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POBeginning Java : passing to a constructor thru event listener
 

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  1. POBeginning Java : passing to a constructor thru event listener
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    <p>So, what I want to accomplish is sending the GUI Data over to the constructor to set some new instances. But I'm not really too sure on how to accomplish this. I honestly don't even know if what I'm doing is allowed or not, but man it'd be easy if it just worked this way. </p> <p>I have a GUI set up as you can see. Then when a user clicks on display, I want the program to collect the data. Then send it to the constructor.</p> <p>Now, this is a school project, so I can't really ask for a full answer (code), but hopefully someone can help me better understand what I'm doing wrong. The compiler error I get is -return type invalid- but I know that the return types match up... o-o;</p> <p>I'll provide any other info you need. If I can spruce this code up a bit to make it easier on the compiler, as if I'm doing the whole constructor thing wrong, lemme know. I'd like to have better habits while coding anyways.</p> <pre><code>import javax.swing.*; import java.awt.*; import java.awt.event.*; public class Project2 extends JFrame { //Instance Variables private String sid; private double length; private boolean widths; private String service; //Declaring GUI Components private JTextField jtfSSID; private JTextField jtfLength; private JTextArea jtaToString; private JLabel jlblTitle; private JLabel jlblSSID; private JLabel jlblLength; private JLabel jlblToString; private JButton jbtDisplay; private JButton jbtClear; private JRadioButton jrbServiceStand; private JRadioButton jrbServiceSuper; private JRadioButton jrbServiceDelux; private ButtonGroup bgService; private JCheckBox jcbWStand; private JCheckBox jcbWExtra; private JPanel tpanel; private JPanel ipanel; private JPanel wpanel; private JPanel spanel; private JPanel opanel; private final int WIDTH = 500; private final int HEIGHT = 200; //main method for inst and cust frame public static void main(String[] args){ Project2 frame = new Project2(); } //Constructors + GUI constructs public Project2(){ setTitle("Project 2 : Bahia Mar Marina"); setSize(WIDTH, HEIGHT); setLocation(300, 200); setDefaultCloseOperation(EXIT_ON_CLOSE); setLayout(new BorderLayout()); buildTitle(); buildIdentity(); buildWidth(); buildService(); buildOutput(); add( tpanel, BorderLayout.NORTH ); add( ipanel, BorderLayout.WEST); add( wpanel, BorderLayout.CENTER ); add( spanel, BorderLayout.EAST); add( opanel, BorderLayout.SOUTH ); setVisible(true); } public Project2(String newSid, double newLength, boolean newWidths, String newService){ setSid(newSid); setLength(newLength); isWidths(newWidths); setService(newService); } //-----------------------------setters public void setSid(String newSid){ sid = newSid; } public void setLength(double newLength){ if (length &lt;= 20 &amp;&amp; length &gt;= 60 || length == 0) { length = newLength; } else { JOptionPane.showMessageDialog(null, "Invalid Length! Between 20 - 60 please! Or 0 as a placeholder."); } } public void isWidths(boolean newWidths){ widths = newWidths; } public void setService(String newService){ service = newService; } //-----------------------------------getters public String getSid(){ return sid; } public double getLength(){ return length; } public boolean getWidths(){ return widths; } public String getService(){ return service; } //---------------------------------------to string public String toString( ){ String output = "Slip ID: " + sid + " length of " + length + "ft. Wide: " + widths + ".\n-----Service Type: " + service; return output; } //build top title private void buildTitle(){ tpanel = new JPanel(); jlblTitle = new JLabel("Bahia Mar Marina"); tpanel.add(jlblTitle); } //build left ID private void buildIdentity(){ ipanel = new JPanel(); ipanel.setLayout(new GridLayout (2,1)); jlblSSID = new JLabel("SSID: "); jlblLength = new JLabel("Length: "); jtfSSID = new JTextField(4); jtfLength = new JTextField(4); ipanel.setBorder(BorderFactory.createTitledBorder("Identity:")); ipanel.add(jlblSSID); ipanel.add(jtfSSID); ipanel.add(jlblLength); ipanel.add(jtfLength); } //build center width private void buildWidth(){ wpanel = new JPanel(); wpanel.setLayout(new GridLayout (1,2)); jcbWStand = new JCheckBox("Standard"); jcbWExtra = new JCheckBox("Extra-wide"); wpanel.setBorder(BorderFactory.createTitledBorder("Width:")); wpanel.add(jcbWStand); wpanel.add(jcbWExtra); } //build left service private void buildService(){ spanel = new JPanel(); spanel.setLayout(new GridLayout (3,1)); jrbServiceStand = new JRadioButton("Standard"); jrbServiceSuper = new JRadioButton("Superior"); jrbServiceDelux = new JRadioButton("Deluxe"); bgService = new ButtonGroup(); bgService.add(jrbServiceStand); bgService.add(jrbServiceSuper); bgService.add(jrbServiceDelux); spanel.setBorder(BorderFactory.createTitledBorder("Service:")); spanel.add(jrbServiceStand); spanel.add(jrbServiceSuper); spanel.add(jrbServiceDelux); } //build bottom output and buttons private void buildOutput(){ opanel = new JPanel(); opanel.setLayout(new GridLayout (2,1)); jlblToString = new JLabel("Data Output:"); jtaToString = new JTextArea(2,16); jbtDisplay = new JButton("Display!"); jbtDisplay.addActionListener(new DisplayButtonListener()); jbtClear = new JButton("-Clear-"); jbtClear.addActionListener(new ClearButtonListener()); opanel.add(jbtDisplay); opanel.add(jbtClear); opanel.add(jlblToString); opanel.add(jtaToString); } //Display Listener private class DisplayButtonListener implements ActionListener{ public void actionPerformed(ActionEvent e){ sid = jtfSSID.getText(); length = Double.parseDouble(jtfLength.getText()); //service if(jrbServiceStand.isSelected()){ service = "Standard";} else if(jrbServiceSuper.isSelected()){ service = "Superior";} else if(jrbServiceDelux.isSelected()){ service = "Deluxe";} //widths if(jcbWStand.isSelected()){ widths = false; } if(jcbWExtra.isSelected()){ widths = true; } Project2(sid, length, widths, service); } } //Clear Listener private class ClearButtonListener implements ActionListener{ public void actionPerformed(ActionEvent e){ jtfSSID.setText(" "); bgService.clearSelection(); jtfLength.setText(" "); jcbWStand.setSelected(false); jcbWExtra.setSelected(false); } }} </code></pre> <p>So, just to be specific and make sure... Here's the code with the error:</p> <pre><code>//Display Listener private class DisplayButtonListener implements ActionListener{ public void actionPerformed(ActionEvent e){ sid = jtfSSID.getText(); length = Double.parseDouble(jtfLength.getText()); //service if(jrbServiceStand.isSelected()){ service = "Standard";} else if(jrbServiceSuper.isSelected()){ service = "Superior";} else if(jrbServiceDelux.isSelected()){ service = "Deluxe";} //widths if(jcbWStand.isSelected()){ widths = false; } if(jcbWExtra.isSelected()){ widths = true; } Project2(sid, length, widths, service); //THIS LINE HAS THE ERROR } </code></pre> <p>and I want to pass it to:</p> <pre><code>public Project2(String newSid, double newLength, boolean newWidths, String newService){ setSid(newSid); setLength(newLength); isWidths(newWidths); setService(newService); } </code></pre>
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