主方法类：
packagecom.cdut;
importjava.io.FileWriter;
public classMain {
public static voidmain(String[] args)throwsException {
FileWriter ra =newFileWriter("a.text");
ra.write("a\nc\ne\ng\n");
ra.close();
FileWriter rb =newFileWriter("b.text");
rb.write("b\nd f h");
rb.close();
FileManager a =newFileManager("a.text",new char[]{'\n'});
FileManager b =newFileManager("b.text",new char[]{'\n',' '});
FileWriter rc =newFileWriter("c.text");
String aWord =null;
String bWord =null;
while((aWord=a.nextWord())!=null){
rc.write(aWord);
bWord = b.nextWord();
if(bWord !=null){
rc.write(bWord);
}
}
while((bWord=b.nextWord())!=null){
rc.write(bWord);
}
rc.close();
}
}
FileManager类：
packagecom.cdut;
importjava.io.File;
importjava.io.FileReader;
/**
* FileManager的作用：读取文件中的字符流，将启转换成String数组，并给出遍历方法：
*nextWord()
*/
public classFileManager {
String[]words=null;
intpos=0;//words的下标
//seperator为分隔符
publicFileManager(String fileName,char[] seperators)throwsException{
File file =newFile(fileName);
FileReader reader =newFileReader(file);
char[] buf =new char[(int)(file.length())];
intlen = reader.read(buf);
String result =newString(buf,0, len);
String regex =null;//正则表达式
if(seperators.length>1){
regex =""+seperators[0]+"|"+seperators[1];
}else{
regex =""+seperators[0];
}
words= result.split(regex);
reader.close();
}
publicString nextWord(){
if(pos==words.length){
return null;
}
returnwords[pos++];
}
}
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