Enthuware

public class StringCreations {
    public static void main(String[] args) {
        String hello = "hello";/*A STRING CREATED HERE*/
        for(int i=0;i<5;i++){
            hello = hello + i;/*OTHER STRING CREATED IN EACH ITERATION.*/
        }
        System.out.println(hello);/*6 or 11 objects created at this time?? i think is 6*/
    }    
}

https://stackoverflow.com/questions/601 ... 1_60137841

https://stackoverflow.com/questions/465 ... -in-java-9

In this case, JLS section 15.18.1 clearly says that a compiler may avoid creating multiple strings altogether by making use of a StringBuffer. Thus, it is not possible to tell how many Strings will be created and how many will be eligible to be garbage collected.

Don’t worry, you will not get questions in the exam about garbage collection of Strings. I have talked about it here only to make you aware of the issue. Strings muddle the topic of garbage collection so much so that it is a bad idea to use them while explaining garbage collection.

An implementation may choose to perform conversion and concatenation in one step to avoid creating and then discarding an intermediate String object. To increase the performance of repeated string concatenation, a Java compiler may use the StringBuffer class or a similar technique to reduce the number of intermediate String objects that are created by evaluation of an expression.