[HD-OCP17/21-Fundamentals Pg 265, Sec. 11.1.6 - manipulating-strings]

[raphaelzintec]

Furthermore, any method that attempts to access an index that is beyond the range of this array throws IndexOutOfBoundsException.

so basically all String methods throw IndexOutOfBoundsException except substring() which throws StringIndexOutOfBoundsException ?

[admin]

For most of the methods (that throw IOOBE) of the String class, the JavaDoc say these methods throws IOOBE but the implementation of some of these methods (including substring) throw SIOOBE. Since SIOOBE extends IOOBE, the implementation is technically within the agreed contract.

The JavaDoc for indexOf method says it throws SIOOBE.

[dtruebin]

21st Jun 2025 Build 2.20: the summary table at the beginning of the section mentions method firstIndexOf which exists neither in Java 17's nor in Java 21's String.

[dtruebin]

21st Jun 2025 Build 2.20:

Code: Select all

//the following lines print false
System.out.println(s1.indent(0) == s1); //prints false even though there is no change

-- "there is no change" is clearly wrong, as demonstrated by the following JShell snippet:

Code: Select all

jshell> "a".stripIndent()
$86 ==> "a"

Even in the book itself, this is supported by this sentence a couple of paragraphs earlier:

More interestingly, if the last line is not terminated using a line terminator, a \n character is appended.

[admin]

21st Jun 2025 Build 2.20: the summary table at the beginning of the section mentions method firstIndexOf which exists neither in Java 17's nor in Java 21's String.

Correct. indexOf is actually returns the first index so there is no need for firstIndexOf. There is just lastIndexOf.

[admin]

21st Jun 2025 Build 2.20:

Code: Select all

//the following lines print false
System.out.println(s1.indent(0) == s1); //prints false even though there is no change

-- "there is no change" is clearly wrong, as demonstrated by the following JShell snippet:

Code: Select all

jshell> "a".stripIndent()
$86 ==> "a"

Even in the book itself, this is supported by this sentence a couple of paragraphs earlier:

More interestingly, if the last line is not terminated using a line terminator, a \n character is appended.

You are right.s1.indent(0) adds a new line character and so false is expected. Although "a".stripIndent() produces a different string with the same content.

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