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71 lines
1.6 KiB
71 lines
1.6 KiB
import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileWriter;
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import java.math.*;
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/**
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* Simple class to generate random data for
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* file IO tests.
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*
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* @author Jeffery Russell 1-31-19
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*/
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public class DataCreator
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{
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/**
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* Generates an obscure random character
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* @return
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*/
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private static char rndChar()
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{
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// or use Random or whatever
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int rnd = (int) (Math.random() * 52);
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char base = (rnd < 26) ? 'A' : 'a';
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return (char) (base + rnd % 26);
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}
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/**
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* Simple function to save contents to the disk
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*
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* @param s
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* @param fileName
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*/
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private static void saveToDisk(String s, String fileName)
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{
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BufferedWriter writer;
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try
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{
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File file = new File(fileName);
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file.createNewFile();
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writer = new BufferedWriter(new FileWriter(file));
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writer.write(s);
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writer.flush();
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writer.close();
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}
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catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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/**
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* Creates 5MB of random test data to use
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*/
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public static void main(String[] arguments)
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{
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System.out.println("Creating Test Files");
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for(int i = 0; i < 100; i++)
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{
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//10k random characters for each file
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//each file is 10kb * 500 files, total size of 5MB
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String s = "";
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for(int j = 0; j < 1000000; j++)
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{
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s = s + rndChar();
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}
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saveToDisk(s, "./testData/" + i + ".txt");
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System.out.println(s);
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}
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}
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}
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