SwapNew.java

package array;

import java.util.Arrays;

public class Swap {
	public static void main(String[] args) {
		int[] data1 = {1,2,3,4,5};
		System.out.println("before " + Arrays.toString(data1));
		swap(data1);
		int[] data2 = null;
		System.out.println("before " + Arrays.toString(data2));
		swap(data2);
		int[] data3 = new int[0];
		System.out.println("before " + Arrays.toString(data3));
		swap(data3);
	}

	private static void swap(int[] data){
		if(data == null || data.length == 0 ){
			System.out.println("after  -1");
			
		}
		else {		
				for(int k = 0; k<data.length-1; k++){
					if (data [k] > data [k + 1]) {
					int temp;
					temp=data[k];
					data[k]=data[k+1];
					data[k+1]=temp;
					}
				}
				System.out.println("after " + Arrays.toString(data));
			}
					
}
}

Все тоже. Плохо.