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这是我的全班同学。我从文本文件中读取数据，并将它们放入一个aeeaylist。然后从该阵列列表我要显示在一个JTable，数据时的具体方法是called.But是犯规从位于另一个JFrame类一个JButton显示任何东西JTable不显示任何内容？
/*
* 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);
}
}
我请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();
}
基本上我有不同的选项的“主”的JFrame，和每个按钮，代表不同的选项，从调用公司类适当的选项的方法。
当我点击按钮“显示员工状态”。我希望它显示上面的JTable。相反，一个新的框架打开，但是空白？
编辑：如果我改变showOptionA（）静态，然后只是把它里面showEmployeesActionPerformed，（它位于类PayrollForm）
public static void showOptionA(){
Company gui =new Company();
gui.getOptionA();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setSize(600, 400);
}
我现在看到的列，但没有数据（空）
所以如果我明白我必须在公司类中创建一个setCompany方法，然后从showEmployeesActionPerformed调用该方法？ 还是相反？ 我在showEmployeesActionPerformed的方法中创建了类Company的对象，以获得对Company公司方法的访问 – George 2010-12-17 15:36:43
我也尝试过：我将public void showOptionA（）转换为public static void main（String args []），以查看它是否会只从公司类内部平稳地运行，但是只有列名出现。表格表现为空？ – George 2010-12-17 16:03:53
不，您不需要公司班级中的setCompany。相反，您需要在任何其他外部类中调用公司对象方法的setCompany类。通过这种方式，您可以确保这些其他类正在调用正确显示的公司对象上的方法。 – 2010-12-17 18:36:08