Update for Java 25#246
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Added Java 21 and 25 material (the 21 is also in an another MR)
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Pull request overview
Updates the Java certification overview page for the newly released Java 25 exam (1Z0-831), incorporating prior changes from devjava-content PR #202 that brought it up to Java 21 parity. The page now lists Java 25 and Java 21 exams, refreshes objectives to the Java 25 syllabus, and adds separate "How to study" sections for Java 25 and Java 21.
Changes:
- Add Java 25 (1Z0-831) and Java 21 (1Z0-830) certification entries and update the "should I wait" section to be version-agnostic.
- Replace Java 17 objectives/sub-objectives with the Java 25 ones.
- Split study guidance into separate Java 25 and Java 21 sections, updating links and book references.
Comments suppressed due to low confidence (3)
app/pages/learn/01_tutorial/08_more-resources/01_java-certification-overview.md:36
- This bullet (Java 21 exam) also claims to be "the most recent certification exam available" — which contradicts the line above describing the Java 25 exam as the most recent. Also contains a stray
=before "the most recent". Only one entry can be "the most recent"; this description likely needs to be updated (e.g., "the prior LTS exam").
1. [1Z0-830: Java SE 21 Developer Professional exam](https://mylearn.oracle.com/ou/exam/java-se-21-developer-professional-1z0-830/105037/139080/220555) - 50 questions in 120 minutes, passing 68% - For Java 21; =the most recent certification exam available.
app/pages/learn/01_tutorial/08_more-resources/01_java-certification-overview.md:37
- The Java 17 exam description still reads "This Java 17 is the most recent certification exams available." This is now incorrect (Java 25 and 21 exams are newer) and should be updated for consistency with the new exams added above.
1. [1Z0-829: Java SE 17 Developer exam](https://education.oracle.com/java-ee-7-application-developer/pexam_1Z0-829) - 50 questions, passing 68% - This Java 17 is the most recent certification exams available.
app/pages/learn/01_tutorial/08_more-resources/01_java-certification-overview.md:71
- Minor grammar: "will give your more details" should be "will give you more details". This line is not part of the diff but appears immediately adjacent — leaving as-is is acceptable; flagging only if you touch it.
Your study materials will give your more details on what you specifically need to know. They will also teach you what you need to learn, point out tricks and practice questions. You should also write lots of code. It's like math; you learn better by doing as you learn!
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Updated for Java 25. Note that this MR includes the relevant changes from #202 which was merged in on the public site but not this repo.
Also note that the Java 25 exam is very new so I will have another update when books are available. In fact, it is so new that it isn't even listed on https://www.oracle.com/education/certification/ yet!