java string 去掉空格
String str = " hell o ";
String str2 = str.replaceAll(" ", "");
System.out.println(str2);
3.或者replaceAll(" +",""); 去掉所有空格
4.str = .replaceAll("\\s*", "");
可以替换大部分空白字符， 不限于空格
\s 可以匹配空格、制表符、换页符等空白字符的其中任意一个
5.或者下面的代码也可以去掉所有空格，包括首尾、中间
public String remove(String resource,char ch)
{
StringBuffer buffer=new StringBuffer();
int position=0;
char currentChar;
while(position {
currentChar=resource.charAt(position++);
if(currentChar!=ch) buffer.append(currentChar); } return buffer.toString();
}
测试的全部代码如下：
public class test1 {
public static void main(String[] args) {
String QJstr = " hello wch ";
String QJstr1 = remove(QJstr,' ');
System.out.println(QJstr + "\n" + QJstr1);
}
public static String remove(String resource,char ch)
{
StringBuffer buffer=new StringBuffer();
int position=0;
char currentChar;
while(position
{
currentChar=resource.charAt(position++);
if(currentChar!=ch) buffer.append(currentChar);
}
return buffer.toString();
}
}
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