Java String Pad Right rightPad(String str, int size)

Description

right Pad

License

Apache License

Declaration

public static String rightPad(String str, int size) 

Method Source Code

//package com.java2s;
/*/*from ww  w.  j  a  va  2 s.  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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 {
    public static String rightPad(String str, int size) {
        return rightPad(str, size, ' ');
    }

    public static String rightPad(String str, int size, char padChar) {
        if (str == null) {
            return null;
        } else {
            int pads = size - str.length();
            return pads <= 0 ? str
                    : (pads > 8192 ? rightPad(str, size, String.valueOf(padChar))
                            : str.concat(repeat(padChar, pads)));
        }
    }

    public static String rightPad(String str, int size, String padStr) {
        if (str == null) {
            return null;
        } else {
            if (isEmpty(padStr)) {
                padStr = " ";
            }

            int padLen = padStr.length();
            int strLen = str.length();
            int pads = size - strLen;
            if (pads <= 0) {
                return str;
            } else if (padLen == 1 && pads <= 8192) {
                return rightPad(str, size, padStr.charAt(0));
            } else if (pads == padLen) {
                return str.concat(padStr);
            } else if (pads < padLen) {
                return str.concat(padStr.substring(0, pads));
            } else {
                char[] padding = new char[pads];
                char[] padChars = padStr.toCharArray();

                for (int i = 0; i < pads; ++i) {
                    padding[i] = padChars[i % padLen];
                }

                return str.concat(new String(padding));
            }
        }
    }

    public static String repeat(char ch, int repeat) {
        char[] buf = new char[repeat];

        for (int i = repeat - 1; i >= 0; --i) {
            buf[i] = ch;
        }

        return new String(buf);
    }

    public static boolean isEmpty(CharSequence cs) {
        return cs == null || cs.length() == 0;
    }
}

Related

1. rightPad(String srcString, char c, int length)
2. rightPad(String str, int len, char c)
3. rightPad(String str, int length, char padding)
4. rightPad(String str, int max, char pad)
5. rightPad(String str, int num, String padStr)
6. rightPad(String str, int size)
7. rightPad(String str, int size)
8. rightPad(String str, int size)
9. rightPad(String str, int size)