给你段代码吧:
public class SpaceCharactor { public static void main(String[] args) {
String temp = "12 3 4 5 6 7 8 9";
StringBuffer sb = new StringBuffer();
boolean bFound = false; for(int i = 0; i < temp.length(); i++) {
if (temp.charAt(i) != ' ') {
bFound = false;
sb.append(temp.charAt(i));
}else {
if(!bFound) {
bFound = true;
sb.append(temp.charAt(i));
}
}
}// end for
System.out.println(sb);
}}
public class SpaceCharactor { public static void main(String[] args) {
String temp = "12 3 4 5 6 7 8 9";
StringBuffer sb = new StringBuffer();
boolean bFound = false; for(int i = 0; i < temp.length(); i++) {
if (temp.charAt(i) != ' ') {
bFound = false;
sb.append(temp.charAt(i));
}else {
if(!bFound) {
bFound = true;
sb.append(temp.charAt(i));
}
}
}// end for
System.out.println(sb);
}}
{
public String replaceString( String src, String older, String newer){
boolean endsWithTkn = src.endsWith(older);
boolean startsWithTkn = src.startsWith(older);
String strRtn = "";
StringTokenizer stkn = new StringTokenizer( src, older); while (stkn.hasMoreTokens()){
strRtn += stkn.nextToken() + newer;
} if (startsWithTkn){
strRtn = newer + strRtn;
} if (endsWithTkn){
return strRtn;
}
return strRtn.substring(0,strRtn.length() - newer.length());
} public static void main(String[] args)
{
String src = " 345 44 4 5 45 6 ";
String older = " ";
String newer = " ";
String tmp = ""; ConvertString1 app = new ConvertString1();
tmp = app.replaceString(src, older, newer); System.out.println(tmp);
}
}
import java.util.StringTokenizer;public class stringBlank { public stringBlank() {
}
public static void main(String[] args) {
String s = "1 2 3 4 6 9 " ;
String ss = new String() ;
StringTokenizer st = new StringTokenizer(s," ");
while (st.hasMoreTokens()) ss +=st.nextToken();
//ss+="sdfg";
System.out.println(ss); }}
import java.util.*;
public class Test
{
public static void main(String args[]) {
String str1 = " adf 1d sd2 2fe sdf ";
StringTokenizer st1 = new StringTokenizer(str1);
String str = "";
while (st1.hasMoreTokens()) {
str = str + st1.nextToken();//去除空格
}
str = str.trim();//去除前导和追尾空格
System.out.println(str);
System.out.println(str1);
}
}
import java.util.regex.*;
class regTry{
public static void main(String[] args){
String s=" adf 1d sd2 2fe sdf ";
Pattern p=Pattern.compile("\\s{2,}");
Matcher m = p.matcher(s);
System.out.println("123456789012345678901234567890");//标尺
System.out.println("|"+m.replaceAll(" ")+"|");
}
}