[Solved] Examine this Spring Boot controller method:public ResponseEntity getStatus() { return ResponseEntity.ok() .body("Success") .header("X-Status", "OK"); }What is the issue with this code? | Spring Boot

Spring Boot - Request and Response Handling

Examine this Spring Boot controller method:

public ResponseEntity getStatus() {
  return ResponseEntity.ok()
    .body("Success")
    .header("X-Status", "OK");
}

What is the issue with this code?

AThe header() method cannot be called after body(); the order is incorrect

BThe body() method should return void, not ResponseEntity

CResponseEntity.ok() does not support adding headers

DThe method should return a String, not ResponseEntity

Step-by-Step Solution

Solution:

Step 1: Understand ResponseEntity builder chaining
Methods like header() must be called before body() because body() finalizes the response.
Step 2: Identify incorrect method order
Calling body() first returns a ResponseEntity, so header() cannot be chained after.
Final Answer:
The header() method cannot be called after body(); the order is incorrect -> Option A
Quick Check:
Call header() before body() [OK]

Quick Trick: Call header() before body() in ResponseEntity chain [OK]

Common Mistakes:

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