Java String Sub String substring(String text, int startPos, int len)

Description

Perform "substring" using start position and length.

License

Apache License

Parameter

Parameter	Description
text	Text.
startPos	Start position.
len	Length.

Return

Substring.

Declaration

private static String substring(String text, int startPos, int len) 

Method Source Code

//package com.java2s;
/*//from ww  w  .  jav a  2s  .  c  o m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

public class Main {
    /**
     * Perform "substring" using start position and length.
     *
     * @param text Text.
     * @param startPos Start position.
     * @param len Length.
     * @return Substring.
     */
    private static String substring(String text, int startPos, int len) {
        assert validSubstring(text, startPos, len);

        return text.substring(startPos, startPos + len);
    }

    /**
     * Check whether substring is valid.
     *
     * @param text Substring.
     * @param startPos Start position.
     * @param len Length.
     * @return {@code True} if valid.
     */
    private static boolean validSubstring(String text, int startPos, int len) {
        return text != null && startPos + len <= text.length();
    }
}

Related

1. subString(String string, String inizio, String fine)
2. substring(String subject, int start, int end)
3. substring(String text, int begin, int end)
4. substring(String text, int start, int end)
5. substring(String text, int startPos, int endPos)
6. subString(String text, String leadingPart)
7. subString(String val, int start, int end)
8. SubString(String x, long y)
9. substring(StringBuffer buf, int start, int lim)