load Int Array From File - Java java.io

Java examples for java.io:InputStream Read

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Description

load Int Array From File

Demo Code

/*******************************************************************************
 * Copyright 2012 Geoscience Australia/*from  ww w.  jav a  2 s.  com*/
 * 
 * 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.DataInputStream;

import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;

public class Main {
    public static int[] loadIntArrayFromFile(File file) {
        if (!file.exists()) {
            return null;
        }

        int size = (int) (file.length() / 4l);
        DataInputStream dis = null;
        try {
            dis = new DataInputStream(new FileInputStream(file));
            int[] array = new int[size];
            for (int i = 0; i < size; i++) {
                array[i] = dis.readInt();
            }
            return array;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                dis.close();
            } catch (IOException e) {
            }
        }
        return null;
    }
}

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