打印2的n次方数字三角形

/*
2
2 4
2 4 8
2 4 8 16
2 4 8 16 32
2 4 8 16 32 64
*/

public class Test {
public static void main(String[] args) {
int i = 1;
while (i <= 6) {
method1(i, 2);
i++;
}
}

public static void method1(int i, int num) {
for (int j = 1; j <= i; j++) {
System.out.print(num + " ");
num *= 2;
}

System.out.println();
}
}