Skip to content

added a parsons problem to section 8.3 #415

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
pearcej merged 1 commit into from
Aug 12, 2026
Merged

added a parsons problem to section 8.3 #415

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
38 changes: 38 additions & 0 deletions source/ch8_filehandling.ptx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -287,6 +287,44 @@ public class CreateFile {
<p>
You may have noticed that there are some new methods you haven't seen yet. The <c>hasNextLine()</c> method checks if there is a next line in the file, and returns <c>false</c> if there isn't. This method allows us to iterate over every line till there is no next line. The <c>nextLine()</c> method of the Scanner object returns the next line in the file as a string.
</p>

<exercise xml:id="java-read-file-parsons-exercise" label="java-read-file-parsons">
<statement>
<p>
Construct the part of a Java program that opens a file with a <c>Scanner</c> and
prints each line until there are no more lines. Drag the blocks into the correct order on the right.
</p>
</statement>
<blocks>
<block order="1">
<choice correct="yes">
<cline>try (Scanner fileReader = new Scanner(new File(filename))) {</cline>
</choice>
<choice correct="no">
<cline>try (Scanner fileReader = new Scanner(filename)) {</cline>
</choice>
</block>

<block order="2">
<choice correct="yes">
<cline> while (fileReader.hasNextLine()) {</cline>
</choice>
<choice correct="no">
<cline> while (fileReader.nextLine()) {</cline>
</choice>
</block>

<block order="3">
<cline> String data = fileReader.nextLine();</cline>
<cline> System.out.println(data);</cline>
</block>

<block order="4">
<cline> }</cline>
<cline>}</cline>
</block>
</blocks>
</exercise>
</section>

<section xml:id="writing-to-files">
Expand Down