

Parameters:

string - the string to test and possibly return

Returns:

string itself if it is nonempty; null if it is empty or null

isNullOrEmpty

public static boolean isNullOrEmpty(@Nullable
                    java.lang.String string)

Returns true if the given string is null or is the empty string.

Consider normalizing your string references with nullToEmpty(java.lang.String). If you do, you can use String.isEmpty() instead of this method, and you won't need special null-safe forms of methods like String.toUpperCase(java.util.Locale) either. Or, if you'd like to normalize "in the other direction," converting empty strings to null, you can use emptyToNull(java.lang.String).

Parameters:

string - a string reference to check

Returns:

true if the string is null or is the empty string