Question

我会尽力解释这个问题。我正在从我的表格附加行的文件中读取分数。该线包括日期，主队，得分，客队，得分。我收集的数据是胜利，主场胜利和平局。以下代码完美无缺

JButton viewStatsButton = new JButton(new AbstractAction("VIEW STATS")
    {
        public void actionPerformed( ActionEvent e ) 
        {
            int homeScore = 0;
            int awayScore = 0;
            int homeWins = 0;
            int awayWins = 0;
            int scoreDraw = 0;
            String  line = null;
            String  output;
            String matchDay;
            @SuppressWarnings("unused")
            String  homeTeam;
            @SuppressWarnings("unused")
            String  awayTeam;
            String  file = "scores.dat";
            StringTokenizer tokenizer;

            FileReader fileReader = null;
            try 
            {
                fileReader = new FileReader (file);
            } 
            catch (FileNotFoundException e1) 
            {
                e1.printStackTrace();
            }
            BufferedReader inFile = new BufferedReader (fileReader);
            try 
            {
                line = inFile.readLine();
            } 
            catch (IOException e1) 
            {
                e1.printStackTrace();
            }
            while(line != null)
            {
                tokenizer = new StringTokenizer(line);
                matchDay = tokenizer.nextToken();
                homeTeam = tokenizer.nextToken();
                try
                {
                homeScore = Integer.parseInt(tokenizer.nextToken());
                }
                catch (NumberFormatException exception)
                {
                    System.out.println("Error in input. Line ignored:");
                    System.out.println(line);
                }
                awayTeam = tokenizer.nextToken();
                try
                {
                    awayScore = Integer.parseInt(tokenizer.nextToken());
                }
                catch (NumberFormatException exception)
                {
                    System.out.println("Error in input. Line ignored:");
                    System.out.println(line);
                }

                if(homeScore > awayScore)
                {
                    homeWins++;
                }
                else if(awayScore > homeScore)
                {
                    awayWins++;
                }
                else
                {
                    scoreDraw++;
                }

                try 
                {
                    line = inFile.readLine();
                } 
                catch (IOException e1) 
                {
                    e1.printStackTrace();
                }
            }
            try 
            {
                inFile.close();
            } 
            catch (IOException e1) 
            {
                e1.printStackTrace();
            }
            output = "Home Wins : "+homeWins+"\nAway Wins : "+awayWins+"\nDraws : "+scoreDraw;
            JTextArea textArea = new JTextArea();
            frame.getContentPane().add(textArea, BorderLayout.CENTER);
            textArea.setText(output);
        }
    });
    scorePanel.add(viewStatsButton);    
}

直到球队的名字由两个字符串组成，即纽卡斯尔联队，这个问题才会浮出水面。我要做的就是像NewcastleUnited一样将两个字符串附加在一起。我试图找出令牌的长度，如果它小于3，那么我把它解析为整数，但似乎即使下一个令牌引用在if语句中它仍然移动到令牌之后。

我将不胜感激任何帮助和指导。

Answer 1

尝试以下

在致电tokenizer.nextToken()之前，请检查tokenizer.hasMoreTokens()以确保有令牌可供阅读

if(tokenizer.hasMoreTokens())
{
    x = tokenizer.nextToken();
}

阅读团队名称（第一部分）后，检查下一部分是否为整数，将其视为分数，否则将其附加到团队名称。

homeTeam = tokenizer.nextToken();
String temp = tokenizer.nextToken();
try
{
    homeScore = Integer.parseInt(temp);
}
catch(Exception e)
{
    //Comes here if temp is not an integer, so temp is second part of name
    homeTeam = homeTeam + " "+temp; 
    homeScore = Integer.parseInt(tokenizer.nextToken());
}
//Whatever the case, if we come here, it means both hometeam and score are assigned.
...........      
...........
...........

如果您不确定是否有令牌，请不要忘记检查tokenizer.hasMoreTokens()。

操作令牌以在一行上处理可变数量的字符串

1 个答案: