What happens when using the syntax String s1 = "asd"?

When using the syntax String s1 = "asd";:

1. String Pool: The JVM checks the string pool for the presence of the string literal "asd". The string pool is a special area in the heap where unique string literals are stored to save memory.
2. Object creation:
   • If "asd" already exists in the pool, the variable s1 will simply reference this existing object in the pool.
   • If "asd" does not exist, the JVM creates a new String object in the string pool with the value "asd".
3. Reference assignment: The variable s1 gets a reference to the String object in the string pool.

Unlike String s2 = new String("asd");, when using a literal, the object can be reused by other references pointing to the same literal, leading to memory optimization.