95 lines
5.4 KiB
HTML
95 lines
5.4 KiB
HTML
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<table width="100%"><tr><td align="center">/home/caleb/ASDV-Java/Semester 3/Assignments/MP5-Binary-Files_CalebFontenot/src/com/calebfontenot/mp5/files_calebfontenot/Exercise17_03.java</td></tr></table>
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<pre>
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<span class="comment">/*</span>
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<span class="comment"> * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license</span>
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<span class="comment"> * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template</span>
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<span class="comment"> */</span>
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<span class="literal">package</span> com.calebfontenot.mp5.files_calebfontenot;
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<span class="literal">import</span> java.io.DataInputStream;
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<span class="literal">import</span> java.io.DataOutputStream;
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<span class="literal">import</span> java.io.FileInputStream;
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<span class="literal">import</span> java.io.FileOutputStream;
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<span class="literal">import</span> java.io.IOException;
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<span class="comment">/**</span>
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<span class="comment"> *</span>
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<span class="comment"> * </span><span class="comment">@author</span> <span class="comment">caleb</span>
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<span class="comment">*/</span>
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<span class="literal">public</span> <span class="literal">class</span> Exercise17_03 {
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<span class="literal">static</span> <span class="literal">int</span> fileSize = Math.abs((<span class="literal">int</span>) (Math.random() * <span class="number">1024</span>));
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> writeData()
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{
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<span class="literal">try</span> (FileOutputStream fileWrite = <span class="literal">new</span> FileOutputStream(<span class="string">"</span><span class="string">Exercise17_03.dat</span><span class="string">"</span>)) {
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<span class="comment">// Write a unspecified number of integers into the file.</span>
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<span class="comment">// Must be positive!</span>
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<span class="literal">int</span> randInt = <span class="number">0</span>;
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<span class="literal">for</span> (<span class="literal">int</span> i = <span class="number">0</span>; i < fileSize; ++i) {
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randInt = (<span class="literal">int</span>) (Math.random() * <span class="number">10</span>);
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fileWrite.write(randInt);
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}
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} <span class="literal">catch</span> (IOException ex) {
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System.out.println(ex);
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}
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System.out.println(<span class="string">"</span><span class="string">Wrote data to the file!</span><span class="string">"</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span>[] readData()
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{
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<span class="literal">int</span>[] fileData = <span class="literal">new</span> <span class="literal">int</span>[fileSize];
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<span class="literal">try</span> (FileInputStream fileRead = <span class="literal">new</span> FileInputStream(<span class="string">"</span><span class="string">Exercise17_03.dat</span><span class="string">"</span>)) {
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<span class="comment">// Read the data back</span>
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<span class="literal">int</span> dataIterator = <span class="number">0</span>;
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<span class="literal">int</span> dataStream = <span class="number">0</span>;
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<span class="literal">while</span> (fileRead.available() > <span class="number">0</span>) {
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dataStream = fileRead.read();
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fileData[dataIterator++] = dataStream;
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System.out.print(dataStream + <span class="string">"</span> <span class="string">"</span>);
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<span class="literal">if</span> ((dataIterator + <span class="number">1</span>) % <span class="number">10</span> == <span class="number">0</span>) {
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System.out.println();
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}
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}
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} <span class="literal">catch</span> (IOException ex) {
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System.out.println(ex);
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}
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<span class="literal">return</span> fileData;
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> main(String[] args)
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{
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System.out.println(<span class="string">"</span><span class="string">Ints to write: </span><span class="string">"</span> + fileSize);
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writeData();
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<span class="literal">int</span>[] fileData = readData();
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<span class="comment">// Sum the digits</span>
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<span class="literal">int</span> sum = <span class="number">0</span>;
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<span class="literal">for</span> (<span class="literal">int</span> i: fileData) {
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sum += i;
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}
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System.out.println(<span class="string">"</span><span class="literal">\n</span><span class="string">The sum of the integers in the file is: </span><span class="string">"</span> + sum);
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}
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}
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</pre></body>
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