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這是我的全班同學。我從文本文件中讀取數據，並將它們放入一個aeeaylist。然後從該陣列列表我要顯示在一個JTable，數據時的具體方法是called.But是犯規從位於另一個JFrame類一個JButton顯示任何東西JTable不顯示任何內容？
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author George
*/
import java.awt.*;
import java.util.ArrayList;
//import java.io.FileInputStream;
//import java.io.FileNotFoundException;
//import java.io.EOFException;
//import java.io.IOException;
//import java.io.ObjectInputStream;
/*import java.io.File;
import java.lang.IllegalStateException;
import java.util.NoSuchElementException;
import java.util.Scanner;
import javax.swing.JOptionPane;*/
import java.io.*;
//import java.util.Locale;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class Company extends JFrame {
private ArrayList<Employee> emp=new ArrayList<Employee>();
//Employee[] list=new Employee[7];
public void getEmployees(Employee emplo){
emp.add(emplo);
}
/*public void openTxt(){
try {
Scanner input=new Scanner(new File("Employees.txt"));
}
catch(FileNotFoundException e){
JOptionPane.showMessageDialog(null, "File Not Found.");
System.exit(1);
}
}*/
public void doRead() throws Exception{
//ArrayList<Employee> emp=new ArrayList<Employee>() ;
//Employee[] emp=new Employee[7];
//read from file
File data = new File("src/Employees.txt");
BufferedReader read = new BufferedReader(new FileReader(data));
String input;
int i = 0;
//int salesmen = 0;
while ((input = read.readLine()) != null) {
String [] lineParts = input.split(",");
/**
* the following block converts some of the strings inputted to
* the appropriate vartypes.
*/
String EmpNo=(lineParts[0]);
String type=lineParts[10];
String PostalCode = (lineParts[5]);
int phone = Integer.parseInt(lineParts[6]);
short DeptNo = (short) Integer.parseInt(lineParts[8]);
double Salary;
short card = (short) Integer.parseInt(lineParts[11]);
int dtype=0;
if(type.equals("FULL TIME")){
dtype=1;
}
else if(type.equals("SELLER")){
dtype=2;
}
else
dtype=3;
/**
* Creates employee instances depending on their type of employment
* (fulltime=1, parttime=3, salesman=2)
*/
switch (dtype) {
case 1 :
//empNo,firstname, lastname, address, city, PostalCode, phone,
//email, deptcode,Jobtype, salary, TimecardId, hoursW
Salary = Double.parseDouble(lineParts[10]);
emp.add(new FullTimeEmployee(EmpNo,lineParts[1], lineParts[2], lineParts[3],
lineParts[4], PostalCode, phone,
lineParts[7], DeptNo,type,Salary, card, 0.0));
i++;
break;
case 2 :
Salary = Double.parseDouble(lineParts[10]);
ArrayList<Orders> orders=new ArrayList<Orders>();
Salary = Double.parseDouble(lineParts[10]);
emp.add(new Salesman(EmpNo,lineParts[1], lineParts[2], lineParts[3],
lineParts[4], PostalCode, phone,
lineParts[7], DeptNo,type,Salary, card, 0.0, orders));
i++;
break;
case 3 :
Salary = Double.parseDouble(lineParts[10]);
emp.add(new PartTimeEmployee(EmpNo,lineParts[1], lineParts[2], lineParts[3],
lineParts[4], PostalCode, phone,
lineParts[7], DeptNo,type,Salary, card, 0.0));
i++;
break;
default :
break;
}
}
}
public ArrayList<Employee> getArray(){
return emp;
}
//test methodos gia tin proti epilogi-den deixnei tipota omws sto JTable ????
public /*JTable */ void getOptionA(){
ArrayList<Employee> list=getArray();
/*String[] columnNames = {"Code","First Name","Last Name","Address","Cisty","Postal Code","Phone","Email",
"Dept Code","Salary","Time Card","Hours"};*/
/* Object[][] data;
*/
JTable table = new JTable();
DefaultTableModel model = new DefaultTableModel();
table.setModel(model);
model.setColumnIdentifiers(new String[] {"Code","First Name","Last Name","Address","City","Postal Code","Phone","Email",
"Dept Code","Salary","Time Card","Hours"});
for(Employee current : list){
model.addRow(new Object[] {current.getCode(),current.getName(),current.getSurname(),
current.getAddress(),current.getCity(),current.getTK(),
current.getPhone(),current.getMail(),current.getDeptCode(),
current.getSalary(),current.getCard(),current.getHours()
});
}
/*JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true);*/
//return table;
table.setPreferredScrollableViewportSize(new Dimension(500,50));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
}
public void showOptionA(){
getOptionA();
Company gui =new Company();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(600, 400);
}
}
我請showOptionA（）。
private void showEmployeesActionPerformed(java.awt.event.ActionEvent evt) {
Results showEmp=new Results();
//showEmp.setVisible(true);
//showEmp.setOptions(1);
Company company=new Company();
/*JTable table=company.getOptionA();
JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true);
scrollPane.setViewportView(table);
table.setVisible(true);*/
company.showOptionA();
}
基本上我有不同的選項的「主」的JFrame，和每個按鈕，代表不同的選項，從調用公司類適當的選項的方法。
當我點擊按鈕「顯示員工狀態」。我希望它顯示上面的JTable。相反，一個新的框架打開，但是空白？
編輯：如果我改變showOptionA（）靜態，然後只是把它裏面showEmployeesActionPerformed，（它位於類PayrollForm）
public static void showOptionA(){
Company gui =new Company();
gui.getOptionA();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(600, 400);
}
我現在看到的列，但沒有數據（空）
所以如果我明白我必須在公司類中創建一個setCompany方法，然後從showEmployeesActionPerformed調用該方法？ 還是相反？ 我在showEmployeesActionPerformed的方法中創建了類Company的對象，以獲得對Company公司方法的訪問 – George 2010-12-17 15:36:43
我也嘗試過：我將public void showOptionA（）轉換爲public static void main（String args []），以查看它是否會只從公司類內部平穩地運行，但是隻有列名出現。表格表現爲空？ – George 2010-12-17 16:03:53
不，您不需要公司班級中的setCompany。相反，您需要在任何其他外部類中調用公司對象方法的setCompany類。通過這種方式，您可以確保這些其他類正在調用正確顯示的公司對象上的方法。 – 2010-12-17 18:36:08