writeunbufferedtest.java

来自「java编程开发技巧与实例的编译测试通过的所有例程」· Java 代码 · 共 50 行

import java.io.*;

public class WriteUnbufferedTest
{
	//no buffered
	public static void main(String args[])
	{
		try
		{
			long start	=	System.currentTimeMillis();
			FileOutputStream fs_out	=	new FileOutputStream("sample.dat");
			DataOutputStream out	=	new DataOutputStream(fs_out);
			for (int i = 0; i < 1000000; i ++)
				out.writeDouble(Math.random());
			out.close();
			long stop	=	System.currentTimeMillis();
			System.out.print("Time passed: " + (stop - start));
		}
		catch	(IOException ioe)
		{
			System.out.println(ioe);
		}
	}
}

/*
public class WriteUnbufferedTest
{
	//use buffered
	public static void main(String args[])
	{
		try
		{
			long start	=	System.currentTimeMillis();
			FileOutputStream fs_out	=	new FileOutputStream("sample.dat");
			BufferedOutputStream	bfs_out	=	new BufferedOutputStream(fs_out);
			DataOutputStream		out		=	new DataOutputStream(bfs_out);
			for (int i = 0; i < 1000000; i ++)
				out.writeDouble(Math.random());
			out.close();
			long stop	=	System.currentTimeMillis();
			System.out.print("Time passed: " + (stop - start));
		}
		catch	(IOException ioe)
		{
			System.out.println(ioe);
		}
	}
}
*/