Variable from one class to another
I have a Program that contains a JDesktop Pane, and when the program starts, it creates the "main" window as in JInternal Frame.
When a certain check box is checked, I call an external class that creates and returns a JInternalFrame. What I need to do is have the external class get a Vector from the main class (I pass it in when i create the object), edit the Vector, then return it to the main class. If i try to create a method in the main class like "returnVector()" or whatever to get the vector back to the main class, I get the error of "Non-static variable cannot be referenced from a non-static context". How can I get around that? The NEXT issue is this: I would like to cause the JInternalFrame that is created from the external class (on the JDesktopPane in the main class) to close itself when a button in it is clicked. I'm guess I'd need a Listener somewhere. Would that listener be in the Main class or in the external one. Does this make sense? Any help would be greatly appreciated.
Sorry, This might be a bit lengthy, but it works and illustrates my problem. I created it in NetBeans. There are the two classes I'm jusing. The issue is illustrated in the button listener on the 2nd class:
The First:
package javaapplication3;
import java.beans.PropertyVetoException;
import java.util.Vector;
import javax.swing.JInternalFrame;
public class NewJFrame extends javax.swing.JFrame {
Vector <String> TestVector = new Vector <String> (0); //Vector to move around.
public NewJFrame() {
//add some test strings to the Vector
TestVector.add("String1");
TestVector.add("String2");
TestVector.add("String3");
initComponents();
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jDesktopPane1 = new javax.swing.JDesktopPane();
jInternalFrame1 = new javax.swing.JInternalFrame();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jInternalFrame1.getContentPane().setLayout(new java.awt.FlowLayout());
jInternalFrame1.setVisible(true);
jLabel1.setText("This is a VERY simple example");
jInternalFrame1.getContentPane().add(jLabel1);
jButton1.setText("Press this");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ButtonListen(evt);
jInternalFrame1.getContentPane().add(jButton1);
jInternalFrame1.setBounds(10, 10, 350, 120);
jDesktopPane1.add(jInternalFrame1, javax.swing.JLayeredPane.DEFAULT_LAYER);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jDesktopPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jDesktopPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
pack();
}// </editor-fold>
private void ButtonListen(java.awt.event.ActionEvent evt) {
JInternalFrame newFrame;
NewJFrame2 roadframe = new NewJFrame2(TestVector);
newFrame= roadframe.getFrameBack();
newFrame.setVisible(true);
jDesktopPane1.add(newFrame);
try {
newFrame.setSelected(true);
} catch (PropertyVetoException ex) {
ex.printStackTrace();
//created this in hopes of using it to return the vector from NewJFrame2
public void returnVector(Vector<String> vectorAgain){
this.TestVector=vectorAgain;
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JDesktopPane jDesktopPane1;
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JLabel jLabel1;
// End of variables declaration
}The 2nd:
package javaapplication3;
import java.util.Vector;
import javax.swing.DefaultListModel;
import javax.swing.JInternalFrame;
public class NewJFrame2 extends javax.swing.JFrame {
Vector <String> testVector=new Vector<String>(0);
DefaultListModel model;
public NewJFrame2(Vector <String> TestVector) {
this.testVector=TestVector;
initComponents();
public JInternalFrame getFrameBack(){
return jInternalFrame1;
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jInternalFrame1 = new javax.swing.JInternalFrame();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
model=new DefaultListModel();
for (int a=0; a<testVector.size();a++){
model.addElement(testVector.get(a));
jList1 = jList1=new javax.swing.JList(model);
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jInternalFrame1.setVisible(true);
jLabel1.setText("This is the 2nd class I was referencing I passed TestVector from NewFrame. It Contains:");
jInternalFrame1.getContentPane().add(jLabel1, java.awt.BorderLayout.NORTH);
jLabel2.setText("Now I want to Edit this list here, and then send it back to NewFrame1. The button will attemp.");
jInternalFrame1.getContentPane().add(jLabel2, java.awt.BorderLayout.SOUTH);
jScrollPane1.setViewportView(jList1);
jInternalFrame1.getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
jButton1.setText("Return Vector");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ReturnVectorButtonListener(evt);
jInternalFrame1.getContentPane().add(jButton1, java.awt.BorderLayout.EAST);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jInternalFrame1)
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jInternalFrame1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
pack();
}// </editor-fold>
private void ReturnVectorButtonListener(java.awt.event.ActionEvent evt) {
NewJFrame.returnVector(testVector);
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JInternalFrame jInternalFrame1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JList jList1;
private javax.swing.JScrollPane jScrollPane1;
// End of variables declaration
}
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Looking back at your original post, I see that you wrote
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> One loads two into it. two is basically a 10 frame
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> with a variable at the beginning called "var
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David Stiller
Adobe Community Expert
Dev blog,
http://www.quip.net/blog/
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Passing a variable from one class to another
Hello:
I am new to java programming. I am developing an application in Java
At a particular JTextField call it jtf3, I am invoking Calendar application by clikcing a jbutton.
I would like to set text in jtf by obtaining the date clicked by the user. I am storing complete date string in the Calendar application during ActionPerformed event at Calendar Application level.
I do not know how to pass this string to calling frame as it does not listen to the button event happening at the Calendar Application.
Much appreciated
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The method setDate set the date obtained from calendar class during actionperformed event.
The actionperfomed event from CalendarClass is pasted below as well.
Much appreciated
import javax.swing.JFrame;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.awt.*;
public class TestDrive
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public void windowClosing(WindowEvent we) { System.exit(0); }
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JTextField djtf;
String dateInput;
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setSize(100, 800);
setLocation(300, 100);
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datePanel.add(calButton, BorderLayout.SOUTH);
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datePanel.add(djtf, BorderLayout.NORTH);
content.setLayout(new BorderLayout());
content.add(datePanel, BorderLayout.CENTER);
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fr.setLocation(600, 100);
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jbtArray.addActionListener(new ActionListener()
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Using a variable from one class in another
For learning purposes, I thought I'd have a stab at making a role-playing RPG.
The first class I made was the Player class;
public class Player
public static void main(String[] args)
// [0] being base points and [1] being skill points
int[] points = {50, 10};
// Elements in statNames are relevent to stats, so stats[0] is health, and so on
String[] statNames = {"Health", "Mana", "Attack", "Magic", "Craft"};
int[] stats = new int[5];
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Scanner input = new Scanner(System.in);
System.out.print("Character name: ");
String name = input.nextLine();
return name;
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Scanner input = new Scanner(System.in);
System.out.print("Health (" + points[0] + " base points remanining): ");
stats[0] = input.nextInt();
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Scanner input = new Scanner(System.in);
System.out.print("Mana (" + points[0] + " base points remanining): ");
stats[1] = input.nextInt();
points[0] -= stats[1];
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Scanner input = new Scanner(System.in);
System.out.print("Attack (" + points[1] + " skill points remanining): ");
stats[2] = input.nextInt();
points[1] -= stats[2];
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Scanner input = new Scanner(System.in);
System.out.print("Magic (" + points[1] + " skill points remanining): ");
stats[3] = input.nextInt();
points[1] -= stats[3];
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Scanner input = new Scanner(System.in);
System.out.print("Craft (" + points[1] + " skill points remanining): ");
stats[4] = input.nextInt();
points[1] -= stats[4];
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setHealth(points, stats);
setMana(points, stats);
setAttack(points, stats);
setMagic(points, stats);
setCraft(points, stats);
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System.out.println("\n------ " + name);
for(int index = 0; index < stats.length; index++)
System.out.println(statNames[index] + ":\t" + stats[index]);
}And that would be used in the Play class;
public class Play
public static void main(String[] args)
Player player = new Player();
String name = player.setName();
player.setStats(points, stats);
} But I'm not sure how the Play class will get the arrays from the Player class. I tried simply putting public in front of the them, for example;
public String[] statNames = {"Health", "Mana", "Attack", "Magic", "Craft"};But I get an illegal start of expression error.
I may have taken the wrong approach to this all together, I'm completely new, so feel free to suggest anything else. Sorry for any ambiguity.
Edited by: xcd on Jan 6, 2010 8:12 AM
Edited by: xcd on Jan 6, 2010 8:12 AMHI XCD ,
what about making Player class as
public class Player
// [0] being base points and [1] being skill points
int[] points = {50, 10};
// Elements in statNames are relevent to stats, so stats[0] is health, and so on
public String[] statNames = {"Health", "Mana", "Attack", "Magic", "Craft"};
int[] stats = new int[5];
public String setName()
Scanner input = new Scanner(System.in);
System.out.print("Character name: ");
String name = input.nextLine();
return name;
public void setHealth(int[] points, int[] stats)
Scanner input = new Scanner(System.in);
System.out.print("Health (" + points[0] + " base points remanining): ");
stats[0] = input.nextInt();
points[0] -= stats[0];
public void setMana(int[] points, int[] stats)
Scanner input = new Scanner(System.in);
System.out.print("Mana (" + points[0] + " base points remanining): ");
stats[1] = input.nextInt();
points[0] -= stats[1];
public void setAttack(int[] points, int[] stats)
Scanner input = new Scanner(System.in);
System.out.print("Attack (" + points[1] + " skill points remanining): ");
stats[2] = input.nextInt();
points[1] -= stats[2];
public void setMagic(int[] points, int[] stats)
Scanner input = new Scanner(System.in);
System.out.print("Magic (" + points[1] + " skill points remanining): ");
stats[3] = input.nextInt();
points[1] -= stats[3];
public void setCraft(int[] points, int[] stats)
Scanner input = new Scanner(System.in);
System.out.print("Craft (" + points[1] + " skill points remanining): ");
stats[4] = input.nextInt();
points[1] -= stats[4];
public void setStats(int[] points, int[] stats)
setHealth(points, stats);
setMana(points, stats);
setAttack(points, stats);
setMagic(points, stats);
setCraft(points, stats);
public void charSummary(String name, String[] statNames, int[] stats)
System.out.println("\n------ " + name);
for(int index = 0; index < stats.length; index++)
System.out.println(statNames[index] + ":\t" + stats[index]);
}and Play class
public class Play
public static void main(String[] args)
Player player = new Player();
String name = player.setName();
player.setStats(points, stats);
}Now you can access names , you can't assign keyword to variable into method scope , make it class variable .
Hope it help :) -
Variable from one class to another in a game
I am making a game in which a user can enter the speed of the initial velocity of a ball. My problem is that when i run the program and enter the speed of the ball in the JTextField, it doesn't actually change the speed of the ball. The ball just uses the speed that was set before the program ran
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.*;
import java.util.*;
/*Main Class*/
class Junaid_Java_ISU
public static void main(String[] args)
JFrame frame = new GameFrame();
frame.show();
/*GameFrame Class*/
class GameFrame extends JFrame implements ActionListener //got rid of BounceThreadFrame
public JTextField getHeight;
public JTextField velocityText;
private JTextField windSpeed;
private double dxUser = 5;
private int hyUser;
private JPanel canvas;
public GameFrame()
setSize(640, 480);
setTitle("Bounce");
addWindowListener(new WindowAdapter() //Need to replace this with one line
public void windowClosing(WindowEvent e)
System.exit(0);
Container contentPane = getContentPane();
canvas = new JPanel();
contentPane.add(canvas, "Center");
JPanel p = new JPanel();
getHeight = new JTextField(2);
getHeight.addActionListener(this);
velocityText = new JTextField(2);
velocityText.addActionListener(this);
windSpeed = new JTextField(2);
windSpeed.setEditable(false);
velocityText.setText("5");
/*Start Button*/
JButton start = new JButton("Start");
p.add(start);
start.addActionListener(this);
/*Close Button*/
JButton close = new JButton("Close");
p.add(close);
close.addActionListener(this);
contentPane.add(p, "South");
p.add(new JLabel ("Enter Height:"));
p.add(getHeight);
p.add(new JLabel ("Enter X Velocity:"));
p.add(velocityText);
p.add(new JLabel ("Velocity Test:")); //Change this to "Wind Speed:" after
p.add(windSpeed);
public void actionPerformed (ActionEvent e)
if (e.getActionCommand().equals("Start"))
Ball b = new Ball(canvas);
b.start();
windSpeed.setText("" + getVelocity());
else if (e.getActionCommand().equals("Close"))
canvas.setVisible(false);
System.exit(0);
public double getVelocity()
return Double.parseDouble(velocityText.getText().trim());
/*Ball Class*/
class Ball extends Thread
GameFrame vx = new GameFrame();
double getDx = vx.getVelocity();
public Ball(JPanel b)
box = b;
public void draw() //Draw ball
Graphics g = box.getGraphics();
g.fillOval(x, y, XSIZE, YSIZE);
g.dispose(); //Might not need this
/*This is how the ball will move Speed of ball*/
public void move()
if (!box.isVisible())
return;
Graphics g = box.getGraphics();
g.setXORMode(box.getBackground());
g.fillOval(x, y, XSIZE, YSIZE);
x += dx;
y += dy;
Dimension d = box.getSize();
/*Change velocity*/
dx = getDx;
if (x>= 615 || y>= 390)
dx = 0;
dy = 0;
else if(y<= 0)
dy = dy + 0.2;
else
if (x>=0)
long elapsed = System.currentTimeMillis() - start; //Current time
dx = (dx + windX + (0 * elapsed));
if (y >= 0)
long elapsed = System.currentTimeMillis() - start;
dy = ((dy + windY + (accelY * elapsed)) * 0.0005);
g.fillOval(x, y, XSIZE, YSIZE);
g.dispose(); //Possibly need to remove
public void run()
try
draw();
for (int i = 1; i <= 1000; i++) //Number of times the ball moves
move();
sleep(25); //Speed of ball
} catch (InterruptedException e)
private JPanel box;
/*Size of ball*/
private static final int XSIZE = 10;
private static final int YSIZE = 10;
/*Possition of ball*/
private int x = 0;
private int y = 300;
/*X and Y speed of ball*/
private double dx = 0; //Changed from int to double
private double dy = 0; //Vertical Distance
long start = System.currentTimeMillis(); //Computer Time
//Wind and acceleration
private static final double accelY = 9.8;
private double windX = (2 * Math.random()) + 0;
private double windY = (-7000 * Math.random()) + 0;
}Junaid wrote:
I am making a game in which a user can enter the speed of the initial velocity of a ball. My problem is that when i run the program and enter the speed of the ball in the JTextField, it doesn't actually change the speed of the ball. The ball just uses the speed that was set before the program ranFirst, from my experiences, use the JPanel's paint( Graphics ) method and the passed graphics rather than writing your own draw().
Second, and the reason your ball speed doesn't change, is that in the creation of the Ball, it makes its own GameFrame, rather than using the old one.
Change the start of Ball to:
class Ball extends Thread
GameFrame vx;
double getDx;
public Ball(JPanel b, GameFrame vx)
this.vx = vx;
getDx = vx.getVelocity()
box = b;
}and the creation of the Ball to:
public Ball makeBall() {
return new Ball( canvas, this );
public void actionPerformed (ActionEvent e)
if (e.getActionCommand().equals("Start"))
// the reason I don't say Ball( canvas, this ) here
// is that this statement is inside an ActionListener
// not a GameFrame.
// Calling a method in GameFrame will pass the right object
Ball b = makeBall();
. -
How to transter contents of itab from one class to another...
Hello experts,
I am currently having problems on how to transfer the contents of an itab or even
the value of a variable from one class to another. For example, I have 10 records
in it_spfli in class 1 and when I loop at it_spfli in the method of class 2 it has no records!
This is an example:
class lcl_one definition.
public section.
data: gt_spfli type table of spfli.
methods get_data.
endclass.
class lcl_one implementation.
method get_data.
select * from spfli
into table gt_spfli.
endmethod.
endclass.
class lcl_two definition inheriting from lcl_one.
public section.
methods loop_at_itab.
endclass.
class lcl_two implementation.
method loop_at_itab.
field-symbols: <fs_spfli> like line of gt_spfli.
loop at gt_spfli assigning <fs_spfli>.
write: / <fs_spfli>-carrid.
endloop.
endmethod.
endclass.
start-of-selection.
data: one type ref to lcl_one,
two type ref to lcl_two.
create object: one, two.
call method one->get_data.
call method two->loop_at_itab.
In the example above, the contents of gt_spfli in class lcl_two is empty
even though it has records in class lcl_one. Help would be appreciated.
Thanks a lot guys and take care!Hi Uwe,
It is still the same. Here is my code:
REPORT zfi_ors_sms
NO STANDARD PAGE HEADING
LINE-SIZE 255
LINE-COUNT 65
MESSAGE-ID zz.
Include program/s *
INCLUDE zun_standard_routine. " Standard Routines
INCLUDE zun_header. " Interface Header Record
INCLUDE zun_footer. " Interface Footer Record
INCLUDE zun_interface_control. " Interface Control
INCLUDE zun_external_routine. " External Routines
INCLUDE zun_globe_header. " Report header
INCLUDE zun_bdc_routine. " BDC Routine
Data dictionary table/s *
TABLES: bkpf,
rf05a,
sxpgcolist.
Selection screen *
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
PARAMETERS: p_file TYPE sxpgcolist-parameters.
SELECTION-SCREEN END OF BLOCK b1.
*/ CLASS DEFINITIONS
CLASS lcl_main DEFINITION
CLASS lcl_main DEFINITION ABSTRACT.
PUBLIC SECTION.
Structure/s *
TYPES: BEGIN OF t_itab,
rec_content(100) TYPE c,
END OF t_itab.
TYPES: BEGIN OF t_upfile,
record_id(2) TYPE c, " Record ID
rec_date(10) TYPE c, " Record Date MM/DD/YYYY
prod_line(10) TYPE c, " Product Line
acc_code(40) TYPE c, " Acc Code
description(50) TYPE c, " Description
hits(13) TYPE c, " Hits
amount(15) TYPE c, " Amount
END OF t_upfile.
Internal table/s *
DATA: gt_bdcdata TYPE STANDARD TABLE OF bdcdata,
gt_bdcmsgcoll TYPE STANDARD TABLE OF bdcmsgcoll,
gt_itab TYPE STANDARD TABLE OF t_itab,
gt_header LIKE TABLE OF interface_header,
gt_footer LIKE TABLE OF interface_footer,
gt_upfile TYPE STANDARD TABLE OF t_upfile.
Global variable/s *
DATA: gv_target TYPE rfcdisplay-rfchost,
gv_err_flag(1) TYPE n VALUE 0,
gv_input_dir(100) TYPE c
VALUE '/gt/interface/FI/ORS/inbound/',
gv_inputfile_dir(255) TYPE c,
gv_eof_flag TYPE c VALUE 'N',
gv_string TYPE string,
gv_delimiter TYPE x VALUE '09',
gv_input_records(3) TYPE n,
gv_input_file_ctr(6) TYPE n,
gv_proc_tot_amt(14) TYPE p DECIMALS 2,
gv_prg_message TYPE string,
gv_gjahr TYPE bkpf-gjahr,
gv_monat TYPE bsis-monat.
Work area/s *
DATA: wa_itab LIKE LINE OF gt_itab,
wa_upfile LIKE LINE OF gt_upfile,
wa_footer LIKE LINE OF gt_footer,
wa_header LIKE LINE OF gt_header.
ENDCLASS.
CLASS lcl_read_app_server_file DEFINITION
CLASS lcl_read_app_server_file DEFINITION INHERITING FROM lcl_main.
PUBLIC SECTION.
METHODS: read_app_server_file,
read_input_file,
split_header,
process_upload_file,
split_string,
conv_num CHANGING value(amount) TYPE t_upfile-amount,
split_footer,
update_batch_control,
process_data.
ENDCLASS.
CLASS lcl_process_data DEFINITION
CLASS lcl_process_data DEFINITION INHERITING FROM
lcl_read_app_server_file.
PUBLIC SECTION.
METHODS process_data REDEFINITION.
ENDCLASS.
*/ CLASS IMPLEMENTATIONS
CLASS lcl_read_app_server_file IMPLEMENTATION
CLASS lcl_read_app_server_file IMPLEMENTATION.
*/ METHOD read_app_server_file - MAIN METHOD
METHOD read_app_server_file.
gv_target = sy-host.
PERFORM file_copy USING 'ZPPDCP' p_file 'HP-UX'
gv_target CHANGING gv_err_flag.
CONCATENATE gv_input_dir p_file INTO gv_inputfile_dir.
open application server file
PERFORM open_file USING gv_inputfile_dir 'INPUT'
CHANGING gv_err_flag.
WHILE gv_eof_flag = 'N'.
READ DATASET gv_inputfile_dir INTO wa_itab.
APPEND wa_itab TO gt_itab.
IF sy-subrc <> 0.
gv_eof_flag = 'Y'.
EXIT.
ENDIF.
CALL METHOD me->read_input_file.
ENDWHILE.
close application file server
PERFORM close_file USING gv_inputfile_dir.
IF wa_footer-total_no_rec <> gv_input_file_ctr.
MOVE 'Header Control on Number of Records is Invalid' TO
gv_prg_message.
PERFORM call_ws_message USING 'E' gv_prg_message 'Error'.
gv_err_flag = 1.
ELSEIF wa_footer-total_no_rec EQ 0 AND gv_input_file_ctr EQ 0.
MOVE 'Input File is Empty. Batch Control will be Updated' TO
gv_prg_message.
PERFORM call_ws_message USING 'I' gv_prg_message 'Information'.
CALL METHOD me->update_batch_control.
gv_err_flag = 1.
ENDIF.
IF gv_err_flag <> 1.
IF wa_footer-total_amount <> gv_proc_tot_amt.
MOVE 'Header Control on Amount is Invalid' TO gv_prg_message.
PERFORM call_ws_message USING 'E' gv_prg_message 'Error'.
gv_err_flag = 1.
ENDIF.
ENDIF.
ENDMETHOD.
*/ METHOD read_input_file
METHOD read_input_file.
CASE wa_itab-rec_content+0(2).
WHEN '00'.
CALL METHOD me->split_header.
WHEN '01'.
CALL METHOD me->process_upload_file.
ADD 1 TO gv_input_file_ctr.
ADD wa_upfile-amount TO gv_proc_tot_amt.
WHEN '99'.
CALL METHOD me->split_footer.
WHEN OTHERS.
gv_err_flag = 1.
ENDCASE.
ENDMETHOD.
*/ METHOD split_header
METHOD split_header.
CLEAR: wa_header,
gv_string.
MOVE wa_itab TO gv_string.
SPLIT gv_string AT gv_delimiter INTO
wa_header-record_id
wa_header-from_system
wa_header-to_system
wa_header-event
wa_header-batch_no
wa_header-date
wa_header-time.
APPEND wa_header TO gt_header.
ENDMETHOD.
*/ METHOD process_upload_file
METHOD process_upload_file.
CLEAR gv_string.
ADD 1 TO gv_input_records.
MOVE wa_itab-rec_content TO gv_string.
CALL METHOD me->split_string.
CALL METHOD me->conv_num CHANGING amount = wa_upfile-amount.
APPEND wa_upfile TO gt_upfile.
ENDMETHOD.
*/ METHOD split_string
METHOD split_string.
CLEAR wa_upfile.
SPLIT gv_string AT gv_delimiter INTO
wa_upfile-record_id
wa_upfile-rec_date
wa_upfile-prod_line
wa_upfile-acc_code
wa_upfile-description
wa_upfile-hits
wa_upfile-amount.
ENDMETHOD.
*/ METHOD conv_num
METHOD conv_num.
DO.
REPLACE gv_delimiter WITH ' ' INTO amount.
IF sy-subrc <> 0.
EXIT.
ENDIF.
ENDDO.
ENDMETHOD.
*/ METHOD split_footer
METHOD split_footer.
CLEAR: wa_footer,
gv_string.
MOVE wa_itab TO gv_string.
SPLIT gv_string AT gv_delimiter INTO
wa_footer-record_id
wa_footer-total_no_rec
wa_footer-total_amount.
CALL METHOD me->conv_num CHANGING amount = wa_footer-total_amount.
APPEND wa_footer TO gt_footer.
ENDMETHOD.
*/ METHOD update_batch_control
METHOD update_batch_control.
DATA: lv_sys_date TYPE sy-datum,
lv_sys_time TYPE sy-uzeit,
lv_temp_date(10) TYPE c.
CONCATENATE wa_header-date4(4) wa_header-date2(2)
wa_header-date+0(2)
INTO lv_temp_date.
MOVE lv_temp_date TO wa_header-date.
APPEND wa_header-date TO gt_header.
Update ZTF0001 Table
PERFORM check_interface_header USING wa_header 'U' 'GLOB'
CHANGING gv_err_flag.
Archive files
PERFORM archive_files USING 'ZPPDARC' gv_inputfile_dir 'HP-UX'
gv_target CHANGING gv_err_flag.
ENDMETHOD.
METHOD process_data.
SORT gt_upfile ASCENDING.
CLEAR wa_upfile.
READ TABLE gt_upfile INDEX 1 INTO wa_upfile.
IF sy-subrc = 0.
MOVE: wa_upfile-rec_date+6(4) TO gv_gjahr,
wa_upfile-rec_date+0(2) TO gv_monat.
ENDIF.
ENDMETHOD.
ENDCLASS.
CLASS lcl_process_data IMPLEMENTATION
CLASS lcl_process_data IMPLEMENTATION.
METHOD process_data.
CALL METHOD super->process_data.
IF NOT gt_upfile[] IS INITIAL.
ENDIF.
ENDMETHOD.
ENDCLASS.
Start of selection *
START-OF-SELECTION.
DATA: read TYPE REF TO lcl_read_app_server_file,
process TYPE REF TO lcl_process_data.
CREATE OBJECT: read, process.
CALL METHOD read->read_app_server_file.
CALL METHOD process->process_data. -
Reading a variable from one method to another method
I am pretty new to Java and object code, so please understand if you think I should know the answer to this.
I wish to pass a variable from one method to another within one servet. I have a doPost method:
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession();
String userID = (String)session.getAttribute("userID");
String title = request.getParameter("title");
PrintWriter out = response.getWriter();
out.println("userID is ..."+userID);
} and wish to pass the variable userID to:
public static void writeToDB(String title) {
try{
String connectionURL = "jdbc:mysql://localhost/cms_college";
Connection connection=null;
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager.getConnection(connectionURL, "root", "");
Statement st = connection.createStatement();
st.executeUpdate ("INSERT INTO cmsarticles (title, userID) VALUES('"+title+"','"+userID+"')");
catch(Exception e){
System.out.println("Exception is ;"+e);
}because, at the moment the userID cannot be resolved in the writeToDB method. Thanking you in anticipation.Thanks for responding.
If I replace
public static void writeToDB(String title)with
public static void writeToDB(String title, String userID)It throws up an error in the following method
public void processFileItem(FileItem item) {
// Can access all sorts of useful info. using FileItem methods
if (item.isFormField()) {
//Map<String, String> formParameters = new LinkedHashMap<String, String>();
//String filename = item.getFieldName();
//String title = item.getString();
//System.out.println("received filename is ... " + filename );
//formParameters.put(title, filename);
} else {
// Is an uploaded file, so get name & store on local filesystem
String uploadedFileName = new File(item.getName()).getName();
File savedFile = new File("c:/uploads/"+uploadedFileName);
long sizeInBytes = item.getSize();
System.out.println("uploadedFileName is " + uploadedFileName);
String title = uploadedFileName;
System.out.println("size in bytes is " + sizeInBytes);
writeToDB(title);
try {
item.write(savedFile);// write uploaded file to local storage
} catch (Exception e) {
// Problem while writing the file to local storage
} saying there are not enough arguments in writeToDB(title);
and if I put in an extra argumenet writeToDB(title,String userID);
again it does not recognise userID -
Passing a parameter from one class to another class in the same package
Hi.
I am trying to pass a parameter from one class to another class with in a package.And i am Getting the variable as null every time.In the code there is two classes.
i. BugWatcherAction.java
ii.BugWatcherRefreshAction.Java.
We have implemented caching in the front-end level.But according to the business logic we need to clear the cache and again have to access the database after some actions are happened.There are another class file called BugwatcherPortletContent.java.
So, we are dealing with three java files.The database interaction is taken care by the portletContent.java file.Below I am giving the code for the perticular function in the bugwatcherPortletContent.java:
==============================================================
public Object loadContent() throws Exception {
Hashtable htStore = new Hashtable();
JetspeedRunData rundata = this.getInputData();
String pId = this.getPorletId();
PortalLogger.logDebug(" in the portlet content: "+pId);
pId1=pId;//done by sraha
htStore.put("PortletId", pId);
htStore.put("BW_HOME_URL",CommonUtil.getMessage("BW.Home.Url"));
htStore.put("BW_BUGVIEW_URL",CommonUtil.getMessage("BW.BugView.Url"));
HttpServletRequest request = rundata.getRequest();
PortalLogger.logDebug(
"BugWatcherPortletContent:: build normal context");
HttpSession session = null;
int bugProfileId = 0;
Hashtable bugProfiles = null;
Hashtable bugData = null;
boolean fetchProfiles = false;
try {
session = request.getSession(true);
// Attempting to get the profiles from the session.
//If the profiles are not present in the session, then they would have to be
// obtained from the database.
bugProfiles = (Hashtable) session.getAttribute("Profiles");
//Getting the selected bug profile id.
String bugProfileIdObj = request.getParameter("bugProfile" + pId);
// Getting the logged in user
String userId = request.getRemoteUser();
if (bugProfiles == null) {
fetchProfiles = true;
if (bugProfileIdObj == null) {
// setting the bugprofile id as -1 indicates "all profiles" is selected
bugProfileIdObj =(String) session.getAttribute("bugProfileId" + pId);
if (bugProfileIdObj == null) {
bugProfileId = -1;
else {
bugProfileId = Integer.parseInt(bugProfileIdObj);
else {
bugProfileId = Integer.parseInt(bugProfileIdObj);
session.setAttribute(
("bugProfileId" + pId),
Integer.toString(bugProfileId));
//fetching the bug list
bugData =BugWatcherAPI.getbugList(userId, bugProfileId, fetchProfiles);
PortalLogger.logDebug("BugWatcherPortletContent:: got bug data");
if (bugData != null) {
Hashtable htProfiles = (Hashtable) bugData.get("Profiles");
} else {
htStore.put("NoProfiles", "Y");
} catch (CodedPortalException e) {
htStore.put("Error", CommonUtil.getErrMessage(e.getMessage()));
PortalLogger.logException
("BugWatcherPortletContent:: CodedPortalException!!",e);
} catch (Exception e) {
PortalLogger.logException(
"BugWatcherPortletContent::Generic Exception!!",e);
htStore.put( "Error",CommonUtil.getErrMessage(ErrorConstantsI.GET_BUGLIST_FAILED));
if (fetchProfiles) {
bugProfiles = (Hashtable) bugData.get("Profiles");
session.setAttribute("Profiles", bugProfiles);
// putting the stuff in the context
htStore.put("Profiles", bugProfiles);
htStore.put("SelectedProfile", new Integer(bugProfileId));
htStore.put("bugs", (ArrayList) bugData.get("Bugs"));
return htStore;
=============================================================
And I am trying to call this function as it can capable of fetching the data from the database by "getbugProfiles".
In the new class bugWatcherRefreshAction.java I have coded a part of code which actually clears the caching.Below I am giving the required part of the code:
=============================================================
public void doPerform(RunData rundata, Context context,String str) throws Exception {
JetspeedRunData data = (JetspeedRunData) rundata;
HttpServletRequest request = null;
//PortletConfig pc = portlet.getPortletConfig();
//String userId = request.getRemoteUser();
/*String userId = ((JetspeedUser)rundata.getUser()).getUserName();//sraha on 1/4/05
String pId = request.getParameter("PortletId");
PortalLogger.logDebug("just after pId " +pId); */
//Calling the variable holding the value of portlet id from BugWatcherAction.java
//We are getting the portlet id here , through a variable from BugWatcherAction.java
/*BugWatcherPortletContent bgAct = new BugWatcherPortletContent();
String portletID = bgAct.pId1;
PortalLogger.logDebug("got the portlet ID in bugwatcherRefreshAction:---sraha"+portletID);*/
// updating the bug groups
Hashtable result = new Hashtable();
try {
request = data.getRequest();
String userId = ((JetspeedUser)data.getUser()).getUserName();//sraha on 1/4/05
//String pId = (String)request.getParameter("portletId");
//String pId = pc.getPorletId();
PortalLogger.logDebug("just after pId " +pId);
PortalLogger.logDebug("after getting the pId-----sraha");
result =BugWatcherAPI.getbugList(profileId, userId);
PortalLogger.logDebug("select the new bug groups:: select is done ");
context.put("SelectedbugGroups", profileId);
//start clearing the cache
ContentCacheContext cacheContext = getCacheContext(rundata);
PortalLogger.logDebug("listBugWatcher Caching - removing markup content - before removecontent");
// remove the markup content from cache.
PortletContentCache.removeContent(cacheContext);
PortalLogger.logDebug("listBugWatcher Caching-removing markup content - after removecontent");
//remove the backend content from cache
CacheablePortletData pdata =(CacheablePortletData) PortletCache.getCacheable(PortletCacheHelper.getUserHandle(((JetspeedUser)data.getUser()).getUserName()));
PortalLogger.logDebug("listBugWatcher Caching User: " +((JetspeedUser)data.getUser()).getUserName());
PortalLogger.logDebug("listBugWatcher Caching pId: " +pId);
if (pdata != null)
// User's data found in cache!
PortalLogger.logDebug("listBugWatcher Caching -inside pdata!=null");
pdata.removeObject(PortletCacheHelper.getUserPortletHandle(((JetspeedUser)data.getUser()).getUserName(),pId));
PortalLogger.logDebug("listBugWatcher Caching -inside pdata!=null- after removeObject");
PortalLogger.logDebug("listBugWatcher Caching -finish calling the remove content code");
//end clearing the cache
// after clearing the caching calling the data from the database taking a fn from the portletContent.java
PortalLogger.logDebug("after clearing cache---sraha");
BugWatcherPortletContent bugwatchportcont = new BugWatcherPortletContent();
Hashtable httable= new Hashtable();
httable=(Hashtable)bugwatchportcont.loadContent();
PortalLogger.logDebug("after making the type casting-----sraha");
Set storeKeySet = httable.keySet();
Iterator itr = storeKeySet.iterator();
while (itr.hasNext()) {
String paramName = (String) itr.next();
context.put(paramName, httable.get(paramName));
PortalLogger.logDebug("after calling the databs data from hashtable---sraha");
} catch (CodedPortalException e) {
PortalLogger.logException("bugwatcherRefreshAction:: Exception- ",e);
context.put("Error", CommonUtil.getErrMessage(e.getMessage()));
catch (Exception e) {
PortalLogger.logException("bugwatcherRefreshAction:: Exception- ",e);
context.put( "Error",CommonUtil.getErrMessage(ErrorConstantsI.EXCEPTION_CODE));
try {
((JetspeedRunData) data).setCustomized(null);
if (((JetspeedRunData) data).getCustomized() == null)
ActionLoader.getInstance().exec(data,"controls.EndCustomize");
catch (Exception e)
PortalLogger.logException("bugwatcherRefreshAction", e);
===============================================================
In the bugwatcher Action there is another function called PostLoadContent.java
here though i have found the portlet Id but unable to fetch that in the bugWatcherRefreshAction.java . I am also giving the code of that function under the bugWatcherAction.Java
================================================
// Get the PortletData object from intermediate store.
CacheablePortletData pdata =(CacheablePortletData) PortletCache.getCacheable(PortletCacheHelper.getUserHandle(
//rundata.getRequest().getRemoteUser()));
((JetspeedUser)rundata.getUser()).getUserName()));
pId1 = (String)portlet.getID();
PortalLogger.logDebug("in the bugwatcher action:"+pId1);
try {
Hashtable htStore = null;
// if PortletData is available in store, get current portlet's data from it.
if (pdata != null) {
htStore =(Hashtable) pdata.getObject( PortletCacheHelper.getUserPortletHandle(
((JetspeedUser)rundata.getUser()).getUserName(),portlet.getID()));
//Loop through the hashtable and put its elements in context
Set storeKeySet = htStore.keySet();
Iterator itr = storeKeySet.iterator();
while (itr.hasNext()) {
String paramName = (String) itr.next();
context.put(paramName, htStore.get(paramName));
bugwatcherRefreshAction bRefAc = new bugwatcherRefreshAction();
bRefAc.doPerform(pdata,context,pId1);
=============================================================
So this is the total scenario for the fetching the data , after clearing the cache and display that in the portal.I am unable to do that.Presently it is still fetching the data from the cache and it is not going to the database.Even the portlet Id is returning as null.
I am unable to implement that thing.
If you have any insight about this thing, that would be great .As it is very urgent a promt response will highly appreciated.Please send me any pointers or any issues for this I am unable to do that.
Please let me know as early as possible.
Thanks and regards,
Santanu Raha.Have you run it in a debugger? That will show you exactly what is happening and why.
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