Thread: Trying to get an "if" statement to work in a "for loop".

This isn't homework, it's a question in a textbook practice example that I can't seem to get right.
I got it to work with 3 for loops, but I don't know how to get it to work with 2 for loops and a if statement.
Can someone show me how to get the following :

 
/* 
*Write a nested for loop to display the following matrix: 
*1 2 3 4
*   1 2 3
*      1 2
*         1
* basically they just increase by 2 spaces every iteration it seems like.
*/
 
 
//this is as much of a layout of my code i can do
 
for (int i = 1; i <= 4; i++) {
    for (int j = 1; j <= 5 - i; j++) { //i have a feeling the if statement should go after the 2nd for loop, but i can't get it to work.
        System.out.print(j + " ");
    }
    System.out.println();
}

I just assumed there needed to be an if statement because I couldn't get each row to increase by " " (2 spaces) each time. How would you increase it by 2 spaces each iteration then? normally this would just print 1 2 3 4 for each row and have 4 columns, but instead its decreasing by 1 number (which i did by j<=5-i) and also shifting to the right every iteration which i can't figure out how to do. Is there a way to do that with just 2 for loops?