Java实验9 T1.往文件中写入1万个随机数，比较用时的多少

题目要求

分别使用FileWriter 和 BufferedWriter 往文件中写入1万个随机数，比较用时的多少？(用时采用方法System.currentTimeMillis()）求时间差;

FileWriter

import java.io.FileOutputStream;
import java.io.IOException;

public class Test1 {
	public static void main(String[] args) throws IOException {
		FileOutputStream output = new FileOutputStream("temp.dat");
		long start = System.currentTimeMillis();
		for (int i = 0; i < 10000; i++) {
			output.write((int) (Math.random()*10));
		}
		long stop = System.currentTimeMillis();
		long time = stop-start;
		System.out.println("时间差为："+ time +"毫秒");
	}
}

BufferedWriter

import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Test1 {
	public static void main(String[] args) throws IOException {
		BufferedOutputStream bouput = new BufferedOutputStream(
				new FileOutputStream("temp2.dat"));
		long start2 = System.currentTimeMillis();
		for (int i = 0; i < 10000; i++) {
			bouput.write((int) (Math.random()*10));
		}
		long stop2 = System.currentTimeMillis();
		long time2 = stop2-start2;
		System.out.println("BufferedWriter的时间差为："+ time2 +" 毫秒");
	}
} 

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