Wave Array in Java: Explanation & Practice

Convert array to wave form

Problem summary

Arrange array in wave form: arr[0] >= arr[1] <= arr[2] >= arr[3]...

Starter code

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5}; // Test case 1
        
        // Convert to wave form
        // Print elements space-separated
    }
}

Expected output and test cases

Wave of [1,2,3,4,5]
```
2 1 4 3 5
```
Wave of 6 elements
```
2 1 4 3 6 5
```
Wave of 3 elements
```
2 1 3
```

Hints

Swap adjacent pairs at even indices
Swap arr[i] and arr[i+1] for i=0,2,4...
Works on sorted or unsorted arrays

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