I am getting the values from arraylist arr and storing those values in a string with comma separator. But for the last value also comma is adding. How can I remove that? Please help me...
My Code:
ArrayList<String> arr;
String str;
for (int i = 0; i < arr.size(); i++) {
int kk = arr.size();
System.out.println("splitting test" + arr.get(i));
str += arr.get(i) + ",";
System.out.println("result" + str);
}
Do not add it at all:
ArrayList<String> arr;
String str;
for (int i = 0; i < arr.size(); i++) {
int kk = arr.size();
System.out.println("splitting test" + arr.get(i));
str += arr.get(i);
if (i + 1 != arr.size()) {
str+= ",";
}
System.out.println("result" + str);
}
What about this:
StringBuilder builder = new StringBuilder();
for(Object item : arrayOrIterable) builder.append(item).append(",");
String result = builder.deleteCharAt(builder.length() - 1).toString();
Try:
str.substring(0, str.length()-1);
If you try this, I think is should work.
ArrayList<String> arr;
String str;
for (int i = 0; i < arr.size(); i++) {
int kk = arr.size();
System.out.println("splitting test" + arr.get(i));
str += arr.get(i) + i!=arr.size()-1?"":",";
System.out.println("result" + str);
}
You can always write like this.
String str;
for (int i = 0; i < arr.size(); i++) {
int kk = arr.size();
System.out.println("splitting test" + arr.get(i));
// It is your old code str += arr.get(i) + ",";
// Insted write like this
str += arr.get(i);
if (i < arr.size() - 1) {
str += ",";
}
System.out.println("result" + str);
}
add one condition in for loop
if(i == arr.size()-1)
{
str += arr.get(i);
}
else
{
str += arr.get(i) + ",";
}
You have to pass array list to this function. it will return comma separated values.
public static <T> String getReasonArray(Collection<T> values) {
if (values == null || values.isEmpty()) return "";
StringBuilder result = new StringBuilder();
for (T val : values) {
result.append(val);
result.append(",");
}
return result.substring(0, result.length() - 1);
}
