Question 275 of 513
1Z0-829 Java Platform Overview and Packaging Practice Question
A developer wants to create an executable JAR file. Which jar command option is used to specify the main class?
⚠ Common exam trap
It's easy for candidates to confuse `--main-class` with `--class-path` or think `--create` alone makes the JAR executable, but `--create` only builds the archive without setting an entry point.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
--main-class
The `--main-class` option (or `-e` in older syntax) specifies the fully qualified name of the class containing the `public static void main(String[])` method when creating an executable JAR with the `jar` command. This entry is stored in the JAR's `META-INF/MANIFEST.MF` file under the `Main-Class` header, which the Java launcher reads to determine the entry point.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
--main-class
Why this is correct
--main-class specifies the main class for an executable JAR.
- ✗
--class-path
Why it's wrong here
--class-path sets the class path for the JAR, not the main class.
- ✗
--module-version
Why it's wrong here
--module-version sets the module version, not the main class.
- ✗
--create
Why it's wrong here
--create is used to create a new JAR file, not set the main class.
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Last reviewed: Jun 25, 2026
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