JAVA中去掉空格????
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1.?String.trim()???
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trim()是去掉首尾空格???
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2.str.replace("?",?"");?去掉所有空格，包括首尾、中間???
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String?str?=?"?hell?o?";???
String?str2?=?str.replaceAll("?",?"");???
System.out.println(str2);???
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3.或者replaceAll("?+","");?去掉所有空格???
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4.str?=?.replaceAll("\\s*",?"");???
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可以替換大部分空白字符，?不限于空格????
\s?可以匹配空格、制表符、換頁符等空白字符的其中任意一個???
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5.或者下面的代碼也可以去掉所有空格，包括首尾、中間???
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public?String?remove(String?resource,char?ch)???
????{???
????????StringBuffer?buffer=new?StringBuffer();???
????????int?position=0;???
????????char?currentChar;???
??
????????while(position<resource.length())???
????????{???
????????????currentChar=resource.charAt(position++);???
????????????if(currentChar!=ch)?buffer.append(currentChar);?}?return?buffer.toString();???
????}??
-------------------------------Test----------------------------------------------------- package?practisedemo;
public?class?Demo{
?
?public?static?String?remove(String?resource,char?ch)???
?{???
?????StringBuffer?buffer=new?StringBuffer();???
?????int?position=0;???
?????char?currentChar;???

?????while(position<resource.length())???
?????{???
?????????currentChar=resource.charAt(position++);??
?????????//如果當前字符不是要去除的字符，則將當前字符加入到StringBuffer中
?????????if(currentChar!=ch)?buffer.append(currentChar);?
?????}?
?????return?buffer.toString();???
?}
?public?static?void?main(String?args[])?{
???String?str=?"afdsfdf?了???2012???0407 Alamps?老師";
???char?c='?';
??????System.out.println("結果為："+Demo.remove(str,?c));
??????
??????
?}
}

?

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