import java.util.Scanner;
public class Reverse
{  
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("pLease in put a number:");
        int number=sc.nextInt();
        StringBuffer sb=new StringBuffer(""+number);
        sb.reverse();
        System.out.println(sb.toString());
    }
}

------解决方案--------------------

int a[] = {3,2,4,5,6};
int b[] = new b[5];
for(int i=0;i<a.length;i++){

b[i] = a[a.length-1];  
}

这样应该就可以了