How to format the print statement

[ftrengnr]

i have to print the powers of 2 from 0-7 in a pyramid. i have the right amount of rows and the right numbers in the rows but i do not know how to format it to make a pyramid shape

here is what i have so far:

public class numberPyrimid {

//main method.
public static void main(String[] args) {

//create variable
int pwr;
int nmbr;
String output;

//create loops for rows and length of rows

//length of rows
for(int i = 1; i<=15;i+=2){
output = "";
//figure power for row
pwr = i/2;

//amount of rows
for(int x = 0; x<=pwr;x++){

//make math. return int
nmbr = (int) Math.pow(2, x);

//print for ramp up
//System.out.printf(nmbr+" ");

output = output+Integer.toString(nmbr)+" ";

}
//loop for ramp down
for(int x = (pwr-1); x >= 0 ; x--){

//make math. return int
nmbr= (int)Math.pow(2, x);

//print for ramp down
//System.out.print(nmbr+" ");

output = output+Integer.toString(nmbr)+" ";


}

//print out
System.out.printf(" "+output);
//print next line
System.out.println();

}




}

}

[Norm]

how to format it to make a pyramid shape

Print leading spaces, with fewer on each line.