字符串包含问题

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import java.io.*;import java.util.ArrayList;import java.util.List;import java.util.Scanner;/** * Created by ttc on 16-10-31. */public class 练习//{//    public static void main(String[] args) throws IOException//    {//        File file=new File("d:/doubi/db.txt");//        FileReader fr=new FileReader(file);//        BufferedReader br=new BufferedReader(fr);//        String str=null;////        int i =1;//        while((str=br.readLine())!=null)//        {//            System.out.println(i+"."+str);//            i++;//        }////    }//}{    public static void main(String[] args) throws IOException    {        File file = new File("d:");        FileReader fr=new FileReader(file);        BufferedReader br=new BufferedReader(fr);        String str=null;        List<String> li =new ArrayList<String>();        int i=1;        while((str=br.readLine())!=null)        {            li.add(str);        }        System.out.println("请输入单词");        Scanner sc = new Scanner(System.in);        String strword=sc.nextLine();        for(String strTemp:li)        {            boolean b=ContainsStr(strTemp,strword);            if(b)            {                System.out.println(i+"."+strTemp);            }i++;        }    }    public static boolean ContainsStr(String st1,String st2)    {        if(st1.indexOf(st2)>=0)        {           return true;        }else            return true;    }}
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