Question

编写一个java程序，将a.txt文件中的单词与b.txt文件中的单词交替合并到c.txt文件中。

Answer 1

import java.io.File;import java.io.FileReader;import java.io.FileWriter; public class MainClass{ public static void main(String[] args) throws Exception{ FileManager a = new FileManager("a.txt",new char[]{'\n'}); FileManager b = new FileManager("b.txt",new char[]{'\n',' '}); FileWriter c = new FileWriter("c.txt"); String aWord = null; String bWord = null; while((aWord = a.nextWord()) !=null ){ c.write(aWord + "\n"); bWord = b.nextWord(); if(bWord != null) c.write(bWord + "\n"); } while((bWord = b.nextWord()) != null){ c.write(bWord + "\n"); } c.close(); } } class FileManager{ String[] words = null; int pos = 0; public FileManager(String filename,char[] seperators) throws Exception{ File f = new File(filename); FileReader reader = new FileReader(f); char[] buf = new char[(int)f.length()]; int len = reader.read(buf); String results = new String(buf,0,len); String regex = null; if(seperators.length >1 ){ regex = "" + seperators[0] + "|" + seperators[1]; }else{ regex = "" + seperators[0]; } words = results.split(regex); } public String nextWord(){ if(pos == words.length) return null; return words[pos++]; } }

Answer 2

可以采用多线程啊。用线程线程A向C.txt里写a.txt读取的单词。线程B向C.txt里写b.txt读取的单词.并且只有当A执行一次后才可以执行B，这样就可以交替运行了、、