Java Path Create nio createDirectory(final Path parent, final String folderName)

Description

Creates a new directory with the given parent folder and folder name.

License

Open Source License

Parameter

Parameter	Description
parent	the path of the parent folder.
folderName	the name of the folder.

Return

the path to the new directory.

Declaration

public static Path createDirectory(final Path parent, final String folderName) 

Method Source Code

//package com.java2s;
/**/*w  w w . j  a v  a  2  s  . co  m*/
 * Copyright (c) 2016 NumberFour AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   NumberFour AG - Initial API and implementation
 */

import static com.google.common.base.Preconditions.checkNotNull;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

public class Main {
    /**
     * Creates a new directory with the given parent folder and folder name. The newly created folder will be deleted on
     * graceful VM shutdown.
     *
     * @param parent
     *            the path of the parent folder.
     * @param folderName
     *            the name of the folder.
     * @return the path to the new directory.
     */
    public static Path createDirectory(final Path parent, final String folderName) {
        final File file = new File(parent.toFile(), folderName);
        if (!file.exists()) {
            if (!file.mkdir()) {
                throw new RuntimeException(
                        "Error while trying to create folder at " + parent + " with " + folderName + ".");
            }
        }
        file.deleteOnExit();
        return file.toPath();
    }

    /**
     * Creates a new temp directory with the given parent. The newly created folder will be deleted on graceful VM
     * shutdown.
     *
     * @param parent
     *            the path of the parent folder.
     * @return the path to the new directory.
     */
    public static Path createDirectory(final Path parent) {
        File file;
        try {
            file = Files.createTempDirectory(parent, null).toFile();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        if (!file.exists()) {
            throw new RuntimeException("Error while trying to create folder at " + parent + ".");
        }
        file.deleteOnExit();
        return file.toPath();
    }

    /**
     * Creates a new temp directory in the java temp folder. The newly created folder will be deleted on graceful VM
     * shutdown.
     *
     * @return the path to the new directory.
     */
    public static Path createTempDirectory() {
        final File parent = new File(getTempDirValue());
        if (!parent.exists() || !parent.canWrite()) {
            throw new RuntimeException("Cannot access temporary directory under: " + getTempDirValue());
        }
        File child;
        try {
            child = Files.createTempDirectory(parent.toPath(), null).toFile();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        if (!child.exists()) {
            throw new RuntimeException("Error while trying to create folder at " + parent + ".");
        }
        child.deleteOnExit();
        return child.toPath();
    }

    /**
     * Returns with the value of {@code System.getProperty("java.io.tmpdir")}. Never {@code null}.
     */
    private static final String getTempDirValue() {
        return checkNotNull(System.getProperty("java.io.tmpdir"), "Null for java.io.tmpdir system property.");
    }
}

Related

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2. createChecksums(final Path file, final Map functions)
3. createClassWithDepsNextExtra(int index, Path dir)
4. createDir(Path p)
5. createDirectoriesIfRequired(@Nonnull Path path)
6. createDirectory(Path parent, String name)
7. createDirectory(Path path)
8. createDirIfDoesNotExist(String websitesDirPath)
9. createEmptyResourceFile(Path path)