Test. The data in the Java additions can display, but in buygoods. Java display is null-CodePudding

 package nobody;//test. Java 

Import the Java. The awt. Dimension; 
Import the Java. The awt. EventQueue; 
Import the Java. The awt. Event. An ActionEvent; 
Import the Java. The awt. Event. ActionListener; 

The import javax.mail. Swing. JButton; 
The import javax.mail. Swing. JFrame; 
The import javax.mail. Swing. JLabel; 
The import javax.mail. Swing. JPanel; 
The import javax.mail. Swing. The JScrollPane; 
The import javax.mail. Swing. This series; 
The import javax.mail. Swing. JTextField; 
The import javax.mail. Swing. Border. EmptyBorder; 
The import javax.mail. Swing. Table. DefaultTableModel; 

Public class Test extends JFrame {


Private JPanel contentPane. 
Private JTextField nameField; 
Private JTextField priceField; 
Private JTextField numField; 
Public data table; 
Private JButton addButton; 
Private DefaultTableModel DTM. 
Public static Test frame1=new Test (); 
Private JButton button; 
Public static int kinds=2; 
/* * 
* to Launch the application. 
*/
Public static void main (String [] args) {
EventQueue. InvokeLater (new Runnable () {
Public void the run () {
Try {

Frame1. SetVisible (true); 
} the catch (Exception e) {
e.printStackTrace(); 
} 
} 
}); 
} 

/* * 
* Create the frame. 
*/
The public Test () {
SetTitle (" stock "); 
SetTitle (" add items "); 
SetDefaultCloseOperation (JFrame. EXIT_ON_CLOSE); 
SetBounds (100, 100, 477, 367); 
ContentPane=new JPanel (); 
ContentPane. SetBorder (new EmptyBorder (5, 5, 5, 5)); 
SetContentPane (contentPane); 
ContentPane. SetLayout (null); 

//name tag 
JLabel lblNewLabel=new JLabel (" \ u540D \ u79F0 "); 
LblNewLabel. SetBounds (249, 17, 60, 15); 
ContentPane. Add (lblNewLabel); 

//price tag 
JLabel lblNewLabel_1=new JLabel (" \ u4EF7 \ u683C: "); 
LblNewLabel_1. SetBounds (249, 119, 54, 15); 
ContentPane. Add (lblNewLabel_1); 


//the number of tag 
JLabel lblNewLabel_3=new JLabel (" number "); 
LblNewLabel_3. SetBounds (249, 221, 54, 15); 
ContentPane. Add (lblNewLabel_3); 

//name text input box 
NameField=new JTextField (); 
NameField. SetBounds (309, 13, 131, 21). 
ContentPane. Add (nameField); 

NameField. SetColumns (10); 

//price text input box 
PriceField=new JTextField (); 
PriceField. SetBounds (309, 115, 131, 21). 
ContentPane. Add (priceField); 

PriceField. SetColumns (10); 

//the number of text input box 
NumField=new JTextField (); 
NumField. SetBounds (309, 217, 131, 21). 
ContentPane. Add (numField); 

NumField. SetColumns (10); 

//data add button 
AddButton=new JButton (" add "); 
AddButton. SetBounds (309, 283, 93, 23). 
ContentPane. Add (addButton); 

//rolling window panel 
The JScrollPane scrollPane=new JScrollPane (); 
ScrollPane. SetBounds (10, 10, 218, 250); 
ContentPane. Add (scrollPane); 

//the form frame used in rolling window 
Table=new series (); 
//the default Settings form model 
DTM=new DefaultTableModel (
The new Object [] [] {{\ "u519C \ u592B \ u4E0E \ u86C7 \ u77FF \ u6CC9 \ u6C34", "2", "200"}, 
{\ u5EB7 \ u5E05 \ "u5085 \ u65B9 \ u4FBF \ u9762", "5", "100"},}, 
New String [] {\ u540D \ u79F0 ""," \ u4EF7 \ u683C ", "\ u6570 \ u91CF}"); 
Table. SetModel (DTM); 

Table. The setBounds (10, 10, 200, 200); 

//set the preferred size [in addition to the form of the components will need to set the preferred size] 
ScrollPane. SetPreferredSize (new Dimension (500, 400)); 
//set automatically appear scroll bar 
ScrollPane. SetAutoscrolls (true); 
ScrollPane. SetViewportView (table); 


The button=new JButton (" \ u8FD4 \ u56DE \ u4E3B \ u9875 "); 
Button. AddActionListener (new ActionListener () {
Public void actionPerformed (an ActionEvent e) {
Start Start=new Start (); 
Start. SetVisible (true); 
dispose(); 
} 
}); 
Button. The setBounds (65, 281, 113, 27). 
ContentPane. Add (button); 

/* * 
* create button click event to add data 
*/
AddButton. AddActionListener (new ActionListener () {

@ Override 
Public void actionPerformed (an ActionEvent args0) {
Kinds++; 

String name=nameField. GetText (); 

Try {
Table. GetCellEditor (kinds, 0). StopCellEditing (); 
} the catch (Exception e) {

} 
NameField. SetText (" "); 

String price=priceField. GetText (); 
Try {
Table. GetCellEditor (kinds, 1). StopCellEditing (); 
} the catch (Exception e) {

} 
PriceField. SetText (" "); 
String num=numField. GetText (); 

Try {
Table. GetCellEditor (kinds, 2). StopCellEditing (); 
} the catch (Exception e) {

} 
NumField. SetText (" "); 


//the contents of a text box as a supplement to form 
DTM. AddRow (new String [] {name, price, num}); 
} 

}); 
} 
}

 package nobody;//buygoods. Java 

import java.awt.BorderLayout; 
Import the Java. The awt. Dimension; 
Import the Java. The awt. EventQueue; 

The import javax.mail. Swing. JButton; 
The import javax.mail. Swing. JFrame; 
The import javax.mail. Swing. JPanel; 
The import javax.mail. Swing. Border. EmptyBorder; 
The import javax.mail. Swing. JTextField; 
The import javax.mail. Swing. This series; 
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