在Java中与printf左对齐

当我运行程序时，阶乘值右对齐。 有没有办法让它左对齐，同时保持其间的50个空格？

public class Exercise_5_13 { public static void main( String[] args ) { int[] numbers = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 }; long factorial = 0; try { System.out.print("\n\n"); System.out.printf("%s%50s\n", "Integer", "factorial"); for ( int number : numbers ) { System.out.printf( "%4d", number); factorial = (long)1; for(int i=1; i <= number; i++) factorial = factorial * (long)i; System.out.printf("%50.0f\n",(double)factorial); } System.out.print("\n\n"); } catch (Exception e) { e.printStackTrace(); } } } 

Answer 1

根据printf()规范， -符号左对齐输出。

 System.out.printf("%-50.0f\n",(double)factorial); 

来源： http ： //docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax