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问题描述
我有一个非常奇怪的问题.写完之后:
for (File f : currentFile.listFiles()) {if (f.isDirectory()){System.out.println(f.getName()+" "+"Dir "+Command.getpremission(f)+" "+f.getTotalSpace());}别的{System.out.println(f.getName()+" "+"文件 "+Command.getpremission(f)+" "+f.getTotalSpace());}我看到这个打印出来了:
see.txt 文件 rw 267642728448see1.txt 文件 rw 267642728456see2.txt 文件 rw 267642728448为什么标签有问题?
解决方案基于这个问题，我使用以下代码来缩进我的消息:
String prefix1 = "短文本:";字符串前缀 2 = "looooooooooooooong 文本:";String msg = "缩进";/** 第二个字符串在 40 个字符之后开始.破折号表示* 第一个字符串是左对齐的.*/字符串格式 = "%-40s%s%n";System.out.printf(格式，前缀1，味精)；System.out.printf(格式，前缀2，味精)；这是输出:
<上一页>短文本:缩进looooooooooooooong 文本:缩进
这在 man 3 printf 中的标志字符"部分中有记录.
I have a very weird problem. After writing this:
for (File f : currentFile.listFiles()) {
if (f.isDirectory()){
System.out.println(f.getName()+" "+"Dir "+Command.getpremission(f)+" "+f.getTotalSpace());
}
else{
System.out.println(f.getName()+" "+"File "+Command.getpremission(f)+" "+f.getTotalSpace());
}
I see this printed:
see.txt File rw 267642728448
see1.txt File rw 267642728456
see2.txt File rw 267642728448
Why is there a problem with the tabs?
解决方案
Building on this question, I use the following code to indent my messages:
String prefix1 = "short text:";
String prefix2 = "looooooooooooooong text:";
String msg = "indented";
/*
* The second string begins after 40 characters. The dash means that the
* first string is left-justified.
*/
String format = "%-40s%s%n";
System.out.printf(format, prefix1, msg);
System.out.printf(format, prefix2, msg);
This is the output:
short text: indented looooooooooooooong text: indented
This is documented in section "Flag characters" in man 3 printf.
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