Question

我遇到了正确格式化问题：

       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

我试过这个并且它确实有效，但是有更好的方法吗？

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，这里还有一个小片段。

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边填充的字符串，宽度为12个字符
%8s - 如上所述，（第二个）参数包含8个字符
%5.2f - （第三个）参数，必须是浮点类型，格式为5个charcaters，精度为2

Answer 2

您应该检查此link。它是格式化程序类文档，它非常实用！

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等的长度？

2 个答案: