试试这个
StringTokenizer t = new StringTokenizer(str," ");
result = t.nextToken();
Boolean first = str.tocharArray()[0]==' ';
Boolean last = str.tocharArray()[str.length()-1]==' ';
while(t.hasMoreTokens())
{
result += " " + t.nextToken();
}
switch(strMode)
{
case 0 : if(last) result += " ";
break;
case 1 : if(first) result = " " + result;
break;
}
System.out.println(result);
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