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java - 将 6 个 ArrayList 中的数据存入单个 JTable - Java Swing

转载 作者：行者123 更新时间：2023-12-02 05:45:30 24 4
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我创建了一个 JTable，其中填充了各种数组列表，这些数组列表使用“~”进行分割从文本列表中获取数据。我遇到的问题是该表在一行上显示列表中的所有数据。例如:

Column1          Column2           Column2          Column2        Column3     Column4
1,2,3,4,5        1,2,3,4,5         1,2,3,4,5       1,2,3,4,5       1,2,3,4,5  1,2,3,4,5

When I want it to display  

Column1          Column2           Column2          Column2        Column3      Column4
1                1                    1                1              1             1 
2                2                    2                2              2             2
3                3                    3                3              3             3

你明白了。根据之前的建议，我认为问题可能是循环的，但我不确定。

任何建议都会很棒。

代码如下:

    private void table(){     

          String[] colName = { "Course", "Examiner", "Moderator", "Semester Available ", "Associated Programs", "Associated Majors"};
         DefaultTableModel model = new DefaultTableModel(colName,0);
         for(Object item : courseList){
             Object[] row = new Object[6];
       //  String[] row = new String[6];    

           row[0] = fileManage.getCourseList();
           row[1] = fileManage.getNameList();
           row[2] = fileManage.getModeratorList();
           row[3] = fileManage.getSemesterList();
           row[4] = fileManage.getProgramList();
           row[5] = fileManage.getMajorList();        
           model.addRow(row);
           textArea = new JTable(model);
}

这是具有数组列表的类:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Scanner;

public class FileIOManagement {

     private ArrayList<String> nameList = new ArrayList<String>();
     private ArrayList<String> courseList = new ArrayList<String>();
     private ArrayList<String> semesterList = new ArrayList<String>();
     private ArrayList<String> moderatorList = new ArrayList<String>();
     private ArrayList<String> programList = new ArrayList<String>();
     private ArrayList<String> majorList = new ArrayList<String>();



     public ArrayList<String> getNameList(){
         return this.nameList;
     }

     public ArrayList<String> getCourseList(){
         return this.courseList;
     }
      public ArrayList<String> getSemesterList(){
         return this.semesterList;
     }
      public ArrayList<String> getModeratorList(){
         return this.moderatorList;
     }
       public ArrayList<String> getProgramList(){
         return this.programList;
     }
        public ArrayList<String> getMajorList(){
         return this.majorList;
     }

     public void setNameList(ArrayList<String> nameList){
         this.nameList = nameList;
     }

     public void setCourseList(ArrayList<String> courseList){
         this.courseList = courseList;
     }    
      public void setSemesterList(ArrayList<String> semesterList){
         this.semesterList = semesterList;
     }    
      public void setModeratorList(ArrayList<String> moderatorList){
         this.moderatorList = moderatorList;
     }    

       public void setProgramList(ArrayList<String> programList){
         this.programList = programList;
     }    
        public void setMajorList(ArrayList<String> majorList){
         this.majorList = majorList;
     }    

     public FileIOManagement(){
         setNameList(new ArrayList<String>());
         setCourseList(new ArrayList<String>());
         setSemesterList(new ArrayList<String>());
         setModeratorList(new ArrayList<String>());
         setProgramList(new ArrayList<String>());
         setMajorList(new ArrayList<String>());
         readTextFile();
         getNameList();
         getCourseList();
     }

      private void readTextFile(){
         try{
             Scanner scan = new Scanner(new File("Course.txt"));

             while(scan.hasNextLine()){
             String line = scan.nextLine();            
             String[] tokens = line.split("~");
             String course = tokens[0].trim();
             String examiner = tokens[1].trim();
             String moderator = tokens[2].trim();
             String semester = tokens[3].trim();
             String program = tokens[4].trim();
             String major = tokens[5].trim();


             courseList.add(course);
             semesterList.add(semester);
             nameList.add(examiner);
             moderatorList.add(moderator);
             programList.add(program);
             majorList.add(major);
             HashSet hs = new HashSet();
             hs.addAll(nameList);
             nameList.clear();
             nameList.addAll(hs);
             Collections.sort(nameList);

         }
             scan.close();
         }
         catch (FileNotFoundException e){
             e.printStackTrace();
         }
     }



}

这是我需要 JTable 的类:

import java.awt.*;
import javax.swing.*;
import java.io.*;
import javax.swing.border.EmptyBorder;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.table.DefaultTableModel;

public class AllDataGUI extends JFrame{   


    private JButton saveCloseBtn = new JButton("Save Changes and Close");
    private JButton closeButton = new JButton("Exit Without Saving");
    private JFrame frame=new JFrame("Viewing All Program Details");    
    private final FileIOManagement fileManage = new FileIOManagement();    
    private ArrayList<String> nameList = new ArrayList();
    private  ArrayList<String> courseList = new ArrayList();
    private  ArrayList<String> semesterList = new ArrayList();
    private  ArrayList<String> moderatorList = new ArrayList();
    private  ArrayList<String> majorList = new ArrayList();
    private  ArrayList<String> programList = new ArrayList();    
    private JTable textArea;



     public ArrayList<String> getNameList(){
         return this.nameList;
     }

     public ArrayList<String> getCourseList(){
         return this.courseList;
     }
      public ArrayList<String> getSemesterList(){
         return this.semesterList;
     }
      public ArrayList<String> getModeratorList(){
         return this.moderatorList;
     }
       public ArrayList<String> getProgramList(){
         return this.programList;
     }
        public ArrayList<String> getMajorList(){
         return this.majorList;
     }

     public void setNameList(ArrayList<String> nameList){
         this.nameList = nameList;
     }

     public void setCourseList(ArrayList<String> courseList){
         this.courseList = courseList;
     }    
      public void setSemesterList(ArrayList<String> semesterList){
         this.semesterList = semesterList;
     }    
      public void setModeratorList(ArrayList<String> moderatorList){
         this.moderatorList = moderatorList;
     }    

       public void setProgramList(ArrayList<String> programList){
         this.programList = programList;
     }    
        public void setMajorList(ArrayList<String> majorList){
         this.majorList = majorList;
     }    



     public AllDataGUI(){
         getData();
         table();
         panels();  
            }


     public Object getValueAt(int rowIndex, int columnIndex) {
            String[] token = nameList.get(rowIndex).split(",");
            return token[columnIndex];

        }

     private void table(){


          String[] colName = { "Course", "Examiner", "Moderator", "Semester Available ", "Associated Programs", "Associated Majors"};
         DefaultTableModel model = new DefaultTableModel(colName,0);
         for(Object item : courseList){
             Object[] row = new Object[6];
       //  String[] row = new String[6];    

           row[0] = fileManage.getCourseList();
           row[1] = fileManage.getNameList();
           row[2] = fileManage.getModeratorList();
           row[3] = fileManage.getSemesterList();
           row[4] = fileManage.getProgramList();
           row[5] = fileManage.getMajorList();        
           model.addRow(row);
           textArea = new JTable(model);



//         String END_OF_LINE = ",";
//               
//         String[] colName = { "Course", "Examiner", "Moderator", "Semester Available ", "Associated Programs", "Associated Majors"};
////            textArea.getTableHeader().setBackground(Color.WHITE);
////            textArea.getTableHeader().setForeground(Color.BLUE);
//           // Font Tablefont = new Font("Details", Font.BOLD, 12);
//           // textArea.getTableHeader().setFont(Tablefont);  
//            Object[][] object = new Object[100][100];
//            int i = 0;   
//            if (fileManage.size() != 0) {
//                for (fileManage book : fileManage) {
//                    object[i][0] = fileManage.getCourseList();
//                    object[i][1] = fileManage.getNameList();
//                    object[i][2] = fileManage.getModeratorList();
//                    object[i][3] = fileManage.getSemesterList();
//                    object[i][4] = fileManage.getProgramList();
//                    object[i][5] = fileManage.getMajorList();    
//                   
//                    textArea = new JTable(object, colName);
//                }  
//            }
     }
     }



      public void getData(){      
      nameList = fileManage.getNameList();
      courseList = fileManage.getCourseList();
      semesterList = fileManage.getSemesterList();
      moderatorList = fileManage.getModeratorList();
      majorList = fileManage.getMajorList();
      programList = fileManage.getProgramList();
     // textArea.(write());
  }

    private JButton getCloseButton(){
        return closeButton;
     }     




    private void panels(){        
          JPanel panel = new JPanel(new GridLayout(1,1));
          panel.setBorder(new EmptyBorder(5, 5, 5, 5));
          JPanel rightPanel = new JPanel(new GridLayout(15,0,10,10));
          rightPanel.setBorder(new EmptyBorder(15, 5, 5, 10));
          JScrollPane scrollBarForTextArea=new JScrollPane(textArea,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
          panel.add(scrollBarForTextArea); 


          frame.add(panel);
          frame.getContentPane().add(rightPanel,BorderLayout.EAST);
          rightPanel.add(saveCloseBtn);
          rightPanel.add(closeButton);
          closeButton.addActionListener(new ActionListener() {
                  public void actionPerformed(ActionEvent e)
                    {
                        frame.dispose();

                    }
        });
          saveCloseBtn.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //saveBtn();                
                frame.dispose();

            }
        });
           frame.setSize(1000, 700);
           frame.setVisible(true);   
           frame.setLocationRelativeTo(null);

}

//    private void saveBtn(){
//        File file = null;
//        FileWriter out=null;
//        try {
//            file = new File("Course.txt");
//            out = new FileWriter(file);     
//            out.write(textArea.getText());
//            out.close();
//        } catch (FileNotFoundException e) {
//            e.printStackTrace();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
//        JOptionPane.showMessageDialog(this, "File Successfully Updated");       
//        
//  }



}

最佳答案

Table

可能有几种方法可以实现这一点，对我来说，我会从创建自己的 TableModel 开始，这将允许我控制数据添加到其中和管理的方式。

例如

public class ColumnBasedTableModel extends AbstractTableModel {

    private Map<String, List<String>> columnData;
    private List<String> columnNames;

    public ColumnBasedTableModel() {
        columnData = new HashMap<>(25);
        columnNames = new ArrayList<>(25);
    }

    public void addColumn(String name, String... data) {
        columnNames.add(name);
        List<String> colData = columnData.get(name);
        if (colData == null) {
            colData = new ArrayList<>(26);
            columnData.put(name, colData);
        }
        colData.addAll(Arrays.asList(data));
    }

    @Override
    public int getRowCount() {
        int rows = 0;
        for (List<String> data : columnData.values()) {
            rows = Math.max(data.size(), rows);
        }
        return rows;
    }

    @Override
    public int getColumnCount() {
        return columnNames.size();
    }

    @Override
    public String getColumnName(int column) {
        return columnNames.get(column);
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        Object value = null;
        String name = getColumnName(columnIndex);
        List<String> data = columnData.get(name);
        if (data != null) {

            if (rowIndex < data.size()) {
                value = data.get(rowIndex);
            }

        }
        return value;
    }

}

这个简单的模型在 Map 中维护列数据，并以列名称为键。 Map 值中的每个元素都是列中的一行...

可运行的示例...

import java.awt.EventQueue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;

public class SimpleTableExample {

    public static void main(String[] args) {
        new SimpleTableExample();
    }

    public SimpleTableExample() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                ColumnBasedTableModel model = new ColumnBasedTableModel();
                model.addColumn("Column 1", createColumn(1, 5));
                model.addColumn("Column 2", createColumn(6, 9));
                model.addColumn("Column 3", createColumn(11, 3));
                model.addColumn("Column 4", createColumn(16, 8));
                model.addColumn("Column 5", createColumn(21, 15));
                model.addColumn("Column 6", createColumn(26, 7));


                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new JScrollPane(new JTable(model)));
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }

        });
    }

    protected String[] createColumn(int startAt, int count) {

        String[] values = new String[count];
        for (int index = 0; index < count; index++) {
            values[index] = Integer.toString(startAt + index);
        }
        return values;

    }

    public class ColumnBasedTableModel extends AbstractTableModel {

        private Map<String, List<String>> columnData;
        private List<String> columnNames;

        public ColumnBasedTableModel() {
            columnData = new HashMap<>(25);
            columnNames = new ArrayList<>(25);
        }

        public void addColumn(String name, String... data) {
            columnNames.add(name);
            List<String> colData = columnData.get(name);
            if (colData == null) {
                colData = new ArrayList<>(26);
                columnData.put(name, colData);
            }
            colData.addAll(Arrays.asList(data));
        }

        @Override
        public int getRowCount() {
            int rows = 0;
            for (List<String> data : columnData.values()) {
                rows = Math.max(data.size(), rows);
            }
            return rows;
        }

        @Override
        public int getColumnCount() {
            return columnNames.size();
        }

        @Override
        public String getColumnName(int column) {
            return columnNames.get(column);
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            Object value = null;
            String name = getColumnName(columnIndex);
            List<String> data = columnData.get(name);
            if (data != null) {

                if (rowIndex < data.size()) {
                    value = data.get(rowIndex);
                }

            }
            return value;
        }

    }

}

FileIOManagement TableModel 示例

public class FileIOTableModel extends AbstractTableModel {

    public static final String[] COLUMN_NAMES = {
        "Course",
        "Name",
        "Moderator",
        "Semester",
        "Program",
        "Major",};

    private FileIOManagement manager;

    public FileIOTableModel(FileIOManagement manager) {
        this.manager = manager;
    }

    @Override
    public int getRowCount() {
        int row = manager.getCourseList().size();
        row = Math.max(row, manager.getMajorList().size());
        row = Math.max(row, manager.getModeratorList().size());
        row = Math.max(row, manager.getNameList().size());
        row = Math.max(row, manager.getProgramList().size());
        row = Math.max(row, manager.getSemesterList().size());
        return row;
    }

    @Override
    public int getColumnCount() {
        return 6;
    }

    @Override
    public String getColumnName(int column) {
        return COLUMN_NAMES[column];
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {

        List<String> data = null;
        switch (columnIndex) {
            case 0:
                data = manager.getCourseList();
                break;
            case 1:
                data = manager.getNameList();
                break;
            case 2:
                data = manager.getModeratorList();
                break;
            case 3:
                data = manager.getSemesterList();
                break;
            case 4:
                data = manager.getProgramList();
                break;
            case 5:
                data = manager.getMajorList();
                break;
        }

        Object value = null;
        if (data != null) {
            if (rowIndex < data.size()) {
                value = data.get(rowIndex);
            }
        }

        return value;

    }

}

关于java - 将 6 个 ArrayList 中的数据存入单个 JTable - Java Swing，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24103569/

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