我创建了一个由各种arraylists填充的JTable。我遇到的问题是数据（所有数据）只会进入最上一行。
我应该调用某种行分隔符吗？
代码如下：
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;
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 = new JTable();
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();
}
private void table(){
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;
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");
//
// }
}
private void table(){
String[] colName = { "Course", "Examiner", "Moderator", "Semester Available ", "Associated Programs", "Associated Majors"};
DefaultTableModel model = new DefaultTableModel(colName,0);
//String[] row = new String[6];
for(Object item: nameList){
Object[] row = new Object[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);
}
}
答案 0 :(得分：3)
现在变量“i”的值总是为“0”，所以你只有一行数据。
您不能只将ArrayList添加到TableModel。您需要将ArrayList中的每个项目单独添加到TableModel。您所看到的可能是表格单元格中每个ArrayList的“toString（）”表示。
如果你想要多行，那么你需要一个循环来填充多行数据。因此，您需要循环遍历ArrayLists中的所有值，并为每个循环增加“i”变量。
另外，更好的设计是不要创建100 x 100的2Dimension数组。这只会创建不包含任何值的额外数据行。相反，您应该使用addRow(...)的{{1}}方法在表格中添加一行数据。
行不分离，它们只是创建一个非常长的行。 - Java Swing
您看到长行的原因是您将表定义为包含100行和100列，这是不合理的，因为您只有6列数据。我不知道有多少行，但这就是为什么你应该使用addRow（）方法而不是试图硬编码TableModel的大小。
代码应该是这样的：
DefaultTableModel然后你创建一个循环：
DefaultTableModel model = new DefaultTableModel(columnName, 0);