file

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;// importing all the classes in util package class task

public class Assignment3 {

    public static void main(String[] args) throws FileNotFoundException {
        Scanner str = new Scanner(System.in);
        System.out.println("Enter the Team Name:");
        System.out.println("-->");
        String teamName= str.next();
        int st=0;

      //initiation of all the variables
        String HomeTeam ="";
        String awayTeam="";
        int homeScore=0;
        int awayScore=0;
        String error="";

           Scanner filename = new Scanner(System.in);//a Scanner object for input is created Scanner Yo = new Scanner(System.in);
        System.out.println("enter the file name with file extension:");
        System.out.print("-->");
        String textfilename= filename.next();


        //bufferreader object for reading file
 BufferedReader br = new BufferedReader(new FileReader(textfilename));
         //the title of table
         System.out.println("HomeTeam\tAwayTeam\tHome-Score\tAway-Score");

       //variables for scanning a line of string
        String readLine = null;
            try {
                //reading line to the end of file
        while((readLine = br.readLine()) != null){
            long count = readLine.chars().filter(ch -> ch == ':').count();//count the delimeter
            if(count<3) { //if it is less then 3 program is paused

                error="the match.txt is not a valid file or some charecter is missing from file";
                break;
            }

            String [] game = readLine.split(":"); //spliting the line using delimiter
            //storing the text data to program variables
            HomeTeam=game[0];
            if(HomeTeam.length()==0){//if length is 0 it means it is empty ,this program will be halted

                error="Home team name may be missing ";
                break;
            }

            awayTeam=game[1];
            if(awayTeam.length()==0){//if length is 0 it means it is empty ,this program will be halted

                error="Away team name may be missing ";
                break;
            }
            if(game[2].length()==0){//if length is 0 it means it is empty ,this program will be halted

                error="Home Team Score May be Missing";
                break;
            }
            try{
            homeScore=Integer.parseInt(game[2]);//parsing to integer form, if failed while parsing program is exit
            }catch(NumberFormatException ex){

                System.out.println("The Home Team Score is not a valid Integer ");
                break;
            }
            if(game[2].length()==0){//if length is 0 it means it is empty ,this program will be halted

                error="Away Team Score May be Missing";
                break;
            }
            try{
             awayScore=Integer.parseInt(game[3]);//parsing to integer form, if failed while parsing program is exit

            }catch(NumberFormatException ex){

                System.out.println("The Away Team Score is not a valid Integer ");
                break;
            }
            //the outputs
            if(teamName.equals(HomeTeam)){
                System.out.print(HomeTeam);
                System.out.println("\t"+"\t"+homeScore);
                st=1;
            }else if(teamName.equals(awayTeam)){
            System.out.print("\t"+"\t"+"\t"+"\t"+awayTeam);
            System.out.println("\t"+"\t"+awayScore);
            st=1;
            }


        }
        if(st==0){
            clear();
            error="No team found!";
        }
             } catch (IOException ex) {//shows error while reading files

             }
            System.out.println(error); //printing error

    }
    static void clear(){//clear screen
        for(int i=0; i<1000;i++){
            System.out.println("\n");
        }
    }

}