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RandomNameGenerator.java
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RandomNameGenerator.java
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import java.io.*;
import java.util.*;
public class RandomNameGenerator {
List<String> names;
List<String> surnames;
Random random;
public RandomNameGenerator(String nameFilePath, String surnameFilePath, Random random) {
initNames(nameFilePath);
initSurnames(surnameFilePath);
initRandom(random);
}
private void initNames(String nameFilePath) {
File nameFile = new File(nameFilePath);
names = fileToList(nameFile);
}
private void initSurnames(String surnameFilePath) {
File surnameFile = new File(surnameFilePath);
surnames = fileToList(surnameFile);
}
private List<String> fileToList(File file) {
List<String> list = new ArrayList<String>();
FileReader fileReader = null;
BufferedReader in = null;
try {
fileReader = new FileReader(file);
in = new BufferedReader(fileReader);
// fill array with file data
String line;
while ((line = in.readLine()) != null)
list.add(line);
} catch(IOException ioe) {
throw new RuntimeException(ioe);
} finally {
if (in != null) {
try {
in.close();
} catch(IOException ioe) {
// ignore
}
}
}
return list;
}
private void initRandom(Random random) {
this.random = random;
}
/** Generate a random name */
public String nextName() {
int i = random.nextInt(names.size());
int j = random.nextInt(surnames.size());
return names.get(i) + " " + surnames.get(j);
}
// Main test
public static void main(String[] args) throws Exception {
if (args.length < 3) {
System.err.println("usage: " + RandomNameGenerator.class.getSimpleName() + " <names> <surnames> <number>");
return;
}
final String namesPath = args[0];
final String surnamesPath = args[1];
final int number = Integer.parseInt(args[2]);
if (number <= 0)
throw new IllegalArgumentException("Number must be positive!");
RandomNameGenerator rng = new RandomNameGenerator(namesPath, surnamesPath, new Random());
for(int i=0; i < number; i++) {
System.out.println(rng.nextName());
}
}
}