Removing the comma from the last element in the string of array

Question

Any suggestions for removing the comma in last element of the array when it prints?

public static void printList(String[] words, int count) {
    for (int i=0; i < count; i++) {
        System.out.print(words[i] + ",");
    }
}

Answer 1

One quick approach:

public static void printList(String[] words, int count) {
    for(int i = 0; i < count; i++) {
        System.out.print(words[i]);
        if(i != count-1) System.out.print(",");
    }
}

Answer 2

One way I like to handle this problem is to conditionally prepend a comma only for the second word onwards:

public static void printList(String[] words, int count) {
    for (int i=0; i < count; i++) {
        if (i > 0) System.out.print(",");
        System.out.print(words[i]);
    }
}

You could also build the output string you want, and then trim off the final comma:

StringBuilder sb = new StringBuilder();
for (int i=0; i < count; i++) {
    sb.append(words[i]).append(",");
}
String output = sb.toString().replaceAll(",$", "");
System.out.println(output);