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ShutdownHook

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ShutdownHook

ShutdownHook — state the definition in one sentence. For ShutdownHook, know the key keywords / API types involved.

Be ready with one tiny runnable ShutdownHook example.

Mention one common ShutdownHook mistake and the fix.

Write one tiny example for ShutdownHook. Compile, print one result, and say the output out loud before you type.

Use ShutdownHook only when the problem needs it. Don’t force it into every program. Know one beginner trap.

Let's take this on the board with one tiny Main class — no extra files. Output: Asha scored 72 then Pass. Real Main. Swap marks/name to show one idea from ShutdownHook. Start from main, go line by line, and stop at each print. That output is the proof for ShutdownHook.

Exam tip

Explain ShutdownHook as: definition → why → one code idea.

Example

// ShutdownHook
public class Main {
  public static void main(String[] args) {
    int marks = 72;
    String name = "Asha";
    System.out.println(name + " scored " + marks);
    if (marks >= 40) System.out.println("Pass");
  }
}

Output: Asha scored 72 then Pass. Real Main. Swap marks/name to show one idea from ShutdownHook.

Short notes

DefShutdownHook is a Java idea you should explain with one small example.
RuleKnow the keyword / API used for ShutdownHook. Type a tiny Main and print one result.
RememberFor ShutdownHook, say the output before you code.
TrapShutdownHook — only memorising the heading. No example, no trap.
Define ShutdownHook
Key keyword / API

// ShutdownHook public class Main { public static void main(String[] args) { int marks = 72; String name = "Asha"; System.out.println(name + " scored " + marks); if (marks >= 40) System.out.println("Pass"); } }

ShutdownHook

Example

Short notes

Questions

ShutdownHook

Example

Short notes

Questions