blocks|key|1115970|text|试试这个--你必须使用import+java.util.regex.*;|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1115971|++++Pattern+pattern+=+Pattern.compile("\\s%2B");
++++Matcher+matcher+=+pattern.matcher(string);
++++boolean+check+=+matcher.find();
++++String+str+=+matcher.replaceAll("+");|code-block|syntax|javascript|1115972|其中string是您需要删除重复空格的字符串|1115973|entityMap^0|B|P|0|0|2|6|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

Try this - You have to <code>import java.util.regex.*;</code>

<pre><code> Pattern pattern = Pattern.compile("\\s+");
 Matcher matcher = pattern.matcher(string);
 boolean check = matcher.find();
 String str = matcher.replaceAll(" ");
</code></pre>

Where <code>string</code> is your string on which you need to remove duplicate white spaces

blocks|key|901220|text|如果你想去掉所有前导和尾随的无关空格，那么你可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|901221|//+\\A+=+Start+of+input+boundary
//+\\z+=+End+of+input+boundary+
string+=+string.replaceAll("\\A\\s%2B(.*?)\\s%2B\\z",+"$1");|code-block|syntax|javascript|901222|然后，您可以使用下面列出的其他策略删除重复项：|901223|string+=+string.replaceAll("\\s%2B","+");|901224|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

If you want to get rid of all leading and trailing extraneous whitespace then you want to do something like this:

<pre><code>// \\A = Start of input boundary
// \\z = End of input boundary 
string = string.replaceAll("\\A\\s+(.*?)\\s+\\z", "$1");
</code></pre>

Then you can remove the duplicates using the other strategies listed here:

<pre><code>string = string.replaceAll("\\s+"," ");
</code></pre>

blocks|key|901268|text|嗨，我发现的最快的(但不是最漂亮的)方式是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|901269|while+(cleantext.indexOf("++")+!=+-1)
++cleantext+=+StringUtils.replace(cleantext,+"++",+"+");|code-block|syntax|javascript|901270|与正则表达式相比，它在android上的运行速度相当快|901271|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

hi the fastest (but not prettiest way) i found is

<pre><code>while (cleantext.indexOf(" ") != -1)
 cleantext = StringUtils.replace(cleantext, " ", " ");
</code></pre>

this is running pretty fast on android in opposite to an regex

blocks|key|1116086|text|您还可以尝试对任何空格、制表符、换行符和all使用字符串令牌。一个简单的方法是，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1116087|String+s+=+"Your+Text+Here";++++++++
StringTokenizer+st+=+new+StringTokenizer(+s,+"+"+);
while(st.hasMoreTokens())
{
++++System.out.print(st.nextToken());
}|code-block|syntax|javascript|1116088|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can also try using String Tokeniser, for any space, tab, newline, and all. A simple way is,

<pre><code>String s = "Your Text Here"; 
StringTokenizer st = new StringTokenizer( s, " " );
while(st.hasMoreTokens())
{
 System.out.print(st.nextToken());
}
</code></pre>

blocks|key|1116104|text|String+str+=+"+++Text++++with++++multiple++++spaces++++";
str+=+org.apache.commons.lang3.StringUtils.normalizeSpace(str);
//+str+=+"Text+with+multiple+spaces"|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1116105|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre class="lang-java prettyprint-override"><code>String str = " Text with multiple spaces ";
str = org.apache.commons.lang3.StringUtils.normalizeSpace(str);
// str = "Text with multiple spaces"
</code></pre>

How to remove duplicate white spaces (including tabs, newlines, spaces, etc...) in a string using Java?

How to remove duplicate white spaces in string using Java?

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如何删除重复的空格(包括制表符、换行符、空格等)在字符串中使用Java？

问如何使用Java删除字符串中的重复空格？
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