Java Text File Write nio writeString(DataOutput dOut, String value)

Description

Writes out value to dOut.

License

Apache License

Parameter

Parameter	Description
dOut	a parameter
value	a parameter

Exception

Parameter	Description
IOException	an exception

Declaration

public static void writeString(DataOutput dOut, String value) throws IOException 

Method Source Code

//package com.java2s;
/**/*from ww  w .  j ava 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
 *
 *      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.
 */

import java.io.DataOutput;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class Main {
    private static final String DATA_VERSION = "V==1";
    private static final int CONVERSION_TRESHOLD = 60000;

    /**
     * Writes out value to dOut. Converts it to byte array if the length of the UTF-8 byte array representation of the
     * string is longer than 60k bytes.
     *
     * @param dOut
     * @param value
     * @throws IOException
     */
    public static void writeString(DataOutput dOut, String value) throws IOException {
        if (value == null) {
            dOut.writeUTF(value);
            return;
        }

        byte[] data = value.getBytes(StandardCharsets.UTF_8.name());
        if (data.length > CONVERSION_TRESHOLD) {
            dOut.writeUTF(DATA_VERSION);
            dOut.writeInt(data.length);
            dOut.write(data);
        } else {
            dOut.writeUTF(value);
        }
    }
}

Related

1. writeLines(Collection lines, File file)
2. writeLines(File file, Iterable lines)
3. writeLines(String fileName, String[] lines)
4. writeLinesToFile(final File file, final String... lines)
5. writeString(DataOutput dataOutput, String string)
6. writeString(File file, String content)
7. writeString(final File file, final String str)
8. writeString(OutputStream buffer, String s)
9. writeStringToFile(File file, String content, String value)