In String class of java, there is a variable defined as below:
private final int offset;
What does this offset hold?
-
The answer is in the very source file containing this variable.xlecoustillier– xlecoustillier2015-07-22 13:44:26 +00:00Commented Jul 22, 2015 at 13:44
-
Upgrade your Java version.Sotirios Delimanolis– Sotirios Delimanolis2015-07-22 13:53:32 +00:00Commented Jul 22, 2015 at 13:53
Add a comment
|
3 Answers
From comment of variable offset:
The offset is the first index of the storage that is used.
Internally a String is represented as a sequence of chars in an array.
This is the first char to use from the array.
It has been introducted because some operations like substring create a new String using the original char array using a different offset.
So basically is a variable introduced for a performance tuning for substring operations.
Note: the offset variable is always with the variable private final int count;
answered Jul 22, 2015 at 13:41
Davide Lorenzo MARINO
27k4 gold badges45 silver badges58 bronze badges
Comments
Form the source code:
The offset is the first index of the storage that is used.
Comments
From String.java:
The offset is the first index of the storage that is used.
/** The value is used for character storage. */
private final char value[];
/** The offset is the first index of the storage that is used. */
private final int offset;
You can see it being used in various methods such as:
public char charAt(int index) {
// ...
return value[index + offset];
}
