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Thread: SpinnerListModel setList(List<?> list)

  1. #1
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    Default SpinnerListModel setList(List<?> list)

    I'm being challenged by SpinnerListModel's setList(List<?> list) method.

    Currently I have defined a SpinnerListModel:

    private static Vector Hours12Strings = new Vector();
    static{
    Hours12Strings.add("1");
    ......... etc..........
    }

    Later on in "createGUI"


    SpinnerListModel hoursModel = new SpinnerListModel(Hours12Strings);
    This works fine.

    I have also created a static Vector named Hours24Strings and I would like to switch between 12 and 24 hour modes so I do:

    if(checkBox1224.isSelected()){
    hoursModel.setList((java.util.List)Hours24Strings) ;
    }else{
    hoursModel.setList((java.util.List)Hours12Strings) ;
    }
    And the compiler gives me the following error:

    java:150: cannot find symbol
    [javac] symbol : method setList(java.util.Vector)
    [javac] location: interface javax.swing.SpinnerModel
    [javac] hoursModel.setList(Hours24Strings);
    [javac] ^
    I'm being "dense" / what am I missing?

    Thanks in advance.
    roy


  2. #2
    Administrator copeg's Avatar
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    Default Re: SpinnerListModel setList(List<?> list)

    Vector implements List, so there shouldn't be a need to perform the class cast, and a setList method that accepts a List should work for a Vector. Can you provide a short compilable example the demo's the problem?

  3. #3
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    Default Re: SpinnerListModel setList(List<?> list)

    here's the compilable version:
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;        
    import javax.swing.event.*;        
    import java.util.*;
    import java.io.PrintWriter;
    import java.io.ByteArrayOutputStream;
     
    public class DigitalTimePanel 
    extends JPanel
    implements ActionListener
    {	
    	public DigitalTimePanel()
    	{
    		super();
    		initialize();
    	}
     
    	private static Vector Hours24Strings = null;
    	private static Vector Hours12Strings = null;
     
    	static 
    	{
    		Hours24Strings = new Vector();
    		for(int n = 0; n < 24; n++){ Hours24Strings.add( Formatter(n)); }
     
    		Hours12Strings = new Vector();
    		for(int n = 0; n <13; n++){ Hours12Strings.add( (n == 0 ? "12" : Formatter(n))); }
    	}
     
       	private static String Formatter(int value)
       	{
       		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
       		PrintWriter pw = new PrintWriter(byteArrayOutputStream);
       		pw.format("%1$02d",value);
       		pw.flush();
       		return byteArrayOutputStream. toString();
       	}
     
    	private void initialize()
    	{
     
    		setLayout(new FlowLayout(FlowLayout.CENTER,2,1));
    		JPanel p = new JPanel(new GridLayout(2,1));
    		add(p);
     
    		JPanel sp = new JPanel(new FlowLayout(FlowLayout.LEFT, 2,1));
    		p.add(sp);
    			hoursModel = new SpinnerListModel(Hours12Strings);
    			hoursSpinner =  new JSpinner(hoursModel);
    			sp.add(hoursSpinner);
     
    		sp = new JPanel(new FlowLayout(FlowLayout.CENTER, 2,1));
    		p.add(sp);
    			checkBox1224 = new JCheckBox("24 hour");
    			checkBox1224.setSelected(is24Hours);
    			checkBox1224.addActionListener(this);
    			sp.add(checkBox1224);
       	}	
     
     
        	public JFormattedTextField getTextField(JSpinner spinner) 
        	{
    		JComponent editor = spinner.getEditor();
    		if (editor instanceof JSpinner.DefaultEditor) {
    			return ((JSpinner.DefaultEditor)editor).getTextField();
    		} else {
    			System.err.println("Unexpected editor type: " + spinner.getEditor().getClass() + " isn't a descendant of DefaultEditor");
    			return null;
    		}
    	}
     
          	private JSpinner hoursSpinner =  null;	
    	private SpinnerModel hoursModel = null;
     
    	private JCheckBox checkBox1224 = null;
      	private boolean is24Hours = false;
     
    	public void actionPerformed(ActionEvent e)
    	{
    		Object source = e.getSource();
    		if(source == checkBox1224){
    			if(checkBox1224.isSelected()){
    				hoursModel.setList(Hours24Strings);
    			}else{
    				hoursModel.setList(Hours12Strings);
    			}
    		}
    	}
     
    	public void set24Hours(boolean is24Hours)
    	{
    		this.is24Hours = is24Hours; 
    		checkBox1224.setSelected(is24Hours);
    	}
     
    }

    Which gives javac DigitalTimePanel.java yields:

    DigitalTimePanel.java:26: warning: [unchecked] unchecked call to add(E) as a member of the raw type java.util.Vector
    		for(int n = 0; n < 24; n++){ Hours24Strings.add( Formatter(n)); }
    		                                               ^
    DigitalTimePanel.java:29: warning: [unchecked] unchecked call to add(E) as a member of the raw type java.util.Vector
    		for(int n = 0; n <13; n++){ Hours12Strings.add( (n == 0 ? "12" : Formatter(n))); }
    		                                              ^
    DigitalTimePanel.java:85: cannot find symbol
    symbol  : method setList(java.util.Vector)
    location: interface javax.swing.SpinnerModel
    				hoursModel.setList(Hours24Strings);
    				          ^
    DigitalTimePanel.java:87: cannot find symbol
    symbol  : method setList(java.util.Vector)
    location: interface javax.swing.SpinnerModel
    				hoursModel.setList(Hours12Strings);
    				          ^
    2 errors
    2 warnings

  4. #4
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    Default Re: SpinnerListModel setList(List<?> list)

    The function setList is not defined for the interface SpinnerModel - the code abstracts the SpinnerListModel to SpinnerModel, eg:
    SpinnerModel hoursModel = new SpinnerListModel();
    Define it as a SpinnerListModel which defines this method and it should compile.

  5. The Following User Says Thank You to copeg For This Useful Post:

    roy epperson (November 29th, 2010)

  6. #5
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    Default Re: SpinnerListModel setList(List<?> list)

    Quote Originally Posted by copeg View Post
    The function setList is not defined for the interface SpinnerModel - the code abstracts the SpinnerListModel to SpinnerModel, eg:
    SpinnerModel hoursModel = new SpinnerListModel();
    Define it as a SpinnerListModel which defines this method and it should compile.

    Good spot!! That's what I get from working on too many things yesterday

    Thanks for the help!

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