一道java题 多谢了

//时间有限，未做验证和细节处理，见谅
import java.io.*;

public class Test1{

private String getInput(){
BufferedReader br = new BufferedReader(
new InputStreamReader(System.in));
String str = "";
try {
str = br.readLine();
if(!("".equals(str.trim()))) return str;
}
catch (Exception ex) {
ex.printStackTrace();
}
return null;
}

private void writeFile(String file,String[] url){
try {
FileWriter fr = new FileWriter(file);
BufferedWriter br = new BufferedWriter(fr);
for (int i = 0; i<url.length; i++) {
br.write(url[i]);
br.newLine();
}
br.flush();
br.close();
fr.close();
System.out.println ("The file has been created.");
}
catch (Exception ex) {
ex.printStackTrace();
}
}

pr