What is String pool in Java?
java
Solution
This prints `true` (even though we don't use `equals` method: correct way to compare strings)
String s = "a" + "bc";
String t = "ab" + "c";
System.out.println(s == t);
When compiler optimizes your string literals, it sees that both `s` and `t` have same value and thus you need only one string object. It's safe because `String` is immutable in Java. As result, both `s` and `t` point to the same object and some little memory saved.
Name 'string pool' comes from the idea that all already defined string are stored in some 'pool' and before creating new `String` object compiler checks if such string is already defined.
Problem
I am confused about StringPool in Java. I came across this while reading the String chapter in Java. Please help me understand, in layman terms, what StringPool actually does.