Join path segments with separator. - Java File Path IO

Java examples for File Path IO:Path

  1. HOME
  2. Java
  3. File Path IO
  4. Path

Description

Join path segments with separator.

Demo Code

/*//from  w  ww  . j av a  2 s.  c om
 * Copyright 2013 Hewlett-Packard Development Company, L.P
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

public class Main {
    /**
     * Join path segments with separator.
     * <p>
     *
     * If path segment already contains separator on either side of the connecting point it is not duplicated.
     * <p>
     *
     * Examples:
     * pathJoin("/", "a", "b")  ... "a/b"
     * pathJoin("/", "a/", "/b")  ... "a/b"
     * pathJoin("/", "a/", "b/")  ... "a/b/"
     * pathJoin("/")  ... ""
     * pathJoin("/", "a")  ... "a"
     * pathJoin("/", "/a/")  ... "/a/"
     *
     * @param separator segment separator
     * @param parts path segments
     * @return resulting path
     */
    public static String pathJoin(String separator, String... parts) {
        StringBuilder builder = new StringBuilder();
        if (parts.length == 0)
            return "";
        if (parts.length == 1)
            return parts[0];
        for (int i = 0; i < parts.length; i++) {
            String part = parts[i];
            if (i == 0) {
                builder.append(removeEnd(part, separator))
                        .append(separator);
            } else if (i == parts.length - 1) {
                builder.append(removeStart(part, separator));
            } else {
                builder.append(
                        removeStart(removeEnd(part, separator), separator))
                        .append(separator);
            }
        }
        return builder.toString();
    }

    public static String removeEnd(String str, String remove) {
        if (str.endsWith(remove)) {
            return str.substring(0, str.length() - remove.length());
        } else {
            return str;
        }
    }

    public static String removeStart(String str, String remove) {
        if (str.startsWith(remove)) {
            return str.substring(remove.length());
        } else {
            return str;
        }
    }
}

Related Tutorials