what is the logic of this pattern?

this is my code.. use string and array:P

public class pattern_ { public static void main(String args[]) {int a[]={1,2,3,4,5}; String S=""; String S1=""; String space=" ";//use a for loop in case of user inputs to create this string int j=5;//space length for(int i=0;i

class NumberPattern{ public static void main(String[] args) { int k; for(int i=1;i<=5;i++) { for(int j=5;j>i;j--) { System.out.print(" "); } for(k=1;k<=i;k++) { System.out.print(k); } --k; for(int l=--k;l>=1;l--) { System.out.print(l); } System.out.println(); }

}

}