java 用空格替换制表符
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Replace tab with blank space
提问by ChosenForWorlds
final String remove = " " // tab is 3 spaces
while (lineOfText != null)
{
if (lineOfText.contains(remove))
{
lineOfText = " ";
}
outputFile.println(lineOfText);
lineOfText = inputFile.readLine();
}
I tried running this but it doesn't replace the tabs with one blank space. Any solutions?
我尝试运行它，但它不会用一个空格替换选项卡。任何解决方案？
回答by Elliott Frisch
Tab is not three spaces. It's a special character that you obtain with an escape, specifically final String remove = "\t";and
Tab 不是三个空格。这是一个特殊的字符，你有逃生获得，特别是final String remove = "\t";和
if (lineOfText.contains(remove))
lineOfText = lineOfText.replaceAll(remove, " ");
}
or remove the if(because replaceAlldoesn't need it) like,
或删除if（因为replaceAll不需要它）像，
lineOfText = lineOfText.replaceAll(remove, " ");
回答by Daniel Plaku
You can simply use this regular expression to replace any type of escapes( including tabs, newlines, spaces etc.) within a String with the desired one:
您可以简单地使用此正则表达式将字符串中的任何类型的转义符（包括制表符、换行符、空格等）替换为所需的转义符：
lineOfText.replaceAll("\s", " ");
Here in this example in the string named lineOfTextwe have replaced all escapes with whitespaces.
在此示例中，在名为lineOfText的字符串中，我们已将所有转义符替换为空格。
