Question

    String a = "test";
    String b = a;

    a = "wuut";

    System.out.println(b);

Prints out test

Shouldn’t b hold refence of a, not just take its value?

Doesn’t Java work that way with objects and stuff?

Answer 1

When a is created lets say it point to place memory_1 in memory.

When b is assigned to a, then b also points to the same memory_1 location.

Now, when a changes value (and because the String Object is immutable) a new value is created now in memory and now a points in memory_2.

But hey, b still points in memory_1.

PS: Immutability is:

In object-oriented and functional programming, an immutable object is an object whose state cannot be modified after it is created.