No clone method in String Class

Question

A technical aptitude question

HashMap map = new HashMap();
String key1 = \"key1\";
map.put(key1, \"value1\");
Stri         


        

Answer 1

String is an immutable object, so it needn't a clone method since the client code can't change its state inside the String class.

you can just ref to the original String, for example:

String key2 = key1;// or using key1 directly instead.

Answer 2

As has been pointed out already, there is no need to clone immutable objects like String.

But if you decide you really need a distinct instance of the string (and you nearly certainly don't), you can use the copy constructor:

String copy = new String(original);

System.out.println(copy.equals(original)); // true
System.out.println(copy == original); // false