create Files with Lambda Stream - Java File Path IO

Java examples for File Path IO:File Stream

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Description

create Files with Lambda Stream

Demo Code

/*/*w  w w. jav a  2s . c o m*/
     * Copyright 2016 peter.
     *
     * 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.
     */
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.URI;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.Arrays;
import java.util.List;
import java.util.stream.IntStream;

public class Main{
    public static void createFiles(Path parent, String prefix, int count)
                throws IOException {
            createFiles(parent, prefix, count, ".txt");
        }
    public static void createFiles(Path parent, String prefix, int count,
                String suffix) throws IOException {
            createFiles(parent, prefix, 0, count, suffix);
        }
    public static void createFiles( Path parent, String prefix, int start, int end, String suffix )
        throws IOException
    {
        IntStream.range( start, end )
                .mapToObj( i -> prefix + i + suffix )
                .map( parent::resolve )
                .forEach( CommonTestUtils::write );
    }
    private static final List<String> BODY = Arrays.asList("test\n");

    public static void write(URI uri) throws IOException {
        write(Paths.get(uri));
    }

    public static void write(Path p) {
        try {
            Files.write(p, BODY, StandardOpenOption.CREATE,
                    StandardOpenOption.WRITE);
        } catch (IOException ex) {
            throw new UncheckedIOException(ex);
        }
    }    
}

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