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

Description

Right pad a String with spaces.

License

Apache License

Parameter

Parameter	Description
str	String to repeat
size	int number of times to repeat

Exception

Parameter	Description
NullPointerException	if str is null

Return

right padded String

Declaration

public static String rightPad(String str, int size) 

Method Source Code

//package com.java2s;
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved./*from  w ww . j  a  v a 2  s  .  co  m*/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 *
 * This software consists of voluntary contributions made by many
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 * information on the Apache Software Foundation, please see
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 */

public class Main {
    /**
     * Right pad a String with spaces. Pad to a size of n.
     * 
     * @param str  String to repeat
     * @param size  int number of times to repeat
     * @return right padded String
     * @throws NullPointerException if str is null
     */
    public static String rightPad(String str, int size) {
        return rightPad(str, size, " ");
    }

    /**
     * Right pad a String with a specified string. Pad to a size of n.
     *
     * @param str  String to pad out
     * @param size  int size to pad to
     * @param delim  String to pad with
     * @return right padded String
     * @throws NullPointerException if str or delim is null
     * @throws ArithmeticException if delim is the empty string
     */
    public static String rightPad(String str, int size, String delim) {
        size = (size - str.length()) / delim.length();
        if (size > 0) {
            str += repeat(delim, size);
        }
        return str;
    }

    /**
     * Repeat a string n times to form a new string.
     *
     * @param str  String to repeat
     * @param repeat  int number of times to repeat
     * @return String with repeated string
     * @throws NegativeArraySizeException if repeat < 0
     * @throws NullPointerException if str is null
     */
    public static String repeat(String str, int repeat) {
        StringBuffer buffer = new StringBuffer(repeat * str.length());
        for (int i = 0; i < repeat; i++) {
            buffer.append(str);
        }
        return buffer.toString();
    }
}

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