Rather than using "split" method, is there any easy way to get all the index values of double quote character ("") on following String. Thanks.
String command = "-u User -P Password mkdir \"temp dir\" rmdir \"host dir\"";
int[] indexAll = command.indexOf ("\""); // This line of code is not compile, only I expect this kind of expression
There is no built in method that does this.
Use the overloaded String#indexOf(String, int) method that accepts a starting position. Keep looping until you get -1, always providing the result of the previous call as the starting position. You can add each result in a List and convert that to an int[] later.
Alternatively, use Pattern and Matcher, looping while Matcher#find() returns a result.
Here are a few examples:
public static void main(String[] args) {
String command = "-u User -P Password mkdir \"temp dir\" rmdir \"host dir\"";
List<Integer> positions = new LinkedList<>();
int position = command.indexOf("\"", 0);
while (position != -1) {
positions.add(position);
position = command.indexOf("\"", position + 1);
}
System.out.println(positions);
Pattern pattern = Pattern.compile("\"");
Matcher matcher = pattern.matcher(command);
positions = new LinkedList<>();
while (matcher.find()) {
positions.add(matcher.start());
}
System.out.println(positions);
}
prints
[26, 35, 43, 52]
[26, 35, 43, 52]
This is similar to Sotirios method, but you can avoid converting back to array, by first finding number of occurrences so that you can initialize array.
String command = "-u User -P Password mkdir \"temp dir\" rmdir \"host dir\"";
int count = command.length() - command.replace("\"", "").length();
int indexAll[] = new int[count];
int position = 0;
for(int i = 0; i < count; i++) {
position = command.indexOf("\"", position + 1);
indexAll[i] = position;
}
StringUtils.countMatches is neater, int indexAll[] = new int[StringUtils.countMatches(command,"\"")]; but that's just preference. commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/…