Difference between "char" and "String" in Java

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.)

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 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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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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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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Comments
  • docs.oracle.com/javase/tutorial/java/nutsandbolts/…
  • @MartinJames - I wonder if you'd make a similar statement towards JavaScript nowadays...
  • A character constant has an equivalent integer value, whereas a single-character string constant does not have an equivalent integer value.
  • You can also compare a char whith int : in ASCII table number give you the symbol to print.
  • A char does not contain an entire aphabet.
  • No, you can't say that. A Java char is 16 bits, and a String is a collection of char. Java uses UTF-16 internally, not ASCII. This is rather basic.