Difference between "char" and "String" in Java

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.

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.