I Asked ChatGPT to Be My Java Mentor — These 30 Prompts Changed Everything

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1. Introduction

• Hook: Start with something relatable — how ChatGPT has become a secret coding buddy for developers.
• Example:
• “Remember those endless Stack Overflow searches for that one missing semicolon? ChatGPT can save hours if you just ask it the right way. Here are my best prompts for Java and Spring Boot developers that actually work.”
• Briefly explain what makes a good prompt (clear intent, context, and desired output format).’

2. Prompts for Java Developers

a. Code Explanation & Debugging

• “Explain this Java code like I’m a junior developer:”

public class OptionalExample {
    public static void main(String[] args) {
        Optional<String> name = Optional.ofNullable(null);
        System.out.println(name.orElse("Guest"));
    }
}

• “Find potential null pointer risks in this code and suggest fixes: [paste code]”
• “Explain what happens in the JVM memory when this method is executed: [paste method]”

b. Code Optimization