as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
write a java program to print all permutations of an array.
user
import java.util.arrays; 

public class permutations { 
	public static void main (string[] args) {
		int[] arr = {1, 2, 3}; 
		permute(arr, 0); 
	} 

	public static void permute(int[] arr, int index){ 
		if (index >= arr.length - 1){ 
			system.out.println(arrays.tostring(arr)); 
		} 

		for (int i = index; i < arr.length; i++){ 
			swap(arr, index, i); 
			permute(arr, index + 1); 
			swap(arr, index, i); 
		} 
	} 

	public static void swap(int[] arr, int i, int j){ 
		int temp = arr[i]; 
		arr[i] = arr[j]; 
		arr[j] = temp; 
	} 
}
assistant