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String: cannot be modified once initialization of the strings object

String s = "abc"= "NBA"; System.out.println (s); // The result is "NBA" /* here is actually created two objects, one is "abc", One is "NBA", change is the direction of S. In memory "ABC" still exists */= "abc"; // "ABC" that was created before pointing to S. /* with string variable name = "string"; to initialize, the string is stored in a constant pool, each time initialization, go to the constant pool, find out the variable directly to the string, did not find re-created, this is the string s = new String ("..."); Because the latter creates a new object directly in the heap memory * /

Related knowledge of string