public/subjects/java/checkpoints/harmonious-fusion/README.md

## Harmonious Fusion

### Instructions

Create a class `HarmoniousFusion` that provides a method to merge two sorted arrays into one sorted array. The merged array should also be sorted.

### Expected Class

```java
public class HarmoniousFusion {
    public int[] merge(int[] arr1, int[] arr2) {
        // Implementation to merge two sorted arrays into one sorted array
    }
}
```

### Usage

Here is a possible `ExerciseRunner.java` to test your class:

```java
import java.util.Arrays;

public class ExerciseRunner {
    public static void main(String[] args) {
        HarmoniousFusion merger = new HarmoniousFusion();

        // Test case 1
        int[] arr1 = {1, 3, 5};
        int[] arr2 = {2, 4, 6};
        int[] mergedArray = merger.merge(arr1, arr2);
        System.out.println(Arrays.toString(mergedArray)); // Expected output: [1, 2, 3, 4, 5, 6]

        // Test case 2
        int[] arr3 = {1, 3, 5, 7};
        int[] arr4 = {2, 4, 6};
        mergedArray = merger.merge(arr3, arr4);
        System.out.println(Arrays.toString(mergedArray)); // Expected output: [1, 2, 3, 4, 5, 6, 7]
    }
}
```

### Expected Output

```shell
$ javac *.java -d build
$ java -cp build ExerciseRunner
[1, 2, 3, 4, 5, 6]
[1, 2, 3, 4, 5, 6, 7]
$
```