Merge dimensional arrays to one

MultiDimentionalArray

public class MultiDimensionalArray {

	public static Object[][] merge(Object[][]a, Object[][]b){
		Object[][] toBeReturned;
		
		int aLength = a.length;
		int bLength = b.length;
		
		toBeReturned = new Object[aLength+bLength][];
				
		System.arraycopy(a, 0, toBeReturned, 0, a.length);
		System.arraycopy(b, 0, toBeReturned, a.length, b.length);
		return toBeReturned; 
	}
}