对于我的程序，我们要做的主要事情之一是将.csv文件的内容打印到GUI。我已经找到了GUI和排序方法，但是我们无法弄清楚如何将文件实际打印到GUI。关于如何做到这一点的任何想法？以下是GUI的代码：
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.*;
public class FirstGUI2 {
private static JTextArea textAreaMon;
private static JTextArea textAreaTue;
private static JTextArea textAreaWed;
private static JTextArea textAreaThu;
private static JTextArea textAreaFri;
private static JTextArea description;
private static String gE1 = "Group Exam 1";
private static String gE2 = "Group Exam 2";
private static String gE3 = "Group Exam 3";
private static String gE4 = "Group Exam 4";
private static String gE5 = "Group Exam 5";
private static String gE6 = "Group Exam 6";
private static String gE7 = "Group Exam 7";
private static String gE8 = "Group Exam 8";
private static String gE9 = "Group Exam 9";
private Container pane;
final static boolean fill = true;
final static boolean weightX = true;
final static boolean RIGHT_TO_LEFT = false;
public static String mon = "";
public static String tues = "";
public static String wed = "";
public static String thu = "";
public static String fri = "";
public static void addComponents(Container pane) {
if (RIGHT_TO_LEFT)
pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
JButton button;
pane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.fill = GridBagConstraints.HORIZONTAL;
button = new JButton("Open File");
c.gridx = 1;
c.gridy = 1;
c.insets = new Insets(5, 5, 5, 5);
pane.add(button, c);
textAreaMon = new JTextArea(mon);
//textAreaMon.append(mon.substring(0));
textAreaMon.setLineWrap(true);
textAreaMon.setEditable(false);
c.gridx = 1;
c.gridy = 2;
pane.add(textAreaMon, c);
textAreaTue = new JTextArea(tues);
textAreaTue.setLineWrap(true);
textAreaTue.setEditable(false);
c.gridx = 1;
c.gridy = 3;
pane.add(textAreaTue, c);
textAreaWed = new JTextArea(wed);
textAreaWed.setLineWrap(true);
textAreaWed.setEditable(false);
c.gridx = 1;
c.gridy = 4;
pane.add(textAreaWed, c);
textAreaThu = new JTextArea(thu);
textAreaThu.setLineWrap(true);
textAreaThu.setEditable(false);
c.gridx = 1;
c.gridy = 5;
pane.add(textAreaThu, c);
textAreaFri = new JTextArea(fri);
textAreaFri.setLineWrap(true);
textAreaFri.setEditable(false);
c.gridx = 1;
c.gridy = 6;
pane.add(textAreaFri, c);
description = new JTextArea(
"Click the open button in order to select and import your .csv file. Your scehdule and times will be displayed in the schedule below.");
description.setEditable(false);
c.gridx = 1;
c.gridy = 0;
pane.add(description, c);
// attaching the file opener to the open file button
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
new InterfacePanel();
}
});
}
//creates the frame and showing the GUI to the user
public static void makeGUI(){
JFrame frame = new JFrame("Final Exam Scheduler");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
addComponents(frame.getContentPane());
frame.pack();
frame.setVisible(true);
}
public static void printToGUI(){
//JText Fields
//textAreaMon
mon= "Monday: \n \n 8:00 - 10:00:\t Group Exam 1 \n 10:15-12:15:\t Group Exam 2 \n 12:45 - 2:45:\t";
while(!ArrayListsForClasses.time1.isEmpty()){
for(int i = 0; i < ArrayListsForClasses.time1.size(); i++){
mon += ArrayListsForClasses.time1.get(i);
mon += ", ";
}
}
mon += "\n 3:00 - 5:00:\t";
while(!ArrayListsForClasses.time2.isEmpty()){
for(int i = 0; i < ArrayListsForClasses.time2.size(); i++){
mon += ArrayListsForClasses.time2.get(i);
mon += ", ";
}
}
mon += "\n 5:30 - 7:30:\t Group Exam 3 \n \n 7:45 - 9:45:\t";
while(!ArrayListsForClasses.time3.isEmpty()){
for(int i = 0; i < ArrayListsForClasses.time3.size(); i++){
mon += ArrayListsForClasses.time3.get(i);
mon += ", ";
}
}
mon+= "\n \n";
// textAreaTues
tues = "Tuesday: \n \n 8:00 - 10:00: \t";
while (!ArrayListsForClasses.time4.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time4.size(); i++) {
tues += ArrayListsForClasses.time4.get(i);
tues += ", ";
}
}
tues += "\n 10:15 - 12:15:\t Group Exam 4 \n \n 12:45 - 2:45:\t ";
while (!ArrayListsForClasses.time5.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time5.size(); i++) {
tues += ArrayListsForClasses.time5.get(i);
tues += ", ";
}
}
tues += "\n 3:00 - 5:00:\t ";
while (!ArrayListsForClasses.time6.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time6.size(); i++) {
tues += ArrayListsForClasses.time6.get(i);
tues += ", ";
}
}
tues += "\n 5:30 - 7:30:\t ";
while (!ArrayListsForClasses.time7.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time7.size(); i++) {
tues += ArrayListsForClasses.time7.get(i);
tues += ", ";
}
}
tues += "\n 7:45 - 9:45:\t ";
while (!ArrayListsForClasses.time8.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time8.size(); i++) {
tues += ArrayListsForClasses.time8.get(i);
tues += ", ";
}
}
//TextAreaWed
wed = "Wednesday \n \n 8:00 - 10:00:\t";
while(!ArrayListsForClasses.time9.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time9.size(); i++) {
wed += ArrayListsForClasses.time9.get(i);
wed += ", ";
}
}
wed += "\n 10:15-12:15:\t";
while(!ArrayListsForClasses.time10.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time10.size(); i++) {
wed += ArrayListsForClasses.time10.get(i);
wed += ", ";
}
}
wed += "\n 12:45 - 2:45 :\t Group Exam 5 \n 3:00 - 5:00:\t";
while(!ArrayListsForClasses.time11.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time11.size(); i++) {
wed += ArrayListsForClasses.time11.get(i);
wed += ", ";
}
}
wed += "\n 5:30 - 7:30:\t";
while(!ArrayListsForClasses.time12.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time12.size(); i++) {
wed += ArrayListsForClasses.time12.get(i);
wed += ", ";
}
}
wed += "\n 7:45 - 9:45:\t";
while(!ArrayListsForClasses.time13.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time13.size(); i++) {
wed += ArrayListsForClasses.time13.get(i);
wed += ", ";
}
}
//TextAreaThurs
thu = "Thursday \n \n 8:00 - 10:00:\t";
while(!ArrayListsForClasses.time14.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time14.size(); i++) {
thu += ArrayListsForClasses.time14.get(i);
thu += ", ";
}
}
thu += "\n 10:15-12:15 :\t Group Exam 6 \n 12:45 - 2:45:\t";
while(!ArrayListsForClasses.time15.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time15.size(); i++) {
thu += ArrayListsForClasses.time15.get(i);
thu += ", ";
}
}
thu += "\n 3:00 - 5:00:\t";
while(!ArrayListsForClasses.time16.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time16.size(); i++) {
thu += ArrayListsForClasses.time16.get(i);
thu += ", ";
}
}
thu += "\n 5:30 - 7:30:\t Group Exam 7 \n 7:45 - 9:45:\t";
while(!ArrayListsForClasses.time17.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time17.size(); i++) {
thu += ArrayListsForClasses.time17.get(i);
thu += ", ";
}
}
//TextAreaFri
fri = "Friday \n \n 8:00 - 10:00:\t Group Exam 8 \n 10:15-12:15:\t";
while(!ArrayListsForClasses.time18.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time18.size(); i++) {
fri += ArrayListsForClasses.time18.get(i);
fri += ", ";
}
}
fri += "\n 12:45 - 2:45:\t Group Exam 9";
}
public static void main(String[] args){
javax.swing.SwingUtilities.invokeLater(new Runnable(){
public void run(){
makeGUI();
}
});
}
}
答案 0 :(得分：1)
我已经找到了GUI
实际上，你的代码设计都是错误的。您不应该使用静态变量和静态方法。通常，唯一的静态方法应该是创建GUI的方法。所有其他应用程序代码都应该在类中定义，因此任何方法都可以访问类的变量。
我们要做的是将.csv文件的内容打印到GUI
对我来说，＆＃34; print＆＃34;意味着使用打印机将东西打印到一张纸上。我猜你真的想在GUI中显示文件的内容。
下面是一个简单的例子，展示了如何读写文件。文件的内容将显示在文本区域中。请注意，在读取文件之前，您需要先写入文件。
我建议你从这个基本代码开始并重写你的类，这样你就可以摆脱所有的静态变量和方法：
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.text.*;
class TextAreaLoad extends JPanel
{
private JTextArea edit;
public TextAreaLoad()
{
setLayout( new BorderLayout() );
edit = new JTextArea(30, 60);
add(new JScrollPane(edit), BorderLayout.NORTH);
JButton read = new JButton("Read TextAreaLoad.txt");
read.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
FileReader reader = new FileReader( "TextAreaLoad.txt" );
BufferedReader br = new BufferedReader(reader);
edit.read( br, null );
br.close();
edit.requestFocus();
}
catch(Exception e2) { System.out.println(e2); }
}
});
add(read, BorderLayout.LINE_START);
JButton write = new JButton("Write TextAreaLoad.txt");
write.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
FileWriter writer = new FileWriter( "TextAreaLoad.txt" );
BufferedWriter bw = new BufferedWriter( writer );
edit.write( bw );
bw.close();
edit.setText("");
edit.requestFocus();
}
catch(Exception e2) { System.out.println(e2); }
}
});
add(write, BorderLayout.LINE_END);
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("TextArea Load");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TextAreaLoad());
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
答案 1 :(得分：0)
您尚未使用导入的数据将String值设置为TextAreas。你做了什么，给JTextAreas一个等于mon字符串的初始值的值，如下所示：
textAreaMon = new JTextArea(mon);
但是，这并不意味着如果mon更新，textAreaMon将会更新;它在视图初始化时非常重要。
向文件导入按钮侦听器添加方法调用，其中包含执行类似此操作的方法
textAreaMon.setText(mon);
每次导入文件时都应该正确更新GUI。
答案 2 :(得分：0)
我可能错了，但在actionPerformed()方法中，您应该编写以下代码
String myCsvFile = "mySCVFile.csv"; //you can modify this based on where the file is located
BufferedReader br = null;
String line = "";
try {
br = new BufferedReader(new FileReader(myCsvFile));
while ((line = br.readLine()) != null) {
String[] columns = line.split(","); //you may do extra tweeks in here based on how you want to display the data
for(int x=0; x <columns.length(); x++){
description.append(columns[x]); //I guess this is the textarea you want to display the content of the CSV file
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}