Problem in comparing Two String

Hi friends
I have a strange Problem, i am able to find out the Reason for this problem.
In my Program i use a JTextField with implements the FocusListener. i just get the Text of this JTextField and retrive a record from DataBase which is Equal to the JTextField's Text. yes it retrives the same record. Now i want to compare these two Text. I mean the JTextFied text and the text which i retrived from the Database.
My code is this
public void focusLost (FocusEvent fe) {
 Object obj = fe.getSource ();
 if (obj == txtMemberId)
 memberId = txtMemberId.getText().toString();
 int memberDays,memberBooks,memberCat,heldBooks;
 String mname,memberNo; //Use for Comparing the Member's Id.
 boolean find = false; //To Confirm the Member's Id Existance.
 try
 //SELECT Query to Retrieved the Record.
 String q = "SELECT * FROM Members WHERE RollNumber= '"+memberId+"'";
 ResultSet rs = st.executeQuery (q); //Executing the Query.
 rs.next (); //Moving towards the Record.
 memberNo = rs.getString ("RollNumber");
 //Storing the Record.
 boolean ans=memberNo.equals(memberId);
 System.out.println("STAUS OF THE COMPARISION:"+ans);
 if (ans)
 { //If Record Found then Display Records.
 System.out.println("RECORD FOUND DON'T WORRY");
 find = true;
 memberCat=rs.getInt("MCat");
 heldBooks=rs.getInt("Bcnt");
 System.out.println("HELD BOOK COUNT IS::"+heldBooks);
 mname=rs.getString ("FirstName");
 txtMemberName.setText (""+mname);
 gblname=mname;
 rs.close();
 ResultSet rs1= st.executeQuery("Select * from Mecat where MCat = " + memberCat + "" );
 rs1.next();
 memberBooks=rs1.getInt("Blmt");
 System.out.println("BOOK LIMITED TO::"+memberBooks);
 memberDays=rs1.getInt("Dlmt");
 if(heldBooks==memberBooks)
 txtClear();
 JOptionPane.showMessageDialog (this, "Book Limit Reached");
 dispose();
 GregorianCalendar gcal=new GregorianCalendar();
 id1= gcal.get(Calendar.DATE);
 im=(int)gcal.get(Calendar.MONTH)+1;
 iy=gcal.get(Calendar.YEAR);
 vd=id1+memberDays;
 vm=im;
 vy=iy;
 String xx,yy,zz;
 if(id1<10) {
 xx="0"+id1;
 } else {
 xx = ""+id1;
 if(im<10) {
 yy="0"+im;
 } else {
 yy = ""+im;
 idate=xx+"/"+yy+"/"+iy;
 // String vdate=vd+"/"+vm+"/"+vy;
 //******************** to calcutlate return date
 //System.out.println("came here1!!!");
 while(vd>31) {
 if(im==1||im==3||im==5||im==7||im==8||im==10||im==12){
 if(vd>31){
 im=im+1;
 vd=vd-31;
 if(im>12){
 im=im-12;
 iy=iy+1;
 if(im==4||im==6||im==9||im==11){
 if(vd>30){
 im=im+1;
 vd=vd-30;
 if(im>12){
 im=im-12;
 iy=iy+1;}
 if(im==2){
 if(vd>28){
 im=im+1;
 vd=vd-28;
 if(im>12){
 im=im-12;
 iy=iy+1;
 vdate = vd+"/"+im+"/"+iy;
 //System.out.println("came here3!!!");
 // txtMemberId.setText ("" + memberId);
 txtDate1.setText(idate);
 txtDate2.setText(vdate);
 else {
 find = false;
 if (find == false) {
 JOptionPane.showMessageDialog (this, "Really Record not Found.");
 System.out.println("DON'T WORRY FIND A WAY");
 catch (SQLException sqlex) {
 if (find == false) {
 //txtClear (); //Clearing the TextFields.
 JOptionPane.showMessageDialog (this, "Really Record not Found.");
 txtDate1.setText("");
 txtDate2.setText("");
 txtMemberId.setText("");
 txtMemberId.requestFocus ();
 catch(Exception e)
 e.printStackTrace();
when i compare those two Text By using this Line
boolean ans=memberNo.equals(memberId);[b]It retruns False
please tell me what would be the Problem here
Thank you for your service
Cheers
Jofin

Hi
Thank you very much, it is working for me. i am very greatful to you .
Thank you for your service
jofin

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Why i can't compare two string

* @(#)Assignment.java 1.0 03/12/12
* You can modify the template of this file in the
* directory ..\JCreator\Templates\Template_1\Project_Name.java
* You can also create your own project template by making a new
* folder in the directory ..\JCreator\Template\. Use the other
* templates as examples.
//package myprojects.assignment;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.text.*;
* MainForm.java
* Created on 12 December 2003, 16:27
* @author Akasha
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private String utxtname,ptxtpass;
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initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {
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jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
getContentPane().setLayout(null);
          getContentPane().setBounds(800,800,800,800);
addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
formMouseClicked(evt);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
jButton1.setBackground(new java.awt.Color(0, 0, 255));
jButton1.setForeground(new java.awt.Color(204, 255, 255));
jButton1.setText("Login");
jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton1MouseClicked(evt);
getContentPane().add(jButton1);
jButton1.setBounds(110, 160, 70, 30);
getContentPane().add(jTextField1);
jTextField1.setBounds(220, 70, 150, 20);
getContentPane().add(jTextField2);
jTextField2.setBounds(220, 100, 150, 20);
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jLabel1.setText("User Name");
getContentPane().add(jLabel1);
jLabel1.setBounds(60, 70, 150, 16);
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getContentPane().add(jLabel2);
jLabel2.setBounds(60, 100, 160, 16);
pack();
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private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
* @param args the command line arguments
public static void main(String args[]) {
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assign.show();
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
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Basic java. I think that you need to read the tutorial... ;-) http://java.sun.com/docs/books/tutorial/
BAD (yours): you are comparing objects (ref to objects -> always differents even if there contains the same thing)
==========
if (myname == utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else if (myname != utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);
GOOD (mine):
===========
if (myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else {
//if (!myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);

Why i can compare two string

* @(#)Assignment.java 1.0 03/12/12
* You can modify the template of this file in the
* directory ..\JCreator\Templates\Template_1\Project_Name.java
* You can also create your own project template by making a new
* folder in the directory ..\JCreator\Template\. Use the other
* templates as examples.
//package myprojects.assignment;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.text.*;
* MainForm.java
* Created on 12 December 2003, 16:27
* @author Akasha
public class Assignment extends javax.swing.JFrame {
     private String myname;
private String utxtname,ptxtpass;
/** Creates new form MainForm */
public Assignment() {
initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {
     //     JText = new JFormattedTextField();
     jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
getContentPane().setLayout(null);
          getContentPane().setBounds(800,800,800,800);
addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
formMouseClicked(evt);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
jButton1.setBackground(new java.awt.Color(0, 0, 255));
jButton1.setForeground(new java.awt.Color(204, 255, 255));
jButton1.setText("Login");
jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton1MouseClicked(evt);
getContentPane().add(jButton1);
jButton1.setBounds(110, 160, 70, 30);
getContentPane().add(jTextField1);
jTextField1.setBounds(220, 70, 150, 20);
getContentPane().add(jTextField2);
jTextField2.setBounds(220, 100, 150, 20);
     //     getContentPane().add(JFormattedTextField1);
          //JFormattedTextField.
jLabel1.setText("User Name");
getContentPane().add(jLabel1);
jLabel1.setBounds(60, 70, 150, 16);
jLabel2.setText("Password");
getContentPane().add(jLabel2);
jLabel2.setBounds(60, 100, 160, 16);
pack();
private void formMouseClicked(java.awt.event.MouseEvent evt) {
// Add your handling code here:
private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {
     myname="mazhar";
     utxtname = jTextField1.getText();
     if (myname == utxtname)
               JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
          else if (myname != utxtname)
               JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);
// Add your handling code here
/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
* @param args the command line arguments
public static void main(String args[]) {
     Assignment assign =new Assignment();
     //width and hight
     assign.setSize(400, 175);
assign.show();
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration

Basic java. I think that you need to read the tutorial... ;-) http://java.sun.com/docs/books/tutorial/
BAD (yours): you are comparing objects (ref to objects -> always differents even if there contains the same thing)
==========
if (myname == utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else if (myname != utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);
GOOD (mine):
===========
if (myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else {
//if (!myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);

Problem while comparing two internal tables

I have to modify work start date which are initial in the data base table for the records in the flat file.
my code is:
REPORT ZAUFK_WORKSTARTDATE_UPDATE .
Tables Declaration
TABLES: AUFK.
Type pools Declaration
TYPE-POOLS : SLIS.
Internal Table Declaration
DATA: I_AUFK LIKE AUFK OCCURS 0 WITH HEADER LINE,
 IT_AUFK LIKE AUFK OCCURS 0 WITH HEADER LINE,
 ITAB1 LIKE ALSMEX_TABLINE OCCURS 0 WITH HEADER LINE.
DATA: BEGIN OF I_AUFK1 OCCURS 0,
 AUFNR(12),
 AUART(4),
 END OF I_AUFK1.
Data Declaration
DATA I_FIELDCAT TYPE SLIS_FIELDCAT_ALV OCCURS 0.
DATA WA_FCAT LIKE LINE OF I_FIELDCAT.
DATA: B1 TYPE I VALUE 1,
 C1 TYPE I VALUE 1,
 B2 TYPE I VALUE 256,
 C2 TYPE I VALUE 65536.
Selection Screen Declaration
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
PARAMETERS: P_FILE LIKE RLGRAP-FILENAME.
SELECT-OPTIONS: S_AUFNR FOR AUFK-AUFNR,
 S_AUART FOR AUFK-AUART.
PARAMETERS: P_USER7 LIKE AUFK-USER7 DEFAULT '20070101' OBLIGATORY.
SELECTION-SCREEN END OF BLOCK B1.
SELECTION-SCREEN BEGIN OF BLOCK B2 WITH FRAME TITLE TEXT-002.
PARAMETERS: R1 RADIOBUTTON GROUP G1 DEFAULT 'X' USER-COMMAND UCOMM1, " Upload using File Path
 R2 RADIOBUTTON GROUP G1. " Uplaod using particular IO's
SELECTION-SCREEN END OF BLOCK B2.
To get F4 Help for File path on selection screen.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR P_FILE.
CALL FUNCTION 'F4_FILENAME'
 EXPORTING
 PROGRAM_NAME = SYST-CPROG
 DYNPRO_NUMBER = SYST-DYNNR
 IMPORTING
 FILE_NAME = P_FILE.
To disbale the filepath when r2 radiobutton is selected
AT SELECTION-SCREEN OUTPUT.
LOOP AT SCREEN.
Check if R1 is checked
IF R1 = 'X'.
 IF SCREEN-NAME = 'S_AUFNR-LOW' OR
 SCREEN-NAME = 'S_AUFNR-HIGH' OR
 SCREEN-NAME = 'S_AUART-LOW' OR
 SCREEN-NAME = 'S_AUART-HIGH'.
Make the Internal order number and order type field disable from the selection screen
 SCREEN-INPUT = '0'.
 MODIFY SCREEN.
 ENDIF.
ELSEIF R2 = 'X' AND SCREEN-NAME = 'P_FILE'.
Make the file path field disappear from the selection screen
 SCREEN-INPUT = 0.
 MODIFY SCREEN.
 ENDIF.
ENDLOOP.
Start of executable code
START-OF-SELECTION.
To get the relavent IO data from the order master data table
SELECT *
 FROM AUFK
 INTO TABLE I_AUFK
 WHERE AUFNR IN S_AUFNR
 AND AUART IN S_AUART
 AND ( AUART = '5200' OR AUART = '5500'
 OR AUART = '5700' OR AUART = '8500'
 OR AUART = '8700' ).
Table must be updated using flat file
IF R1 = 'X'.
To Upload Excel sheet data into an internal table
 CALL FUNCTION 'ALSM_EXCEL_TO_INTERNAL_TABLE'
 EXPORTING
 FILENAME = P_FILE
 I_BEGIN_COL = B1
 I_BEGIN_ROW = C1
 I_END_COL = B2
 I_END_ROW = C2
 TABLES
 INTERN = ITAB1
 EXCEPTIONS
 INCONSISTENT_PARAMETERS = 1
 UPLOAD_OLE = 2
 OTHERS = 3.
 IF SY-SUBRC <> 0.
 MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
 ENDIF.
To organize the data in the internal table(excel data) as per our requirement
 PERFORM ORGANIZE_UPLOADED_DATA.
 LOOP AT I_AUFK1.
Comparing the excel data and the database table data
 READ TABLE I_AUFK WITH KEY AUFNR = I_AUFK1-AUFNR.
 IF SY-SUBRC EQ 0.
Check if the the work start date is initial(blank)
 IF I_AUFK-USER7 IS INITIAL.
If work start is initial move the value in p_user7 to the work start date field in i_aufk
 MOVE P_USER7 TO I_AUFK-USER7.
 MODIFY I_AUFK.
Moving the data which is changed into it_aufk internal table(this table is for displaying the updated records)
 MOVE-CORRESPONDING I_AUFK TO IT_AUFK.
 APPEND IT_AUFK.
 ENDIF.
 ENDIF.
 ENDLOOP.
endif.
WA_FCAT-FIELDNAME = 'AUFNR'.
WA_FCAT-TABNAME = 'I_AUFK'.
WA_FCAT-SELTEXT_M = 'Internal Order Number'.
WA_FCAT-OUTPUTLEN = 12.
APPEND WA_FCAT TO i_fieldcat.
WA_FCAT-FIELDNAME = 'AUART'.
WA_FCAT-TABNAME = 'I_AUFK'.
WA_FCAT-SELTEXT_M = 'Order Type'.
WA_FCAT-OUTPUTLEN = 4.
APPEND WA_FCAT TO I_FIELDCAT.
WA_FCAT-FIELDNAME = 'KTEXT'.
WA_FCAT-TABNAME = 'I_AUFK'.
WA_FCAT-SELTEXT_M = 'Description'.
WA_FCAT-OUTPUTLEN = 40.
APPEND WA_FCAT TO I_FIELDCAT.
WA_FCAT-FIELDNAME = 'USER7'.
WA_FCAT-TABNAME = 'I_AUFK'.
WA_FCAT-SELTEXT_M = 'Work Start Date'.
WA_FCAT-OUTPUTLEN = 10.
APPEND WA_FCAT TO I_FIELDCAT.
Updating the AUFK(Internal Order Data Table) using i_aufk
*MODIFY AUFK FROM TABLE I_AUFK.
Check if the database table is modified
*IF SY-SUBRC = 0.
Display the modified data
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
 I_CALLBACK_PROGRAM = SY-REPID
 I_GRID_TITLE = 'List of updated Records'
 IT_FIELDCAT = I_FIELDCAT[]
TABLES
 T_OUTTAB = IT_AUFK[]
EXCEPTIONS
 PROGRAM_ERROR = 1
 OTHERS = 2
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
*ENDIF.
ENDIF.
*& Form ORGANIZE_UPLOADED_DATA
 text
FORM ORGANIZE_UPLOADED_DATA .
SORT ITAB1 BY ROW COL.
LOOP AT ITAB1.
 CASE ITAB1-COL.
 WHEN 1.
 I_AUFK1-AUFNR = ITAB1-VALUE.
 WHEN 2.
 I_AUFK1-AUART = ITAB1-VALUE.
 ENDCASE.
 AT END OF ROW.
 APPEND I_AUFK1.
 ENDAT.
ENDLOOP.
LOOP AT I_AUFK1.
CONCATENATE '000000' I_AUFK1-AUFNR INTO I_AUFK1-AUFNR.
MODIFY I_AUFK1.
ENDLOOP.
ENDFORM. " ORGANIZE_UPLOADED_DATA
The bold are is were i'm facing problem. Please help me .its urgent.

Hi try using the below code...
LOOP AT I_AUFK1.
Comparing the excel data and the database table data
READ TABLE I_AUFK WITH KEY AUFNR = I_AUFK1-AUFNR.
IF SY-SUBRC EQ 0.
Check if the the work start date is initial(blank)
IF I_AUFK-USER7 IS INITIAL.
If work start is initial move the value in p_user7 to the work start date field in i_aufk
MOVE P_USER7 TO I_AUFK-USER7.
[b]MODIFY I_AUFK from i_aufk transporting user7.
Moving the data which is changed into it_aufk internal table(this table is for displaying the updated records)
MOVE-CORRESPONDING I_AUFK TO IT_AUFK.
APPEND IT_AUFK.
ENDIF.
ENDIF.
ENDLOOP.
endif.
if you can't still solve some more questions
what is teh sy-subrc of teh read ..
what does the header line contain after teh read
and what happens after modify.. does the contents change?

Compare two strings...

Hi,
I have something like this, where book.cost( ) is a string that already existes an pages is another string with the number the user inserts. And no, unfortunatly I cannot do it with integers... How can I copare the value of both? thanks
if (book.cost( ) > pages){
book.print();
}else{
System.out.println("Any book with more than "+pages+" was found");
}

Looks like you're doing the same coursework as me Kikens! I agree that they should both definately be int's, but apparently he wants us to use strings instead. No idea why though. The parseint method works fine for it, as long as you've entered a number that can be turned into a integer earlier - I've used a try-catch loop to return an error if it's not an integer.

Problem in comparing Two String

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