Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.Collection;
import java.util.List;

public class Main {
    public static <T> String concatUpto(List<T> col, int toIndex, String separator) {

        return concat(col, 0, toIndex, separator);

    }

    public static <T> String concat(Collection<T> col, String separator) {

        StringBuilder result = new StringBuilder();

        for (T e : col) {
            String s = e.toString();
            if (!s.isEmpty()) {
                if (result.length() > 0)
                    result.append(separator);
                result.append(s);
            }
        }

        return result.toString();

    }

    public static <T> String concat(List<T> col, int fromIndex, int toIndex, String separator) {

        if (fromIndex < 0 || toIndex > col.size() || fromIndex > toIndex)
            return "";

        return concat(col.subList(fromIndex + 1, toIndex), separator);

    }
}