Java -如何使用printf()格式化字符串和整数的混合，以在输出中获得相同的长度？

Question

我在正确格式化这篇文章时遇到问题：

       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

我试过了，它确实有效，但是有没有更好的方法呢？

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

System.out.printf("%s", fmt.format(time.getTotalDrift()) + "\n");

Answer 1

这里是来自Caio的答案之外的一小段代码。

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)参数的格式为具有12个字符的左填充字符串width
• %8s -如上所述，具有8 characters
• %5.2f的(第二个)参数-(第三个)参数必须为浮点型，其宽度为5个字符，精度为2

Answer 2

您应该查看此link。这是格式化程序类文档，它非常有用！