Difference between char and String in Java

Question

I am reading a book for Java that I am trying to learn  and I have a question  I can t understand what is the difference between the variable type char and String  For example  there is a difference between int and short  the bytes at the memory and the area of numbers that they have   But what is the difference between char and String  except that char use     and  String        PS  It is my first  real  programming language   At school I learned a fake-language for the purpose of the programming lesson

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A char holds a single character  while a string holds lots of characters

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A character is anything that you can type such as letters digits punctuations and spaces                                                     Strings appears in variables i e they are text items in perls                  A character consist of 16bits        While the lenght of a string is unlimited

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Well  char  or its wrapper class Character  means a single character  i e  you can t write  ab  whereas String is a text consisting of a number of characters and you can think of a string a an array of characters  in fact the String class has a member char   value    You could work with plain char arrays but that s quite tedious and thus the String class is there to provide a convenient way for working with texts

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char is one character  String is zero or more characters   char is a primitive type  String is a class   char c    a   String s    Hi      Note the single quotes for char  and double quotes for String

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char have any but one character  letters  numbers       char example    x     string can have zero characters or as many as you want  String example    Here you can have anything

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In layman s term  char is a letter  while String is a collection of letter  or a word   The distinction of   and   is important  as  Test  is illegal in Java   char is a primitive type  String is a class

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A char simply contains a single alphabet and a string has a full word or number of words woth having a escape sequence inserted in the end automatically to tell the compiler that string has been ended here  0

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char means single character  In java it is UTF-16 character  String can be thought as an array of chars   So  imagine  Android  string  It consists of  A    n    d    r    o    i  and again  d  characters   char is a primitive type in java and String is a class  which encapsulates array of chars

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I would recommend you to read through the Java tutorial documentation hosted on Oracle s website whenever you are in doubt about anything related to Java   You can get a clear understanding of the concepts by going through the following tutorials    Characters Strings

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A char consists of a single character and should be specified in single quotes  It can contain an alphabetic  numerical or even special character  below are a few examples   char a    4   char b        char c    B     A String defines a line can be used which is specified in double quotes  Below are a few examples   String a    Hello World   String b    1234   String c

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char is a primitive type  and it can hold a single character  String is instead a reference type  thus a full-blown object

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In string we can store multiple char  e g  char ch  a    String s  a     String s1  aaaa

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char is a primitive type  and it can hold a single character    String is instead a reference type  thus a full-blown object  It can hold any number of characters  internally  String objects save them in a char array    Primitive types in Java have advantages in term of speed and memory footprint  But they are not real objects  so there are some possibilities you lose using them  They cannot be used as Generic type parameters  they could not have methods or fields  and so on   However  every Java primitive type has a corresponding full-blown object  and the conversion between them is done automagically by the compiler  this is called autoboxing    You can for example do   int i 12  Integer l i    The compiler takes care of converting the int to a Integer

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Char is a single alphabet where as String is a sequence of characters  Char is primitive datatype where as String is a class

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In terms of ASCII values you can say char is a single ASCII value ranging from 0-255  Whereas String is a collection of ASCII values  Try this code to learn better           char c  a           String s  a b c d e f g hijkl           int i c          System out println i           for int count 0 count lt s length   count                 int temp s charAt count               System out print temp                   The output will be   97  97 32 98 32 99 32 100 32 101 32 102 32 103 32 104 105 106 107 108   Since 97 is the ASCII value for small  a   32 is the ASCII value for space  Hope this helps in-depth understanding of the concept

[java] Difference between "char" and "String" in Java

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