StringUtil.java

/*
 * Copyright 2012 Takao Nakaguchi
 *
 * 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 org.trie4j.util;

import java.io.UnsupportedEncodingException;

public class StringUtil {
	public static byte[] toUTF8(String str){
		try {
			return str.getBytes(utf8);
		} catch (UnsupportedEncodingException e) {
			throw new RuntimeException(e);
		}
	}

	public static String fromUTF8(byte[] bytes){
		try {
			return new String(bytes, utf8);
		} catch (UnsupportedEncodingException e) {
			throw new RuntimeException(e);
		}
	}

	public static String fromUTF8(byte[] bytes, int offset, int length){
		try {
			return new String(bytes, offset, length, utf8);
		} catch (UnsupportedEncodingException e) {
			throw new RuntimeException(e);
		}
	}

	public static String repeted(String str, int count){
		StringBuilder b = new StringBuilder();
		for(int i = 0; i < count; i++) b.append(str);
		return b.toString();
	}

	private static final String utf8 = "UTF8";
}