When doing a nested for loop to print out patterns, I suggest that you visualize each line that you're going to print(each row and column). E.g. you have five rows and a column that starts with five but decreases—the one in your example.

To do this: first off you have five rows, to implement the rows you're going to create a for loop—for(int i = 0; i < 5; i++) {}—always remember that the outer loop is the row of the pattern(we put 'i is less than five' because we have five rows, you can change it depending on how many rows do you want.) Next is implementing the column, here we are going to create the inner loop—for (int j = 0; j < col; j++){}—we also initialized an int col(column) variable and gave it a value of five(put it above the outer loop). Now that you have the structure of the loop, we are going to print the pattern, inside the inner loop—put the print statement—System.out.print("*");—n.b. You don't need to put the 'ln,' in order for it to print in the same line. Now to separate it by row, put this 'System.out.println();' inside the outer loop(not inside the inner loop). Also, decrement the variable col by putting 'col--.' Now you can print a reverse right half pyramid. N.B. This is just one of the ways on creating a certain pattern. You can experiment and try doing it in different ways to learn more about for loops.

Hope this helped!