java - 在Java中从字符串中删除空格(Removing whitespace from strings in Java)

Question

I have a string like this:

(我有一个像这样的字符串：)

mysz = "name=john age=13 year=2001";

I want to remove the whitespaces in the string.

(我想删除字符串中的空格。)

I tried trim() but this removes only whitespaces before and after the whole string.

(我试过trim()但这只删除了整个字符串前后的空格。)

I also tried replaceAll("\\W", "") but then the = also gets removed.

(我也尝试了replaceAll("\\W", "")但是=也被删除了。)

How can I achieve a string with:

(如何使用以下方法实现字符串：)

mysz2 = "name=johnage=13year=2001"

  ask by zyamat translate from so

Answer 1

st.replaceAll("\\s+","") removes all whitespaces and non-visible characters (eg, tab, \n ).

(st.replaceAll("\\s+","")删除所有空格和不可见字符（例如，tab， \n ）。)

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st.replaceAll("\\s+","") and st.replaceAll("\\s","") produce the same result.

(st.replaceAll("\\s+","")和st.replaceAll("\\s","")产生相同的结果。)

The second regex is 20% faster than the first one, but as the number consecutive spaces increases, the first one performs better than the second one.

(第二个正则表达式比第一个正则表达式快20％，但是随着连续空格数量的增加，第一个正则表达式的性能要好于第二个正则表达式。)

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Assign the value to a variable, if not used directly:

(将值分配给变量（如果不直接使用）：)

st = st.replaceAll("\s+","")