我创建了一个 actionListener 类。在 actionPerformed 方法中,我想运行一个代码。此代码涉及从多个文本文件导入数据,并将它们存储在二维数组中。然后它将打印出框架中的报价列表。然后它会打印出 5 个分析并让用户选择哪一个。但是,我目前被 IOException 困住了。此外,某些代码状态会给出错误“无法访问的代码”。那是什么意思?下面是我的 actionListener 类的代码
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class CrucibleButtonListener implements ActionListener
{
private Swing g;
public CrucibleButtonListener (Swing g)
{
this.g = g;
}
public void actionPerformed(ActionEvent e)
{
this.g.updateTextField(getQuotes());
}
private String getQuotes() throws IOException
{
BufferedReader inputQuote;
BufferedReader inputTheme;
BufferedReader inputCharacterAnalysis;
BufferedReader inputSignificance;
BufferedReader inputPlotEnhancement;
BufferedReader inputSpeaker;
Scanner in = new Scanner (System.in);
int howMany=0;
int quoteSelection;
int analysisSelection;
// Count how many lines in the text file
FileReader fr = new FileReader ("CrucibleQuotations.txt");
LineNumberReader ln = new LineNumberReader (fr);
while (ln.readLine() != null)
{
howMany++;
}
//import information from the text file
inputQuote = new BufferedReader (new FileReader ("CrucibleQuotations.txt"));
inputTheme = new BufferedReader (new FileReader("CrucibleTheme.txt"));
inputCharacterAnalysis = new BufferedReader (new FileReader("CrucibleCharacterAnalysis.txt"));
inputSignificance = new BufferedReader (new FileReader("CrucibleSignificance.txt"));
inputPlotEnhancement = new BufferedReader (new FileReader("CruciblePlotEnhancement.txt"));
inputSpeaker = new BufferedReader (new FileReader("CrucibleSpeaker.txt"));
//Create array based on how many quotes available in the text file
String [][] quotes = new String [howMany][6];
//Store quote information in the array and display the list of quotations
for (int i=0; i<howMany; i++)
{
quotes [i][0] = inputQuote.readLine();
return (i+1 + ") " + quotes [i][0]);
quotes [i][1] = inputTheme.readLine();
quotes [i][2] = inputCharacterAnalysis.readLine();
quotes [i][3] = inputSignificance.readLine();
quotes [i][4] = inputPlotEnhancement.readLine();
quotes [i][5] = inputSpeaker.readLine();
}
//Ask user to choose the quote they want to analyze
return ("Choose a quotation by inputting the number: ");
quoteSelection = in.nextInt ();
if (quoteSelection!=0)
{
//Show user selections to analyze
return ("1. Theme");
return ("2. Character Analysis");
return ("3. Significance");
return ("4. Plot Enhancement");
return ("5. Speaker");
analysisSelection = in.nextInt ();
//Display the analysis
if (analysisSelection <= 5 || analysisSelection > 0)
{
return (quotes [quoteSelection-1][analysisSelection]);
}
}
}
}
这里是摇摆课。它只包含一个按钮,我似乎无法让它工作。
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.util.*;
public class Swing
{
private JLabel label;
public Swing()
{
JFrame frame = new JFrame ("FRAME SAMPLE");
frame.setSize(500, 500);
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
JButton cButton = new JButton("The Crucible");//The JButton name.
frame.add(cButton);//Add the button to the JFrame.
cButton.addActionListener(new CrucibleButtonListener(this));
}
}
主类:
public class Main
{
public static void main (String [] args)
{
new Swing();
}
}