Java 输出文件格式
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Java output file formatting
提问by Brendan Lesniak
I am having a bit of trouble formatting an output file for myself to be easily readable. I am trying to output the file such as:
我在为自己格式化输出文件以使其易于阅读时遇到了一些麻烦。我正在尝试输出文件，例如：
Name of School Size of School
-------------- --------------
Blblah blah 1300
Blah blah blah 11300
Blah blah blah asdf 14220
Blah bblah 1300
but am having trouble. Currently I am using the following code to get the following output:
但我遇到了麻烦。目前我正在使用以下代码来获得以下输出：
File file1 = new File("src\sortedInt.txt");
Formatter fmt = new Formatter(file1);
HelperMethods.quickSortStudents(colleges, 0, colleges.length - 1);
for(int i = 0; i < colleges.length; i++)
{
fmt.format(colleges[i].nameOfSchool + "%20d" + "\n", (int)colleges[i].numOfStudents);
fmt.flush();
}
which gives me:
这给了我：
eastman school of music 800
clark university 1100
walla walla college 1100
drew 1200
juilliard 1200
Because I am just padding from the end of the college name. Is there anyway to pad the whole string so all the strings are a constant length?
因为我只是从大学名称的末尾填充。无论如何都要填充整个字符串，以便所有字符串的长度都是恒定的？
Thank you everyone for you help
谢谢大家的帮助
回答by Mac
Yep, output your college name left-justified and padded to a certain length, then output your number of student right-justified and padded to a certain length:
是的，输出你的大学名称左对齐并填充到一定长度，然后输出你的学生人数右对齐并填充到一定长度：
fmt.format("%-20s%10d\n", colleges[i].nameOfSchool, (int) colleges[i].numOfStudents);
回答by Iwan Luijks
You might want to add the name of the schools to be formatted too, as the following:
您可能还想添加要格式化的学校名称，如下所示：
fmt.format("%1s %1d\n", colleges[i].nameOfSchool, (int)colleges[i].numOfStudents);
The following link can give you more insight in formatting: http://download.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html
以下链接可以让您更深入地了解格式：http: //download.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html
