FastAsyncWorldEdit/src/main/java/com/sk89q/util/StringUtil.java

167 Zeilen
4.6 KiB
Java

// $Id$
/*
* Copyright (C) 2010 sk89q <http://www.sk89q.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.util;
import java.util.Collection;
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/**
* String utilities.
*
* @author sk89q
*/
public class StringUtil {
/**
* Trim a string if it is longer than a certain length.
*
* @param str
* @param len
* @return
*/
public static String trimLength(String str, int len) {
if (str.length() > len) {
return str.substring(0, len);
}
return str;
}
/**
* Join an array of strings into a string.
*
* @param str
* @param delimiter
* @param initialIndex
* @return
*/
public static String joinString(String[] str, String delimiter,
int initialIndex) {
if (str.length == 0) {
return "";
}
StringBuilder buffer = new StringBuilder(str[initialIndex]);
for (int i = initialIndex + 1; i < str.length; i++) {
buffer.append(delimiter).append(str[i]);
}
return buffer.toString();
}
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/**
* Join an array of strings into a string.
*
* @param str
* @param delimiter
* @param initialIndex
* @param quote
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* @return
*/
public static String joinQuotedString(String[] str, String delimiter,
int initialIndex, String quote) {
if (str.length == 0) {
return "";
}
StringBuilder buffer = new StringBuilder();
buffer.append(quote);
buffer.append(str[initialIndex]);
buffer.append(quote);
for (int i = initialIndex + 1; i < str.length; i++) {
buffer.append(delimiter).append(quote).append(str[i]).append(quote);
}
return buffer.toString();
}
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/**
* Join an array of strings into a string.
*
* @param str
* @param delimiter
* @return
*/
public static String joinString(String[] str, String delimiter) {
return joinString(str, delimiter, 0);
}
/**
* Join an array of strings into a string.
*
* @param str
* @param delimiter
* @param initialIndex
* @return
*/
public static String joinString(Object[] str, String delimiter,
int initialIndex) {
if (str.length == 0) {
return "";
}
StringBuilder buffer = new StringBuilder(str[initialIndex].toString());
for (int i = initialIndex + 1; i < str.length; i++) {
buffer.append(delimiter).append(str[i].toString());
}
return buffer.toString();
}
/**
* Join an array of strings into a string.
*
* @param str
* @param delimiter
* @param initialIndex
* @return
*/
public static String joinString(int[] str, String delimiter,
int initialIndex) {
if (str.length == 0) {
return "";
}
StringBuilder buffer = new StringBuilder(Integer.toString(str[initialIndex]));
for (int i = initialIndex + 1; i < str.length; i++) {
buffer.append(delimiter).append(Integer.toString(str[i]));
}
return buffer.toString();
}
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/**
* Join an list of strings into a string.
*
* @param str
* @param delimiter
* @param initialIndex
* @return
*/
public static String joinString(Collection<?> str, String delimiter,
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int initialIndex) {
if (str.size() == 0) {
return "";
}
StringBuilder buffer = new StringBuilder();
int i = 0;
for (Object o : str) {
if (i >= initialIndex) {
if (i > 0) {
buffer.append(delimiter);
}
buffer.append(o.toString());
}
i++;
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}
return buffer.toString();
}
}