Java的String.format方法中的可变宽度 [英] Variable widths in Java's String.format method
问题描述
我正在开展一个需要显示文本树的项目。我正在尝试使用Java的String.format方法来简化格式化过程,但在尝试应用变量宽度时遇到了麻烦。
I'm working on a project in which I need to display textual trees. I'm trying to use Java's String.format method to simplify the formatting process, but I ran into trouble when trying to apply variable widths.
当前我有一个变量(一个int),称为深度。
Current I have a variable (an int) which is called depth.
我尝试执行以下操作:
String.format("%"+depth+"s"," ") + getOriginalText() + "\n";
但是我收到以下错误。
java.util.FormatFlagsConversionMismatchException: Conversion = s, Flags = 0
有关如何执行此操作的任何建议,或者我应该解决循环问题?
Any suggestions on how to do this, or should I just settle for loops?
感谢您的帮助!
推荐答案
这有效:
int depth = 5;
String str= "Hello"+ String.format("%"+depth+"s"," ") + "world" + "\n";
System.out.println(str);
它打印5而其间有空格。
It prints 5 while spaces in between.
Hello World。
Hello World.
请检查您的代码并确保 depth
已分配有效 int
value。最有可能的是(深度
中的无效值)是问题。
Please check you code and make sure that depth
is assigned with a valid int
value. Most likely that (invalid value in depth
) is the problem.
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