Mis on stringi literaalide virn ja milleks see mälu haldamisel vajalik on?

The String Pool is a special area of memory in Java where unique string objects are stored. When a string literal is created, the JVM checks if it already exists in the pool. If it does, it returns a reference to it; if not, it adds a new one.

Why is this needed?

• Memory saving: identical strings are stored only once.
• Performance improvement: string comparison via reference (==) is possible for literals from the pool.

Example:

String s1 = "hello";
String s2 = "hello";
System.out.println(s1 == s2); // true, both references point to the same object in the pool

String s3 = new String("hello");
System.out.println(s1 == s3); // false, s3 is a new object outside the pool

Thus, the string pool helps efficiently manage memory when working with strings.