Class StringUtils

java.lang.Object

io.opentelemetry.api.internal.StringUtils

@Immutable
public final class StringUtils
extends Object

Utilities for working with strings.

This class is internal and is hence not for public use. Its APIs are unstable and can change at any time.

Method Summary

Modifier and Type	Method	Description
static boolean	isNullOrEmpty(String string)	Returns true if the given string is null or is the empty string.
static boolean	isPrintableString(String str)	Determines whether the String contains only printable characters.
static String	padLeft(String value, int minLength)	Pads a given string on the left with leading 0's up the length.

Methods inherited from class Object

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

Method Details

isNullOrEmpty

@Contract("null -> true")
public static boolean isNullOrEmpty(@Nullable
 String string)

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

This method was copied verbatim from Guava library method com.google.common.base.Strings#isNullOrEmpty(java.lang.String).

Parameters:

string - a string reference to check

Returns:

true if the string is null or is the empty string

padLeft

public static String padLeft(String value,
 int minLength)

Pads a given string on the left with leading 0's up the length.

Parameters:

value - the string to pad

minLength - the minimum length the resulting padded string must have. Can be zero or negative, in which case the input string is always returned.

Returns:

the padded string

isPrintableString

public static boolean isPrintableString(String str)

Determines whether the String contains only printable characters.

Parameters:

str - the String to be validated.

Returns:

whether the String contains only printable characters.