Java Array Join join(String[] strings, String separator)

Description

Join all strings into a new concatenated string.

License

Open Source License

Parameter

Parameter	Description
strings	a parameter
separator	a parameter

Return

concatenated string with separator in between elements.

Declaration

public static String join(String[] strings, String separator) 

Method Source Code

//package com.java2s;

import java.util.Arrays;

import java.util.List;

public class Main {
    /**/*from  w ww .  ja  va  2 s .  c o m*/
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @return concatenated string with separator in between elements. 
     */
    public static String join(String[] strings, String separator) {
        return join(Arrays.asList(strings), separator, false, false);
    }

    /**
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @param skipEmpty
     * @return concatenated string with separator in between elements. 
     */
    public static String join(String[] strings, String separator, boolean skipEmpty) {
        return join(Arrays.asList(strings), separator, skipEmpty, false);
    }

    /**
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @param skipEmpty
     * @param skipNull
     * @return concatenated string with separator in between elements. 
     */
    public static String join(String[] strings, String separator, boolean skipEmpty, boolean skipNull) {
        return join(Arrays.asList(strings), separator, skipEmpty, skipNull);
    }

    /**
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @return concatenated string with separator in between elements. 
     */
    public static String join(List<String> strings, String separator) {
        return join(strings, separator, false, false);
    }

    /**
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @param skipEmpty
     * @return concatenated string with separator in between elements. 
     */
    public static String join(List<String> strings, String separator, boolean skipEmpty) {
        return join(strings, separator, skipEmpty, false);
    }

    /**
     * Join all strings into a new concatenated string.
     * @param strings
     * @param separator
     * @param skipEmpty
     * @param skipNull
     * @return concatenated string with separator in between elements. 
     */
    public static String join(List<String> strings, String separator, boolean skipEmpty, boolean skipNull) {
        StringBuilder sb = new StringBuilder();
        boolean isAfterFirst = false;
        for (String string : strings) {
            boolean isSkip = (skipNull && string == null) || (skipEmpty && string.isEmpty());
            if (!isSkip) {
                if (isAfterFirst) {
                    sb.append(separator);
                }
                sb.append(string);
                isAfterFirst = true;
            }
        }
        return sb.toString();
    }
}

Related

1. join(String[] strings, char delimiter)
2. join(String[] strings, char delimiter)
3. join(String[] strings, String glue)
4. join(String[] strings, String glue)
5. join(String[] strings, String separator)
6. join(String[] strings, String seperator)
7. join(String[] strParts, String glue)
8. join(String[] strs)
9. join(String[] strs, String glue, int start, int end)