使用RandomAccessFile产生固定大小文件
package io;import java.io.FileNotFoundException;import java.io.IOException;import java.io.RandomAccessFile;public class BigFileTester {public static void main(String[] args) throws FileNotFoundException, IOException {int cap = 3*1024*1024;long start2 = System.currentTimeMillis();RandomAccessFile r = new RandomAccessFile("C:\\test2.txt", "rw");r.setLength(cap);r.close();long duration2 = System.currentTimeMillis() - start2;System.out.println(duration2);}}
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