Here you can find the source of toASCII(String str)
public static byte[] toASCII(String str)
//package com.java2s; /*-/*from w ww. j a v a 2 s . c om*/ * * This file is part of Oracle Berkeley DB Java Edition * Copyright (C) 2002, 2015 Oracle and/or its affiliates. All rights reserved. * * Oracle Berkeley DB Java Edition is free software: you can redistribute it * and/or modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, version 3. * * Oracle Berkeley DB Java Edition 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 Affero * General Public License for more details. * * You should have received a copy of the GNU Affero General Public License in * the LICENSE file along with Oracle Berkeley DB Java Edition. If not, see * <http://www.gnu.org/licenses/>. * * An active Oracle commercial licensing agreement for this product * supercedes this license. * * For more information please contact: * * Vice President Legal, Development * Oracle America, Inc. * 5OP-10 * 500 Oracle Parkway * Redwood Shores, CA 94065 * * or * * berkeleydb-info_us@oracle.com * * [This line intentionally left blank.] * [This line intentionally left blank.] * [This line intentionally left blank.] * [This line intentionally left blank.] * [This line intentionally left blank.] * [This line intentionally left blank.] * EOF * */ import java.io.UnsupportedEncodingException; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.CharsetEncoder; import java.nio.charset.CharacterCodingException; public class Main { private final static Charset ASCII = Charset.forName("US-ASCII"); public static byte[] toASCII(String str) { try { return str.getBytes("US-ASCII"); } catch (UnsupportedEncodingException e) { /* Should never happen. */ throw new RuntimeException(e); } } /** * @return a buffer with position set to 0 */ public static ByteBuffer toASCII(CharBuffer chars) { try { final CharsetEncoder asciiEncoder = ASCII.newEncoder(); return asciiEncoder.encode(chars); } catch (CharacterCodingException e) { // Should never happen. throw new RuntimeException(e); } } }