Creates a reader for reading the specified file. - Java File Path IO

Java examples for File Path IO:Text File

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Description

Creates a reader for reading the specified file.

Demo Code

/*//  ww  w .j  av a2  s . c o  m
 * Copyright 2013 Anton Karmanov
 *
 * 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 com.java2s;
import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import java.io.Reader;
import java.nio.charset.Charset;

public class Main {
    public static void main(String[] argv) throws Exception {
        File file = new File("Main.java");
        System.out.println(openFileReader(file));
    }

    private static final Charset CHARSET = Charset.forName("UTF-8");

    /**
     * Creates a reader for reading the specified file.
     * 
     * @param file the file.
     * @return the reader.
     * @throws IOException if file open operation fails.
     */
    static Reader openFileReader(File file) throws IOException {
        InputStream in = new FileInputStream(file);
        try {
            Reader reader = new InputStreamReader(in, CHARSET);
            in = null;
            return reader;
        } finally {
            if (in != null) {
                //Close the input stream only if Reader construction failed.
                in.close();
            }
        }
    }
}

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