package test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Random;
import java.util.Scanner;

import org.junit.Test;

public class RandomInputTest {

	@Test
	public void testPW() {
		String FileName = "d:/test.txt";
		int count = 1000 * 10000;
		PrintWriter pw = null;
		try {
			pw = new PrintWriter(FileName);
			for (int i = 0; i < count; i++) {
				pw.println(new Random().nextInt(100000));
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			pw.close();
		}
	}

	@Test
	public void testBufferedRead() {
		String FileName = "d:/test.txt";
		BufferedReader br = null;
		try {
			br = new BufferedReader(new FileReader(new File(FileName)));
			while (br.readLine() != null) {
			}
			;

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				br.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	@Test
	public void testScanner() {
		String FileName = "d:/test.txt";
		Scanner scanner = null;
		try {
			scanner = new Scanner(new File(FileName));
			while (scanner.hasNextLine()) {
				scanner.nextLine();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			scanner.close();
		}
	}

	@Test
	public void testBW() throws IOException {
		FileWriter FileName = new FileWriter("d:/test.txt"); 
		int count = 1000 * 10000;
//		 BW
		BufferedWriter bw = null;
		try {
			bw = new BufferedWriter(FileName);
			for (int i = 0; i < count; i++) {
				bw.write(new Random().nextInt(100000));
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				bw.close();
			} catch (NullPointerException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}