1.String constant address value:
2.
API midst, and said: All string literals (such as "abc") Java program as an instance of this class are realized.
In fact, that is: the program among all double-quoted strings, is an object of the String class. (Even if not new, it still yes.)
3.
Features of the string:
Contents 1. Never string variable. [Emphasis]
2. It is precisely because the string can not be changed, so the strings can be shared use.
3. The effect is equivalent to a string char [] array of characters, but the underlying principle is the byte [] array of bytes.
Note: Direct write double quotes is the string object.
4. Create a common 3 + 1 Ways string.
Method three configurations:
public String (): Create a blank string does not contain any content.
public String (char [] array): The contents of the character array to create the corresponding character string.
public String (byte [] array): The contents of the byte array to create the corresponding character string.
String str = "Hello"; // use double quotation marks directly on the right
