我在我的第一个Java课程中正在进行投票程序分配。我几乎已经完成了，除了JButtons的候选人选择的奇怪问题。在第一人投票后（当窗口首次启动时），他们被禁用并且显得灰暗。然后他们应该在第二个人登录后启用。但是最新发生的是所有按钮被禁用但看似随机的按钮不会显示为灰色（即使它们确实被禁用）。有时其中一个或两个也保留其红色文本颜色（当用户点击它们以选择他们的投票选择时制定）。我在不同的区域操纵它们，我猜测这会导致我看不到的逻辑错误。
//import section
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.*;
import javax.swing.*;
public class Assig4 {
public static void main (String [] args) throws IOException
{
/* variables */
String ballotsFileName = args[0]; // gets the file name from command line
JFrame theWindow; //assign variable name for main window
ArrayList <Ballot> ballotsAr = new ArrayList<>(); //creates array for jpanel ballot objects
ArrayList <Integer> numVotes = new ArrayList<>();
int numBallots=0;
int counter = 0; //to count each file read in loop
JButton login, submitVote;
//voter variables
ArrayList <Integer> voterIdList = new ArrayList<>();
ArrayList <String> voterNames = new ArrayList<>();
ArrayList <Boolean> voterVoted = new ArrayList<>();
/*create window*/
theWindow = new JFrame ("Voting E Machine");
theWindow.setLayout(new FlowLayout());
theWindow.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
/* read in ballot info and create ballot objects*/
numBallots = readInBallotFile(ballotsFileName, numBallots, ballotsAr);
/*read in data from voter file*/
try {
// method that accesses the file
readInVoterFile(voterIdList, voterNames, voterVoted);
}
catch (Exception e)
{}
/*add local components*/
submitVote = new JButton("Submit Vote(s)");
submitVote.setEnabled(false);
login = new JButton("Login");
/*actionListener class to handle login and vote submissions*/
class MListener implements ActionListener
{
public void actionPerformed(ActionEvent ae)
{
//if submitVote button is clicked
if (ae.getSource() == submitVote)
{
//confirm submission
int selectedOption;
selectedOption = JOptionPane.showConfirmDialog(null,"Confirm vote?","Choose",JOptionPane.YES_NO_OPTION);
if (selectedOption == JOptionPane.NO_OPTION)
JOptionPane.showMessageDialog(null, "Please review selection");
else if (selectedOption == JOptionPane.YES_OPTION)
{
//thank you message
JOptionPane.showMessageDialog(null, "Thank you for your vote!");
//loop through each ballot and each candidate to update total votes
for (int bb =0; bb < ballotsAr.size(); bb++)
{
for (int s =0; s <ballotsAr.get(bb).getNumCandidates(); s++)
{
if (ballotsAr.get(bb).getVoteCount(s) >0)
ballotsAr.get(bb).addTotalNumVotes(s);
}
}
try {
// method that accesses the file
writeVoterFile(voterIdList, voterNames, voterVoted);
}
catch (Exception e)
{}
try {
// method that accesses the file
writeBallotResultsFiles(ballotsAr);
}
catch (Exception e)
{}
//reset voter machine
login.setEnabled(true);
submitVote.setEnabled(false);
for (int gg = 0; gg <ballotsAr.size(); gg++)
{
ballotsAr.get(gg).disableCandidateButtons();
}
}
} //end of if source is submit vote button
//if login button is clicked
if (ae.getSource() == login)
{
String userEntryIdString;
int userEntryId;
boolean registered=false;
do {
userEntryIdString = JOptionPane.showInputDialog(null, "Enter your voter ID number: ");
userEntryId = Integer.parseInt(userEntryIdString);
//check id number against registered citizens
for (int v =0; v < voterIdList.size(); v++)
{
if (userEntryId == voterIdList.get(v) && !voterVoted.get(v))
{
registered = true;
voterVoted.set(v,true);
login.setEnabled(false);
//print welcome message with name
JOptionPane.showMessageDialog(null, voterNames.get(v) + ", please make your choices");
}
else if (userEntryId == voterIdList.get(v) && voterVoted.get(v))
JOptionPane.showMessageDialog(null, "YOU HAVE ALREADY VOTED. If think this is an error precede.");
} // end of loop to check id against id list
if (registered)
{
//enable buttons
for (int j = 0; j<ballotsAr.size(); j++)
{
ballotsAr.get(j).enableCandidateButtons();
}
submitVote.setEnabled(true);
}
else if (!registered)
System.out.println("Please try again. ");
} while (!registered);
} //end of if login button is clicked
} //end of action performed method
}// end of actionlistener
/*create action listener object */
ActionListener listener2 = new MListener();
/*add Ballot panels*/
addPanels(theWindow, ballotsAr);
/*assign components to actionlistener*/
submitVote.addActionListener(listener2);
login.addActionListener(listener2);
/* Add local buttons to window */
theWindow.add(login);
theWindow.add(submitVote);
/*pack and set window to visible*/
theWindow.pack();
theWindow.setVisible(true);
} //end of main
public static int readInBallotFile(String ballotsFile, int numBallots, ArrayList<Ballot> ballotsAr) throws IOException
{
int counter = 0;
//objects - open and setup scanner for file
File myfile = new File (ballotsFile);
Scanner textScan = new Scanner(myfile); // reads in date from text file
numBallots = Integer.parseInt(textScan.nextLine()); //read in first line (number of ballots) and parse to int
while (textScan.hasNextLine()) //one ballot's data for each loop
{
//read in each ballot's info
//take the first line as a string
String [] tempStr = textScan.nextLine().split(":");
//parse line into proper data values
int tempId = Integer.parseInt(tempStr[0]); //take first value for id
String tempCategory = tempStr[1]; // take second value as category type
String [] tempCandidates = tempStr[2].split(","); // takes the arbitrary number of candidates and splits into separate string variables
//create ballot object
ballotsAr.add(new Ballot(tempId,tempCategory,tempCandidates, ballotsFile));
counter++; //adds counter to while loop
} // end of loop to read in ballot text file contents
textScan.close(); //closes ballots.txt file
return numBallots;
} //end of read in ballot file method
public static void addPanels(JFrame theWindow, ArrayList <Ballot> ballotsAr)
{
for (int i =0; i<ballotsAr.size();i++)
{
theWindow.add(ballotsAr.get(i));
}
}
public static void readInVoterFile(ArrayList <Integer> _voterIdList, ArrayList <String> _voterNames, ArrayList <Boolean> _voterVoted) throws IOException
{
int counter = 0;
//objects - open and setup scanner for file
File myfile = new File ("voters.txt");
Scanner textScan = new Scanner(myfile); // reads in date from text file
while (textScan.hasNextLine()) //one voter's data for each loop
{
//take the first line as a string
String [] tempStr = textScan.nextLine().split(":");
//parse line into proper data values
_voterIdList.add(Integer.parseInt(tempStr[0])); //take first value for voter id
_voterNames.add(tempStr[1]); // take second value as voter name
_voterVoted.add(Boolean.parseBoolean(tempStr[2]));
counter++; //adds counter to while loop
} // end of loop to read in voter text file contents
textScan.close(); //closes ballots.txt file
} // end of voter read in method
//update voter file local variables including false to true for voted
//write data to temp file
//delete original file
//change temp file name to previous file name
//create ballot files
//reset voterprogram
public static void writeVoterFile(ArrayList <Integer> voterIdList, ArrayList <String> voterNames, ArrayList <Boolean> voterVoted) throws IOException
{
PrintWriter outputFile = new PrintWriter("tempVotersFile.txt");
for (int q = 0; q < voterIdList.size(); q++)
{
outputFile.print(voterIdList.get(q)+":");
outputFile.print(voterNames.get(q)+":");
String tempStrboolean = String.valueOf(voterVoted.get(q));
if (q == voterIdList.size()-1) //avoid blank line at end of text file
outputFile.print(tempStrboolean);
else
outputFile.println(tempStrboolean);
}
outputFile.close();
//change temp file name to voters.txt
File tempFile = new File ("tempVotersFile.txt");
File originalFile = new File ("voters.txt");
tempFile.renameTo(originalFile);
} //end of write voter method
public static void writeBallotResultsFiles(ArrayList <Ballot> _ballotsAR) throws IOException
{
for (int h = 0; h <_ballotsAR.size(); h++)
{
String tempStr = String.valueOf(_ballotsAR.get(h).getId());
PrintWriter outputFile = new PrintWriter(tempStr);
for (int r = 0; r <_ballotsAR.get(h).getNumCandidates(); r++)
{
outputFile.print(_ballotsAR.get(h).getCandidateString(r)+":");
outputFile.println(_ballotsAR.get(h).getTotalNumVotes(r));
} //end of loop for number of candidates for each ballot
outputFile.close();
} // end of loop for each ballot
} // end of write ballot results method
} // end of class
//import section
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
public class Ballot extends JPanel {
//instance variables
private int id;
private JLabel categoryLabel;
private String categoryS, ballotsFileName;
private ArrayList <JButton> candidatesButton = new ArrayList<JButton>();
private ArrayList<String> candidatesS = new ArrayList<String>();
private int [] numVotes;
private int [] totalNumVotes; // total votes for all voters
private boolean[] clicked;
//constructor
public Ballot(int _id,String _category,String [] _candidatesS, String _ballotsFileName)
{
//set variables
id = _id;
categoryS = _category;
ballotsFileName = _ballotsFileName;
for (int t= 0; t<_candidatesS.length; t++)
{
candidatesS.add(_candidatesS[t]);
} //end of loop to copy array to arrayList
categoryLabel = new JLabel(categoryS);
numVotes = new int [candidatesS.size()];
totalNumVotes = new int [candidatesS.size()];
//align label
categoryLabel.setHorizontalAlignment(SwingConstants.CENTER);
//make bold
Font f = categoryLabel.getFont();
categoryLabel.setFont(f.deriveFont(f.getStyle() ^ Font.BOLD));
// set layout for ballot panel
setLayout(new GridLayout(candidatesS.size()+1,1));
//add the category label to the panel
add(categoryLabel);
//create action listener object
ActionListener listener = new BListener();
//loop to create arbitrary number of candidate buttons
clicked = new boolean[candidatesS.size()];
for (int i = 0; i < candidatesS.size(); i++)
{
candidatesButton.add(new JButton(candidatesS.get(i)));
clicked[i] = false;
candidatesButton.get(i).addActionListener(listener);
add(candidatesButton.get(i));
candidatesButton.get(i).setEnabled(false);
} // end of loop
} //end of ballot constructor
//method to return click status
public boolean getStatusClicked(int i)
{
return clicked[i];
}
//accessor methods
public String getCategoryS() {return categoryS;}
public String getCandidateString(int i) {return candidatesS.get(i);} //not right
public int getNumCandidates() {return candidatesButton.size();}
public int getId() {return id;}
public int getVoteCount(int i) {return numVotes[i];}
public int getTotalNumVotes (int i) {return totalNumVotes[i];}
//mutator methods
public void enableCandidateButtons()
{
for (int g = 0; g<candidatesS.size(); g++)
{
candidatesButton.get(g).setEnabled(true);
}
}
public void disableCandidateButtons() //disable and reset buttons after one person votes
{
for (int g = 0; g<candidatesS.size(); g++)
{
candidatesButton.get(g).setEnabled(false);
clicked[g] = false;
candidatesButton.get(g).setForeground(Color.BLACK);
}
}
public void addTotalNumVotes(int i) {totalNumVotes[i]++;}
//listener to toggle the status of buttons when clicked
private class BListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
int i = 0; //counter variable for arraylist calls
for (JButton b: candidatesButton) //change to REGULAR FOR LOOP??
{
if (e.getSource() == candidatesButton.get(i))
{
clicked[i] = !clicked[i];
if (clicked[i])
{
candidatesButton.get(i).setForeground(Color.RED);
numVotes[i]++;
//JOptionPane.showMessageDialog(null,numVotes[i]); debugging option to check vote count
}
else if (!clicked[i])
{
candidatesButton.get(i).setForeground(Color.BLACK);
numVotes[i]--;
}
} // end of if get source is
else
{
candidatesButton.get(i).setForeground(Color.BLACK);
clicked[i] =false;
numVotes[i] = 0;
}
i++; //increment int counter
} // end of cycle through all buttons
} // end of actionperformed
} //end of listener
} // end of ballot class