测试大文件_JAVA_编程开发_程序员俱乐部

class="java">import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class BigFileTester {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		int cap = 4 * 1024 * 1024;
		long start = System.currentTimeMillis();
		RandomAccessFile r = new RandomAccessFile("D:\\test.txt", "rw");
		r.setLength(cap);
		r.close();
		long duration = System.currentTimeMillis() - start;

		System.out.println(duration + " ms");
	}

}