Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.*;

public class Main {
    /**
     * Join a bunch of objects into a string delimited by the separator
     *
     * @param sep
     * @param c
     * @return
     */
    public static String join(final String sep, final Collection<? extends Object> c) {
        if (c == null) {
            return null;
        }
        if (c.size() == 1) {
            return String.valueOf(c.iterator().next());
        }
        if (c.size() == 0) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        String s = "";
        for (final Object o : c) {
            sb.append(s).append(String.valueOf(o));
            s = sep;
        }
        return sb.toString();
    }

    /**
     * Join a bunch of objects into a string delimited by the separator
     *
     * @param sep
     * @param ol
     * @return
     */
    public static String join(final String sep, final Object... ol) {
        if (ol == null || ol.length == 0) {
            return "";
        }
        if (ol.length == 1) {
            return String.valueOf(ol[0]);
        }
        final StringBuilder sb = new StringBuilder();
        String s = "";
        for (final Object o : ol) {
            sb.append(s).append(String.valueOf(o));
            s = sep;
        }
        return sb.toString();
    }

    /**
     * @param sep
     * @param sl
     * @return
     */
    public static String join(final String sep, final String... sl) {
        return join(sep, (Object[]) sl);
    }

    public static int size(Collection<?> c) {
        return (c == null) ? 0 : c.size();
    }
}