JAVA 读取六级单词内容并加进数组

java笔记
上次课的作业更改后

//读取六级单词内容并加进数组
import java.io.*;
import java.util.*;
public class ReadWords {
    public static void main(String[] args) throws Exception {
        FileReader sf= new FileReader("六级词库副本.txt");
        BufferedReader br = new BufferedReader(sf);
        List<String> ewords=new ArrayList<String>();
        List<String> cwords=new ArrayList<String>();
        while(true){
            String s=br.readLine();
            if(s!=null){
                if(s.startsWith("[ "))
                    cwords.add(br.readLine());
                else if(s.trim().length()!=0)
                    ewords.add(s);
            }
            else 
                break;
        }
        //System.out.println(ewords.get(0)+"\t"+cwords.get(0));
        BufferedReader kr=new BufferedReader(new InputStreamReader(System.in));
        while(true){
            int i=(int)(Math.random()*ewords.size());
            System.out.println(cwords.get(i));
            System.out.print(":");
            String s=kr.readLine();
            if(s.equals(ewords.get(i)))
                System.out.println("OK!");
            else 
                System.out.println("error:"+ewords.get(i));
            System.out.print("continue?(y/n)");
            if(kr.readLine().equals("n"))
                break;
        }
    }
    public static void main2(String[] args) throws Exception {
        FileReader sf= new FileReader("六级.txt");
        BufferedReader br = new BufferedReader(sf);
        List<String> al=new ArrayList<String>();
        while(true){
            String s=br.readLine();
            if(s!=null)
                al.add(s);
            else {
                break;
            }
        }
        System.out.println(al.contains("adhere"));
        System.out.println(al.get(10));
        System.out.println(al.get(11));
        al.remove(10);
        System.out.println(al.get(10));
        al.clear();
        System.out.println(al.size());
    }
//读取六级单词内容并加入数组里
    public static void main1(String[] args) {
        try {
            int i= 0;
            FileReader s = new FileReader("六级.txt");
            BufferedReader br = new BufferedReader(s);
            String[] words= new String[9000];
            while (true) {
                    words[i] = br.readLine();
                    if (words[i]==null)
                        break;
                    i++;
            }
            s.close();
            System.out.println(i);
            System.out.println(words[(int)(i*Math.random())]);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}