Recap - Control Flow

Part of the Logic & Flow section of Coddy's Java journey — lesson 39 of 59.

Challenge

Create a method named processArray that takes two arguments:

A 1D array of Objects (data) containing mixed types (Integer, String, or Double)
A String (type) for processing type: "sum" or "find"

Your solution should demonstrate these concepts:

Use guard clauses to validate input at the start of the method
Use instanceof pattern matching to check and cast types (e.g., if (value instanceof Integer i))
Use switch expressions with arrow syntax (e.g., switch (type) -> {)
Use labeled loops with break or continue (e.g., search: for())

Processing rules:

"sum": Add all numeric values (ignore strings)
"find": Find first numeric value greater than 100

Return messages should be:

If array is null or empty: return "Invalid input"
If type is invalid: return "Invalid type"
For "sum": return "Sum: X"
For "find": return index of found value or "Not found"

Try it yourself

import java.util.Scanner;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;

public class Main {
    public static String processArray(Object[] data, String type) {
        // Write your code here
    }
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String dataJson = scanner.nextLine();
        String type = scanner.nextLine();
        
        Type arrayType = new TypeToken<Object[]>(){}.getType();
        Object[] data = new Gson().fromJson(dataJson, arrayType);
        
        System.out.println(processArray(data, type));
    }
}