Her is some code that I found somewhere that will provide this sort of feature.
It uses % and $ to indicate where the substitutions should go, and the number in between is used as an index into the String array that you supply as the second parameter.
I suspect you can adapt this to your needs.
As Simon noted, this is really just a standard Java problem, and you wil find solutions to these sorts of things by looking round the Internet rather than on here, where our focus is BlackBerry Java. i think in fact I found this code somewhere on the Net.
private final static char LEFT_INDICATOR = '%';
private final static char RIGHT_INDICATOR = '$';
/**
* Replace placeholders in template with parameters.
*
* @param message the template with placeholders
* @param params array of parameters
* @return buffer containing formatted message
*/
public static String formatMessage(String message, String[] params) {
if (message == null || message.length() < 1 || params == null || params.length < 1 ) {
throw new NullPointerException("formatMessage Template or parameter array is null or empty.");
}
boolean inside = false;
boolean escaped = false;
StringBuffer result = new StringBuffer();
StringBuffer placeholder = null;
char lookingFor = LEFT_INDICATOR;
char c;
for (int i = 0; i < message.length(); i++) {
c = message.charAt(i);
if (c == lookingFor) {
if (escaped) {
result.append(c);
escaped = false;
continue;
}
if (c == LEFT_INDICATOR) {
// look ahead for escaped indicator
if ((i + 1) < message.length() &&
message.charAt(i + 1) == LEFT_INDICATOR) {
escaped = true;
} else {
inside = true;
lookingFor = RIGHT_INDICATOR;
placeholder = new StringBuffer();
}
} else {
inside = false;
lookingFor = LEFT_INDICATOR;
// placeholder finished get parameter
int index = -1;
try {
index = Integer.parseInt(placeholder.toString());
result.append(params[index-1]);
} catch (Throwable t) {
result.append(Characters.EM_DASH); // Something
t.printStackTrace();
LibraryRepository.logEventError("Format Error for:" + message +
", placeholder: " + placeholder.toString() + ", parm #:" + params.length);
}
}
} else {
if (inside) {
placeholder.append(c);
} else {
result.append(c);
}
}
}
// for
return result.toString();
}
