Why isnt my if statement working

8 New Member

Hi guys im not sure what i am doinf wrong but the if statement in the action performed is not working any ideas

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import java.io.*;

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import java.text.*;
 
public class LenzHotel extends JFrame implements ActionListener

{

    DataInputStream output;

    DataInputStream input;

    //contruct components

    JTextArea roomDisplay1 = new JTextArea();

    JTextArea roomDisplay2 = new JTextArea();

    JTextArea roomDisplay3 = new JTextArea();

    JTextArea roomDisplay4 = new JTextArea();

    JTextArea roomDisplay5 = new JTextArea();

    JTextArea roomDisplay6 = new JTextArea();

    JTextArea roomDisplay7 = new JTextArea();

    JTextArea roomDisplay8 = new JTextArea();

    JTextArea roomDisplay9 = new JTextArea();

    JTextArea roomDisplay10 = new JTextArea();

    JTextArea roomDisplay11 = new JTextArea();

    JTextArea roomDisplay12 = new JTextArea();

    JTextArea roomDisplay13 = new JTextArea();

    JTextArea roomDisplay14 = new JTextArea();

    JTextArea roomDisplay15 = new JTextArea();

    JTextArea roomDisplay16 = new JTextArea();

    JTextArea roomDisplay17 = new JTextArea();

    JTextArea roomDisplay18 = new JTextArea();

    JTextArea roomDisplay19 = new JTextArea();

    JTextArea roomDisplay20 = new JTextArea();

    JComboBox choice = new JComboBox();

    JLabel name = new JLabel("Name");

    JTextField nameField = new JTextField(15);

    JLabel phone = new JLabel("Phone Number");

    JTextField phoneField = new JTextField(15);

    JLabel vehicle = new JLabel("Vehicle Registration Number");

    JTextField vehicleField = new JTextField(15);

    JLabel address = new JLabel("Customers address");

    JTextField addressField = new JTextField(15);

    JLabel checkin = new JLabel("Check in time and date");

    JTextField checkinField = new JTextField(15);

    JLabel business = new JLabel("Business or Overnight");

    JTextField businessField = new JTextField(15);

    JLabel tariff = new JLabel("Tariff");

    JTextField tariffField = new JTextField(15);

    JLabel deposit = new JLabel("Deposit");

    JTextField depositField = new JTextField(15);

    JLabel checkout = new JLabel("Check out Time and Date");

    JTextField checkoutField = new JTextField(15);

    JLabel choiceLabel = new JLabel("Clear which Field");

    JComboBox smoking = new JComboBox();

    JLabel bookLabel = new JLabel("Book which room");

    JComboBox book = new JComboBox();

    JButton bookButton = new JButton("Book room");
 
    public LenzHotel()

    {

        super("Lenasia Hotel");

    }
 
    public Container createContentPane()

    {

        JPanel bottomPanel = new JPanel();

        bottomPanel.add(bookLabel);

        bottomPanel.add(book);

                bottomPanel.add(choice);

            book.addItem("1");

            book.setActionCommand("one");

            book.addItem("2");

            book.setActionCommand("two");

            book.addActionListener(this);

            book.addItem("3");

            book.setActionCommand("three");

            book.addActionListener(this);

            book.addItem("4");

            book.setActionCommand("four");

            book.addActionListener(this);

            book.addItem("5");

            book.setActionCommand("five");

            book.addActionListener(this);

            book.addItem("6");

            book.setActionCommand("six");

            book.addActionListener(this);

            book.addItem("7");

            book.setActionCommand("seven");

            book.addActionListener(this);

            book.addItem("8");

            book.setActionCommand("eight");

            book.addActionListener(this);

            book.addItem("9");

            book.setActionCommand("nine");

            book.addActionListener(this);

            book.addItem("10");

            book.setActionCommand("ten");

            book.addActionListener(this);

            book.addItem("11");

            book.setActionCommand("eleven");

            book.addActionListener(this);

            book.addItem("12");

            book.setActionCommand("twelve");

            book.addActionListener(this);

            book.addItem("13");

            book.setActionCommand("thirteen");

            book.addActionListener(this);

            book.addItem("14");

            book.setActionCommand("fourteen");

            book.addActionListener(this);

            book.addItem("15");

            book.setActionCommand("fifteen");

            book.addActionListener(this);

            book.addItem("sixteen");

            book.setActionCommand("16");

            book.addActionListener(this);

            book.addItem("seventeen");

            book.setActionCommand("17");

            book.addActionListener(this);

            book.addItem("eighteen");

            book.setActionCommand("18");

            book.addActionListener(this);

            book.addItem("nineteen");

            book.setActionCommand("19");

            book.addActionListener(this);

            book.addItem("20");

            book.setActionCommand("twenty");

            book.addActionListener(this);
 
        bottomPanel.add(bookButton);

        bookButton.addActionListener(this);
 
        bottomPanel.add(choiceLabel);

        bottomPanel.add(choice);

            choice.addItem("1");

            choice.setActionCommand("1");

            choice.addActionListener(this);

            choice.addItem("2");

            choice.setActionCommand("2");

            choice.addActionListener(this);

            choice.addItem("3");

            choice.setActionCommand("3");

            choice.addActionListener(this);

            choice.addItem("4");

            choice.setActionCommand("4");

            choice.addActionListener(this);

            choice.addItem("5");

            choice.setActionCommand("5");

            choice.addActionListener(this);

            choice.addItem("6");

            choice.setActionCommand("6");

            choice.addActionListener(this);

            choice.addItem("7");

            choice.setActionCommand("7");

            choice.addActionListener(this);

            choice.addItem("8");

            choice.setActionCommand("8");

            choice.addActionListener(this);

            choice.addItem("9");

            choice.setActionCommand("9");

            choice.addActionListener(this);

            choice.addItem("10");

            choice.setActionCommand("10");

            choice.addActionListener(this);

            choice.addItem("11");

            choice.setActionCommand("11");

            choice.addActionListener(this);

            choice.addItem("12");

            choice.setActionCommand("12");

            choice.addActionListener(this);

            choice.addItem("13");

            choice.setActionCommand("13");

            choice.addActionListener(this);

            choice.addItem("14");

            choice.setActionCommand("14");

            choice.addActionListener(this);

            choice.addItem("15");

            choice.setActionCommand("15");

            choice.addActionListener(this);

            choice.addItem("16");

            choice.setActionCommand("16");

            choice.addActionListener(this);

            choice.addItem("17");

            choice.setActionCommand("17");

            choice.addActionListener(this);

            choice.addItem("18");

            choice.setActionCommand("18");

            choice.addActionListener(this);

            choice.addItem("19");

            choice.setActionCommand("19");

            choice.addActionListener(this);

            choice.addItem("20");

            choice.setActionCommand("20");

            choice.addActionListener(this);
 
        JPanel northPanel = new JPanel();

        northPanel.setLayout(new GridLayout(5,4,10,10));

        northPanel.add(roomDisplay1);

        roomDisplay1.setColumns(5);

        roomDisplay1.setRows(5);

        roomDisplay1.setLineWrap(true);

        roomDisplay1.setBackground(Color.green);

        roomDisplay1.setText("Room 1");

        roomDisplay1.setEditable(false);

        JScrollPane scrollPane1 = new JScrollPane(roomDisplay1);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane1);

        northPanel.add(roomDisplay2);

        roomDisplay2.setColumns(5);

        roomDisplay2.setRows(5);

        roomDisplay2.setLineWrap(true);

        roomDisplay2.setText("Room 2");

        roomDisplay2.setEditable(false);

        roomDisplay2.setBackground(Color.green);

        JScrollPane scrollPane2 = new JScrollPane(roomDisplay2);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane2);

        northPanel.add(roomDisplay3);

        roomDisplay3.setColumns(5);

        roomDisplay3.setRows(5);

        roomDisplay3.setLineWrap(true);

        roomDisplay3.setText("Room 3");

        roomDisplay3.setEditable(false);

        roomDisplay3.setBackground(Color.green);

        JScrollPane scrollPane3 = new JScrollPane(roomDisplay3);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane3);

        northPanel.add(roomDisplay4);

        roomDisplay4.setColumns(5);

        roomDisplay4.setRows(5);

        roomDisplay4.setLineWrap(true);

        roomDisplay4.setText("Room 4");

        roomDisplay4.setEditable(false);

        roomDisplay4.setBackground(Color.green);

        JScrollPane scrollPane4 = new JScrollPane(roomDisplay4);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane4);

        northPanel.add(roomDisplay5);

        roomDisplay5.setColumns(5);

        roomDisplay5.setRows(5);

        roomDisplay5.setLineWrap(true);

        roomDisplay5.setText("Room 5");

        roomDisplay5.setEditable(false);

        roomDisplay5.setBackground(Color.green);

        JScrollPane scrollPane5 = new JScrollPane(roomDisplay5);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane5);

        northPanel.add(roomDisplay6);

        roomDisplay6.setColumns(5);

        roomDisplay6.setRows(5);

        roomDisplay6.setLineWrap(true);

        roomDisplay6.setText("Room 6");

        roomDisplay6.setEditable(false);

        roomDisplay6.setBackground(Color.green);

        JScrollPane scrollPane6 = new JScrollPane(roomDisplay6);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane6);

        northPanel.add(roomDisplay7);

        roomDisplay7.setColumns(5);

        roomDisplay7.setRows(5);

        roomDisplay7.setLineWrap(true);

        roomDisplay7.setText("Room 7");

        roomDisplay7.setEditable(false);

        roomDisplay7.setBackground(Color.green);

        JScrollPane scrollPane7 = new JScrollPane(roomDisplay7);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane7);

        northPanel.add(roomDisplay8);

        roomDisplay8.setText("Room 8");

        roomDisplay8.setColumns(5);

        roomDisplay8.setRows(5);

        roomDisplay8.setLineWrap(true);

        roomDisplay8.setEditable(false);

        roomDisplay8.setBackground(Color.green);

        JScrollPane scrollPane8 = new JScrollPane(roomDisplay8);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane8);

        northPanel.add(roomDisplay9);

        roomDisplay9.setColumns(5);

        roomDisplay9.setRows(5);

        roomDisplay9.setLineWrap(true);

        roomDisplay9.setText("Room 9");

        roomDisplay9.setEditable(false);

        roomDisplay9.setBackground(Color.green);

        JScrollPane scrollPane9 = new JScrollPane(roomDisplay9);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane9);

        northPanel.add(roomDisplay10);

        roomDisplay10.setColumns(5);

        roomDisplay10.setRows(5);

        roomDisplay10.setLineWrap(true);

        roomDisplay10.setText("Room 10");

        roomDisplay10.setEditable(false);

        roomDisplay10.setBackground(Color.green);

        JScrollPane scrollPane10 = new JScrollPane(roomDisplay10);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane10);

        northPanel.add(roomDisplay11);

        roomDisplay11.setColumns(5);

        roomDisplay11.setRows(5);

        roomDisplay11.setLineWrap(true);

        roomDisplay11.setText("Room 11");

        roomDisplay11.setEditable(false);

        roomDisplay11.setBackground(Color.green);

        JScrollPane scrollPane11 = new JScrollPane(roomDisplay11);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane11);

        northPanel.add(roomDisplay12);

        roomDisplay12.setColumns(5);

        roomDisplay12.setRows(5);

        roomDisplay12.setLineWrap(true);

        roomDisplay12.setText("Room 12");

        roomDisplay12.setEditable(false);

        roomDisplay12.setBackground(Color.green);

        JScrollPane scrollPane12 = new JScrollPane(roomDisplay12);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane12);

        northPanel.add(roomDisplay13);

        roomDisplay13.setColumns(5);

        roomDisplay13.setRows(5);

        roomDisplay13.setLineWrap(true);

        roomDisplay13.setText("Room 13");

        roomDisplay13.setEditable(false);

        roomDisplay13.setBackground(Color.green);

        JScrollPane scrollPane13 = new JScrollPane(roomDisplay13);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane13);

        northPanel.add(roomDisplay14);

        roomDisplay14.setColumns(5);

        roomDisplay14.setRows(5);

        roomDisplay14.setLineWrap(true);

        roomDisplay14.setText("Room 14");

        roomDisplay14.setEditable(false);

        roomDisplay14.setBackground(Color.green);

        JScrollPane scrollPane14 = new JScrollPane(roomDisplay14);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane14);

        northPanel.add(roomDisplay15);

        roomDisplay15.setColumns(5);

        roomDisplay15.setRows(5);

        roomDisplay15.setLineWrap(true);

        roomDisplay15.setText("Room 15");

        roomDisplay15.setEditable(false);

        roomDisplay15.setBackground(Color.green);

        JScrollPane scrollPane15 = new JScrollPane(roomDisplay15);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane15);

        northPanel.add(roomDisplay16);

        roomDisplay16.setColumns(5);

        roomDisplay16.setRows(5);

        roomDisplay16.setLineWrap(true);

        roomDisplay16.setText("Room 16");

        roomDisplay16.setEditable(false);

        roomDisplay16.setBackground(Color.green);

        JScrollPane scrollPane16 = new JScrollPane(roomDisplay16);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane16);

        northPanel.add(roomDisplay17);

        roomDisplay17.setColumns(5);

        roomDisplay17.setRows(5);

        roomDisplay17.setLineWrap(true);

        roomDisplay17.setText("Room 17");

        roomDisplay17.setEditable(false);

        roomDisplay17.setBackground(Color.green);

        JScrollPane scrollPane17 = new JScrollPane(roomDisplay17);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane17);

        northPanel.add(roomDisplay18);

        roomDisplay18.setColumns(5);

        roomDisplay18.setRows(5);

        roomDisplay18.setLineWrap(true);

        roomDisplay18.setText("Room 18");

        roomDisplay18.setEditable(false);

        roomDisplay18.setBackground(Color.green);

        JScrollPane scrollPane18 = new JScrollPane(roomDisplay18);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane18);

        northPanel.add(roomDisplay19);

        roomDisplay19.setColumns(5);

        roomDisplay19.setRows(5);

        roomDisplay19.setLineWrap(true);

        roomDisplay19.setText("Room 19");

        roomDisplay19.setEditable(false);

        roomDisplay19.setBackground(Color.green);

        JScrollPane scrollPane19 = new JScrollPane(roomDisplay19);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane19);

        northPanel.add(roomDisplay20);

        roomDisplay20.setColumns(5);

        roomDisplay20.setRows(5);

        roomDisplay20.setLineWrap(true);

        roomDisplay20.setText("Room 20");

        roomDisplay20.setEditable(false);

        roomDisplay20.setBackground(Color.green);

        JScrollPane scrollPane20 = new JScrollPane(roomDisplay20);

            scrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

            scrollPane1.setPreferredSize(new Dimension(30,30));

        northPanel.add(scrollPane20);
 
                JPanel centerPanel = new JPanel();

                centerPanel.setLayout(new GridLayout(3,6,10,10));

                centerPanel.add(name);

                centerPanel.add(nameField);

                centerPanel.add(phone);

                centerPanel.add(phoneField);

                centerPanel.add(vehicle);

                centerPanel.add(vehicleField);

                centerPanel.add(address);

                centerPanel.add(addressField);

                centerPanel.add(checkin);

                centerPanel.add(checkinField);

                centerPanel.add(business);

                centerPanel.add(businessField);

                centerPanel.add(tariff);

                centerPanel.add(tariffField);

                centerPanel.add(deposit);

                centerPanel.add(depositField);

                centerPanel.add(checkout);

                centerPanel.add(checkoutField);
 
        Container c = getContentPane();

            c.setLayout(new BorderLayout(10,10));

            c.add(northPanel,BorderLayout.NORTH);

            c.add(centerPanel,BorderLayout.CENTER);

            c.add(bottomPanel,BorderLayout.SOUTH);

        return c;
 
    }//end of container pane
 
    public void actionPerformed(ActionEvent e)

    {

        String arg = e.getActionCommand();

        if(arg == "1")

        {

                    roomDisplay1.setBackground(Color.red);

                    roomDisplay1.setText("Room 1"+"\nName: "+

                                    nameField.getText()+"\nPhone number: "+

                                    phoneField.getText()+"\nVehicle registration number: "+

                                    vehicleField.getText()+"\nCustomers address: "+

                                    addressField.getText()+"\nCheck in: "+

                                    checkinField.getText()+"\nType of stay: "+

                                    businessField.getText()+"\nTariff: "+

                                    tariffField.getText()+"\nDeposit: "+

                                    depositField.getText()+"\nCheckout: "+

                                    checkoutField.getText()

                                );

        }

    }
 
    public static void main(String[] args)

    {

        JFrame.setDefaultLookAndFeelDecorated(true);

        LenzHotel f = new LenzHotel();

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.setContentPane(f.createContentPane());

        f.setSize(700,500);

        f.setVisible(true);

    }//end of main method

}//end of main costructor method

Oct 18 '08 #1

Subscribe Reply

2269

JosAH

11,448

Recognized Expert MVP

Hi guys im not sure what i am doinf wrong but the if statement in the action performed is not working any ideas

You don't compare Strings by using the == operator; you did this:

Expand|Select|Wrap|Line Numbers

if(arg == "1")

This only checks whether or not arg is identical to "1" and most likely it isn't.
It can only point to another string having the content "1" but seldom to the
literal String "1".

If you want to compare Strings for having equal content you have to do this:

Expand|Select|Wrap|Line Numbers

if (arg.equals("1"))

Also read the API documentation for the String class. Remember: only primitives
(int, long, double etc) can be compared for equality of content by using the ==
opererators; class objects have the equals() method for that.

kind regards,

Jos

Oct 18 '08 #2

Badboy112

New Member

You don't compare Strings by using the == operator; you did this:

Expand|Select|Wrap|Line Numbers

if(arg == "1")

This only checks whether or not arg is identical to "1" and most likely it isn't.
It can only point to another string having the content "1" but seldom to the
literal String "1".

If you want to compare Strings for having equal content you have to do this:

Expand|Select|Wrap|Line Numbers

if (arg.equals("1"))

Also read the API documentation for the String class. Remember: only primitives
(int, long, double etc) can be compared for equality of content by using the ==
opererators; class objects have the equals() method for that.

kind regards,

Jos

Hi jos

This is the error message im getting

G:\LenzHotel.ja va:460: cannot resolve symbol
symbol : method eqauls (java.lang.Stri ng)
location: class java.lang.Strin g
if(arg.eqauls(" one"))
^
1 error

Tool completed with exit code 1

Oct 18 '08 #3

JosAH

11,448

Recognized Expert MVP

Hi jos

This is the error message im getting

G:\LenzHotel.ja va:460: cannot resolve symbol
symbol : method eqauls (java.lang.Stri ng)
location: class java.lang.Strin g
if(arg.eqauls(" one"))
^
1 error

Tool completed with exit code 1

You can spell ;-)

kind regards,

Jos

Oct 18 '08 #4

Badboy112

New Member

You can spell ;-)

kind regards,

Jos

lol
(ARGS)

thanx man

Oct 18 '08 #5

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