Arberden

So how do i call a method from another class without resetting its variables Solved using static to call the methods so i do not need to declare the constructor

So how should i call another class if i want to keep the variables. Sorry i'm still new to java

I think i found the error. Everytime i declare the constructor like this DataBase d=new DataBase(); The variables in database gets reset. Am i right?

OK. i am posting all the codes here Database code public class DataBase extends Pattern { //Declare Variables boolean correct = false; int adminIndexNo; String names[] = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U" }; int admNo[] = {1333961, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 }; int pattern[] = { 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357, 12357,}; int pin[] = { 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456, 123456,}; double money[]={ 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, }; //Declare Constructor so methods can be called public DataBase() { } //Method checkAdmNo checks the admno of the user and matches it to //the AdmNo in the adminIndexNo to find which row it belongs to public void checkAdmNo(int admno, int method) { for(int i = 0; i < admNo.length; i++){ if ((admNo[i] != admno)) { correct = false; } else { adminIndexNo = i; correct = true; break; } } if (correct==false) System.out.println("Incorrect AdmNo or PIN"); } //Using the row found above check the pin number of it to see if it matches public void checkPIN(int PIN) { if (correct) { if ((pin[adminIndexNo] == PIN)) { System.out.println("Welcome " + names[adminIndexNo] + " to DIT 22 Bank!\nEnter your pattern here."); super.callPattern(); correct = false; } else { System.out.println("Incorrect AdmNo or PIN"); correct = false; //reinvoke the bank screen to reenter AdmNo and PIN Bank.main(names); } } } //Using the row found above check the pattern of it to see if it matches //Currently does not work as the adminIndexNo variable is being reset public void checkPattern(int pat) { if (pattern[adminIndexNo] == pat) { System.out.println("Welcome " + names[adminIndexNo] + " to DIT 22 Bank"); Bank d = new Bank(); d.getMethod(); } else { System.out.println("Incorrect Pattern"); super.callPattern(); } }} Bank code public class Bank extends JFrame implements ActionListener{ //Declare variables private JLabel Title,ID,Purpose; private JComboBox Usage; private JTextField Text1,Displayer; private JButton SignUp,ResetPass; private JButton button[]=new JButton[12]; String DisplayerStr=""; DataBase d = new DataBase(); Ding t = new Ding(); int method; String enteredPin=""; //Constructor public Bank(){ //Create all buttons/labels/comboBox etc. setFont(new Font("TimeRoman",Font.PLAIN,24)); JPanel TopPanel = new JPanel(); TopPanel.setLayout(new FlowLayout(FlowLayout.CENTER)); Title= new JLabel("Bank"); Title.setForeground(Color.MAGENTA); Title.setFont(new Font("TimeRoman",Font.PLAIN,50)); TopPanel.add(Title); add(TopPanel,BorderLayout.NORTH); JPanel CenterPanel = new JPanel(); CenterPanel.setLayout(new BorderLayout()); add(CenterPanel,BorderLayout.CENTER); JPanel InputPanel = new JPanel(); InputPanel.setLayout(new GridLayout(3,2,0,31)); InputPanel.setBorder(BorderFactory.createTitledBorder("Credentials")); InputPanel.add(ID= new JLabel("User ID :")); InputPanel.add(Text1= new JTextField(10)); InputPanel.add(Purpose = new JLabel("Purpose :")); InputPanel.add(Usage= new JComboBox(new String[]{"Withdraw","Deposit","Transfer","Statement","Change Pin"})); InputPanel.add(SignUp= new JButton("Sign Up")); InputPanel.add(ResetPass= new JButton("Forget Password")); CenterPanel.add(InputPanel,BorderLayout.WEST); JPanel Number = new JPanel(); Number.setLayout(new BorderLayout()); JPanel PIN= new JPanel(); PIN.setLayout(new GridLayout(4,3)); PIN.setBorder(BorderFactory.createTitledBorder("PIN Number")); for (int number=1; number<=9; number++) PIN.add(button[number]=new JButton(Integer.toString(number))); PIN.add(button[10]=new JButton("Enter")); PIN.add(button[0]=new JButton("0")); PIN.add(button[11]=new JButton("Reset")); Number.add(PIN,BorderLayout.NORTH); JPanel Display = new JPanel(); Display.setLayout(new BorderLayout()); Display.setBorder(BorderFactory.createTitledBorder("Entered number :")); Display.add(Displayer= new JTextField(10)); Number.add(Display,BorderLayout.CENTER); CenterPanel.add(Number,BorderLayout.EAST); //add action listener to all button[0].addActionListener(this); button[1].addActionListener(this); button[2].addActionListener(this); button[3].addActionListener(this); button[4].addActionListener(this); button[5].addActionListener(this); button[6].addActionListener(this); button[7].addActionListener(this); button[8].addActionListener(this); button[9].addActionListener(this); button[10].addActionListener(this); button[11].addActionListener(this); SignUp.addActionListener(this); ResetPass.addActionListener(this); Usage.addActionListener(this); Text1.addActionListener(this); //make displayer uneditable Displayer.setEditable(false); }//action performed public void actionPerformed(ActionEvent e){ //display X when a number is pressed if(e.getSource()==button[0]){ enteredPin+= "0"; DisplayerStr+="X";} else if(e.getSource()==button[1]){ enteredPin+= "1"; DisplayerStr+="X";} else if(e.getSource()==button[2]){ enteredPin+= "2"; DisplayerStr+="X";} else if(e.getSource()==button[3]){ enteredPin+= "3"; DisplayerStr+="X";} else if(e.getSource()==button[4]){ enteredPin+= "4"; DisplayerStr+="X";} else if(e.getSource()==button[5]){ enteredPin+= "5"; DisplayerStr+="X";} else if(e.getSource()==button[6]){ enteredPin+= "6"; DisplayerStr+="X";} else if(e.getSource()==button[7]){ enteredPin+= "7"; DisplayerStr+="X";} else if(e.getSource()==button[8]){ enteredPin+= "8"; DisplayerStr+="X";} else if(e.getSource()==button[9]){ enteredPin+= "9"; DisplayerStr+="X";} if(e.getSource()==button[0]||e.getSource()==button[1]||e.getSource()==button[2]||e.getSource()==button[3]||e.getSource()==button[4]||e.getSource()==button[5]||e.getSource()==button[6]||e.getSource()==button[7]||e.getSource()==button[8]||e.getSource()==button[9]){ //update onto the screen Displayer.setText(DisplayerStr); //add a - after the X but is not refreshed DisplayerStr+="-";} //get the input option on ComboBox if (e.getSource()==Usage){ JComboBox Usage=(JComboBox) e.getSource(); String s =(String) Usage.getItemAt(Usage.getSelectedIndex()); if (s== "Withdraw"){ System.out.println("Withdraw"); method=1; } else if(s=="Deposit"){ System.out.println("Deposit"); method=2; } else if(s=="Transfer"){ System.out.println("Transfer"); method=3; } else if(s=="Statement"){ System.out.println("Statement"); method=4; } else if(s=="Change Pin"){ System.out.println("Change Pin"); method=5; } } //enter button if(e.getSource()==button[10]){ //call methods in database to check if admno and pin are accurate d.checkAdmNo((Integer.parseInt(Text1.getText())),method); d.checkPIN(Integer.parseInt(enteredPin)); //dispose it dispose(); } //reset button if (e.getSource()==button[11]){ enteredPin = ""; DisplayerStr = ""; Displayer.setText(DisplayerStr); Text1.setText(""); } } //get the method from JComboBox public void getMethod(){ Deposit d=new Deposit(); Withdraw w=new Withdraw(); switch(method){ case(1):w.callWithdraw(); break; case(2):d.callDeposit(); break; } } //main public static void main(String[] args) { Bank frame= new Bank(); frame.setTitle("Bank"); frame.pack(); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); frame.setResizable(false); } } Pattern code public class Pattern extends JFrame implements MouseListener { //Variable Declaration private JButton button1[] = new JButton[9]; boolean holding = false; private static boolean btn0Clicked = false, btn1Clicked = false, btn2Clicked = false, btn3Clicked = false, btn4Clicked = false, btn5Clicked = false, btn6Clicked = false, btn7Clicked = false, btn8Clicked = false; String enteredPattern = ""; //Constructor public Pattern() { JPanel b = new JPanel(); b.setLayout(new GridLayout(3, 3, 50, 30)); //Creating Buttons for (int i = 0; i < button1.length; i++) { button1[i] = new JButton(); button1[i].setText(Integer.toString(i + 1)); b.add(button1[i]); button1[i].addMouseListener(this); } add(b); } //Mouse event mouse pressed public void mousePressed(MouseEvent e) { //Set the holding down mouse is true holding = true; //Get the first button pressed for (int i = 0; i < button1.length; i++) { if (e.getSource() == button1[i]) { enteredPattern = (Integer.toString(i + 1)); } } } //Mouse event mouse entered public void mouseEntered(MouseEvent e) { //Check if mouse is held down if (holding) { for (int i = 0; i < button1.length; i++) { if ((e.getSource() == button1[i]) && button1[i].isEnabled()) { //check when mouse mouses over a button and the button is enabled //add moused over button to enteredPattern and disable it button1[i].setEnabled(false); enteredPattern += (Integer.toString(i + 1)); } } } } //Mouse event mouse released public void mouseReleased(MouseEvent e) { //Set mouse holding down to false holding = false; //Re-enable Buttons for (int i = 0; i < button1.length; i++) { button1[i].setEnabled(true); } //call method in database to checkPattern DataBase d = new DataBase(); d.checkPattern((Integer.parseInt(enteredPattern))); dispose(); } //Just here to allow program to run public void mouseClicked(MouseEvent e) { } //Just here to allow program to run public void mouseExited(MouseEvent e) { } //method call pattern public void callPattern() { Pattern frame = new Pattern(); frame.setTitle("Pattern"); frame.setSize(500, 200); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }}

Sorry about that. I just added in code tags and it is extending to the pattern class.

Hi guys, I have this java project where I am creating a bank and when i call another class, the variable in the first class resets. I don't really know why. The first screen prompt the user to enter their AdmNo and PIN which is transferred into the Database with no problems. Then, the second screen will have a prompt to enter in a pattern as a secondary password. When this happens, the variable storing the identity of the person(array) is being reset. Database is extends to the pattern. This is the class for the Database. //Method checkAdmNo checks the admno of the user and matches it to //the AdmNo in the array to find which row it belongs to public void checkAdmNo(int admno, int method) { for(int i = 0; i < admNo.length; i++){ if ((admNo[i] != admno)) { correct = false; } else { array = i; correct = true; break; } } if (correct==false) System.out.println("Incorrect AdmNo or PIN"); } //Using the row found above check the pin number of it to see if it matches public void checkPIN(int PIN) { if (correct) { if ((pin[array] == PIN)) { System.out.println("Welcome " + names[array] + " to DIT 22 Bank!\nEnter your pattern here."); super.callPattern(); correct = false; } else { System.out.println("Incorrect AdmNo or PIN"); correct = false; //reinvoke the bank screen to reenter AdmNo and PIN Bank.main(names); } } } //Using the row found above check the pattern of it to see if it matches //Currently does not work as the array variable is being reset public void checkPattern(int pat) { if (pattern[array] == pat) { System.out.println("Welcome " + names[array] + " to DIT 22 Bank"); } else { System.out.println("Incorrect Pattern"); //reinvoke the pattern screen to reenter pattern super.callPattern(); } } This is the Pattern class public void mouseReleased(MouseEvent e) { //Set mouse holding down to false holding = false; //Re-enable Buttons for (int i = 0; i < button1.length; i++) { button1[i].setEnabled(true); } //call method in database to checkPattern DataBase d = new DataBase(); d.checkPattern((Integer.parseInt(enteredPattern))); dispose(); } Sorry if its abit long so i included only the necessary parts. Thanks for help in advance.