关于一个小题
这是一个在Eclipse上调试的控制台小程序,是个简单的通讯录,数据用记事本记录,两行为一个条目Entry,一行存名字下一行存号码,便于的测试,我直接将读取制定为“zxh.txt”,我调试的读取没错,就是到我用星号标记的那句有问题,entries没add成,检查是空的,我也弄不清什么问题,可能是别的错误吧,望有人不吝赐教
import java.io.*;
import java.util.Vector;
class TelephoneBook {
public static TelephoneBook read(String fileName) throws Exception{
TelephoneBook tb=new TelephoneBook();
BufferedReader br=new BufferedReader(new InputStreamReader
(new FileInputStream("zxh.txt")));
Entry e=Entry.read(br);
while(e !=null){
******** tb.entries.add(e); *******
e=Entry.read(br);
}
return tb;
}
public String lookup(String data) throws FileNotFoundException{
String digits="0123456789";
String result = null;
String firstChar=data.substring(0,1);
int position=digits.indexOf(firstChar);
for(int i=0;i<entries.size();i++){
Entry e=(Entry)entries.elementAt(i);
if(position<0){
if(data.equals(e.getName()));
result=e.getName();
System.out.println(e.getName());
}
else{
if(data.equals(e.getNumber()));
result=e.getNumber();
System.out.println(e.getNumber());
}
}
return result;
}
private Vector<Entry> entries;
}
////////////
import java.io.BufferedReader;
import java.io.IOException;
class Entry {
public Entry(String name, String number) {
this.name=name;
this.number=number;
}
public static Entry read(BufferedReader br) throws IOException{
String name=br.readLine();
if(name==null)
return null;
String number=br.readLine();
return new Entry(name,number);
}
public String getName() {
return name;
}
public String getNumber() {
return number;
}
private String name,number;
}
////////////////
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class text {
public static void main(String[] args) throws Exception{
BufferedReader keyboard=new BufferedReader(new InputStreamReader(System.in));
System.out.println("please name");
String name=keyboard.readLine();
TelephoneBook tb=TelephoneBook.read(name);
System.out.println("please data");
String data=keyboard.readLine();
tb.lookup(data);
}
}