public class OptimizeThis {
public static void main(String[] args) {
int size = 9;
for (int i = 1; i <= size; i++) {
for (int j = 1; j <= size * 2 - 1; j++) {
if (i > 1 && size > i && ((i * 2 - 1 == j) || size * 2 - i * 2 + 1 == j)) {
System.out.print(" ");
} else if (j % 2 == 0) {
System.out.print(" ");
} else {
System.out.print("*");
}
}
System.out.println();
}
}
}
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