string literal in Java

String literals must be surrounded by double quotes.
String literals are used from the string pool. This means that strings with same values refer to the same object and are equal.
```
public class C {
    public static void main(String[] main) {
        String s1 = "Java";
        String s2 = "Java";
        System.out.println(s1 == s2); // true
        System.out.println(s1.equals(s2)); // true
    } 
}
```