Java 的 String.format 方法中的可变宽度
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Variable widths in Java's String.format method
提问by Phillip Huff
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.
我正在做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，但是在尝试应用可变宽度时遇到了麻烦。
Current I have a variable (an int) which is called depth.
当前我有一个称为深度的变量（一个整数）。
I try to do the following:
我尝试执行以下操作：
String.format("%"+depth+"s"," ") + getOriginalText() + "\n";
However I get the following error.
但是我收到以下错误。
java.util.FormatFlagsConversionMismatchException: Conversion = s, Flags = 0
Any suggestions on how to do this, or should I just settle for loops?
关于如何做到这一点的任何建议，还是我应该只解决循环？
Thanks for the help!
谢谢您的帮助！
采纳答案by Yogendra Singh
This works:
这有效：
int depth = 5;
String str= "Hello"+ String.format("%"+depth+"s"," ") + "world" + "\n";
System.out.println(str);
It prints 5 while spaces in between.
它打印 5 而中间有空格。
Hello World.
你好世界。
Please check you code and make sure that depthis assigned with a valid intvalue. Most likely that (invalid value in depth) is the problem.
请检查您的代码并确保depth分配了有效值int。很可能是（中的无效值depth）是问题所在。
回答by samsam
You could try the following using "System.out.printf" command:
您可以使用“System.out.printf”命令尝试以下操作：
int depth = 10;
System.out.printf("%s" + "%" +depth + "s", "Hello","World" );
Hello World
你好世界
