Java - 如何使用 printf() 格式化字符串和整数的混合，以便在输出中获得相等的长度

Question

我在正确格式化时遇到问题：

       starting       mechanical cuchoo clock time [ 0:00:00], total drift = 0.00 seconds
    after 1 day      mechanical cuchoo clock time [23:59:00], total drift = 60.00 seconds

正确的格式是：

   starting  mechanical cuckoo clock time [ 0:00:00], total drift = 0.00 seconds
after 1 day  mechanical cuckoo clock time [23:59:00], total drift = 60.00 seconds

我试过这个，它确实有效，但有更好的方法吗？

System.out.printf("%60s", this.getClockType() + " cuchoo clock time [" + time.formattedReportedTime() +
            "], " + "total drift = ");
System.out.printf("%s", fmt.format(time.getTotalDrift()) + "n");

Answer 1

除了Caio的答案之外，还有一个小片段。

String format = 
    "%12s  mechanical cuckoo clock time [%8s], total drift = %5.2f seconds%n";
System.out.printf(format, "starting", "0:00:00", 0.0);
System.out.printf(format, "after 1 day", "23:59:00", 60.0);

输出

   starting  mechanical cuckoo clock time [ 0:00:00], total drift =  0.00 seconds
after 1 day  mechanical cuckoo clock time [23:59:00], total drift = 60.00 seconds

• %12s - （第一个）参数将被格式化为左侧填充字符串，宽度为 12 个字符
• %8s - 如上所述，包含 8 个字符的 （第二个） 参数
• %5.2f - （第三个）参数（必须是浮点类型）的格式为 5 个字符，精度为 2

Answer 2

您应该查看此链接。这是格式化程序类文档，它非常有用！