what does this mean? >> (String... words)

Question about the task

Under discussion

what are these dots for ? and how is my tactic to find the solution here? i try to use 2 for-loops to compare one word of the list with the next (i = 0 & j = i +1) is this approach useful, or is there a better way to do so? thanks

In the main method, read the name of a file that contains words separated by spaces from the console.
In the getLine method, use StringBuilder to order all the words as follows: the last letter of a word must match the first letter of the next word (ignore case).
Each word should be used once.
The getLine method can return any variant.
Separate words with a space.
Display the resulting string on the screen.

Example input file:

Okinawa Washington Auckland Kalamazoo Norfolk

Result:

Washington Norfolk Kalamazoo Okinawa Auckland

Requirements:

The main method must read the filename from the keyboard.
There should not be static fields in the Solution class.
The getLine method must use StringBuilder.
The getLine method must return an empty string (an empty StringBuilder) if it is not passed arguments (words).
The getLine method must not change the arguments (words).
All words passed to the getLine method must be included in the resulting string, if possible.
The screen output must match the task conditions.

package com.codegym.task.task22.task2209; import java.util.*; import java.io.*; /* Make a word chain */ public class Solution { public static void main(String[] args) throws IOException { // ... BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String[] strings = null; while(reader.ready()){ strings = reader.readLine().split("\\s+"); } getLine(strings); StringBuilder result = getLine(); System.out.println(result.toString()); } public static StringBuilder getLine(String... words) { StringBuilder str = new StringBuilder(); for(int i = 0; i < words.length; i++){ String first = words[i]; str.append(words[0]); for(int j = i+1; j < words.length; j++){ String second = words[j]; int n = first.length(); if(first.indexOf(n) == second.indexOf(0)){ str.append(words[j]); break; } } } return str; } }

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klesk

Level 31 , Duisburg, Germany

7 August 2020, 06:07

The 3 dots mean, that the number of arguments, with which the method is called, can vary. In this case the parameter words is an array. So the Method can by called with

public static StringBuilder getLine("1", "2", "3", "4") {}

public static StringBuilder getLine("1", "2") {}

And also, you can call it with an array as argument

public static StringBuilder getLine(new String() { "1", "2"}) {}

or nothing

public static StringBuilder getLine() {}

You can access the arguments, like you would typically access an array.