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Remove Whitespace from the Beginning and End of a String

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The trim() method returns a new String with the leading and trailing whitespace removed. 

String s = new String("   Hello World!!  ");
String t = s.trim();  // t = "Hello World!!"

If you trim a String that doesn’t have any whitespace to remove, you will be returned the same String instance.

Note that the trim() method has its own notion of whitespace, which differs from the notion used by the Character.isWhitespace() method:

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Strings:
* Strings
* Comparing Strings
* Changing the case of characters within a String
* Finding a String Within Another String
* String pool and heap storage
* Splitting Strings
* Joining Strings with a delimiter
* String concatenation and StringBuilders
* Platform independent new line separator
* Substrings
* Converting String to other datatypes.
* Reversing Strings
* Adding toString method for custom objects
* Remove Whitespace from the Beginning and End of a String
* Case insensitive switch
* Replacing parts of Strings
* Base64 Encoding Decoding
* Conversion to from bytes
* Getting the nth character in a String
* Getting the length of a String
* Counting occurrences of a substring or character in a string
* Converting other datatypes to String
* Getting a String from an InputStream
* Parsing Strings to a Numerical Value
Table Of Contents
0 Inheritance
1 Getting started with Java
2 Streams
3 Exceptions
4 Collections
5 Lambda Expressions
6 Generics
7 File I/O
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11 Strings
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13 Default Methods
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15 Basic Control structures
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90 XML XPath Evaluation
91 Performance Tuning
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93 Common Pitfalls
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104 FTP File Transfer Protocol
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118 Pitfalls - threads and concurrency
119 Splitting a string into fixed length parts
120 Pitfalls - nulls and NullPointerException
121 SecurityManager
122 JNDI
123 super keyword
124 java.util.Objects class
125 Java command: java and javaw
126 Atomic types
127 Floating Point Operations
128 Converting to and from strings
129 sun.misc.Unsafe
130 Java Memory Model
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137 Java Virtual Machine JVM
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142 Java SE 8 Features
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146 Concurrent Collections
147 Using ThreadPoolExecutor in multi-threaded applications
148 Java Editions, versions, releases and distributions
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152 Generating Java Code
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169 Local Inner class
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171 Immutable class
172 String Tokenizer
173 File upload to S3 / AWS
174 Readers and writers
175 Hashtable
176 Enum starting with a number
177 SortedMap
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180 StringBuffer
181 Choosing Collections
182 C++ Comparison
183 CompletableFuture
184 Contributors