I am trying to convert String builder to String array in java.I have used to String method to convert the Stringbuilder to String and then use split method to convert it to String array.
I am facing some issue in array size. The output of String builder is as follows: 0,,1,,,,,,,,,,2,,,
. Actually it contains 15 elements, but it's showing the size of stringbuilder as 18. And after converting to String array, it's showing size as 13.
Am I doing wrong method? Is there is other method to convert String builder to String Array?
StringBuilder output = new StringBuilder();
for (String str : listToSearch) {
int index = findIndex(headerArrayList, str);
if (index > -1) {
output.append(index);
} else {
output.append(str);
}
output.append(",");
}
String out = output.toString();
String[] destIndexArray = out.split(",");
The findIndex
method:
private static int findIndex(List<String> headerList, String element) {
for (int i = 0; i < headerList.size(); i++) {
if (headerList.get(i).equals(element)) {
return i;
}
}
return -1;
}
There are many places your code need improvements. I'm suggesting some:
String
s instead of index.List<String>
instead ofStringBuilder
.Yes, but if you follow above points, you won't need it. but since you asked. See this: How can a StringBuilder best be converted to a String[]?