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Aug 9th, 2008
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i need urgent help. this error cmoing. i dont know what to do

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java Syntax (Toggle Plain Text)
  1. import java.awt.*;
  2. import java.applet.*;
  3. import java.awt.event.*;
  4.  
  5. public class hashedited extends Applet implements ItemListener
  6. {
  7.     CheckboxGroup cbg;
  8.     //CheckboxGroup type1,type2;
  9.     //CheckboxGroup cbg1;
  10.     //CheckboxGroup size1, size2;
  11.  
  12.     private TextField amtpaid;
  13.     private Button cancel;
  14.     private Label cost;
  15.     private Choice flavour;
  16.     private Label flavours;
  17.     private Label name;
  18.     private Button ok;
  19.     private Label paid;
  20.     private Panel panel1;
  21.     private Panel panel2;
  22.     private Panel panel3;
  23.     private Button price1;
  24.     private Button price2;
  25.     private Button price3;
  26.     private Button price4;
  27.     private Button price5;
  28.     private Button price6;
  29.     private Button price7;
  30.     private Checkbox size1;
  31.     private Checkbox size2;
  32.     private Label sizename;
  33.     private Button soda;
  34.     private TextField totcost;
  35.     private Checkbox type1;
  36.     private Checkbox type2;
  37.     private Label typename;
  38.  
  39.     /** Initializes the applet project */
  40.     public void init()
  41.         	{
  42.     		System.out.println("tedt");
  43.  
  44.     		cbg= new CheckboxGroup();
  45.  
  46.  
  47.         name = new Label();
  48.         ok = new Button();
  49.         cancel = new Button();
  50.         panel1 = new Panel();
  51.         type1 = new Checkbox();
  52.         type2 = new Checkbox();
  53.         size1 = new Checkbox();
  54.         size2 = new Checkbox();
  55.         typename = new Label();
  56.         sizename = new Label();
  57.         flavours = new Label();
  58.         flavour = new Choice();
  59.         panel2 = new Panel();
  60.         price1 = new Button();
  61.         price2 = new Button();
  62.         price3 = new Button();
  63.         price4 = new Button();
  64.         price5 = new Button();
  65.         price6 = new Button();
  66.         price7 = new Button();
  67.         panel3 = new Panel();
  68.         cost = new Label();
  69.         totcost = new TextField();
  70.         paid = new Label();
  71.         amtpaid = new TextField();
  72.         soda = new Button();
  73.  
  74.         setBackground(new Color(0, 105, 0));
  75.         setLayout(null);
  76.  
  77.         name.setAlignment(Label.CENTER);
  78.         name.setBackground(new Color(204, 255, 204));
  79.         name.setFont(new Font("Algerian", 3, 24));
  80.         name.setForeground(new Color(0, 0, 0));
  81.         name.setText("TaStY SoDa");
  82.         add(name);
  83.         name.setBounds(20, 10, 630, 40);
  84.         name.getAccessibleContext().setAccessibleName("TaStY SoDa");
  85.  
  86.         ok.setBackground(new Color(153, 255, 153));
  87.         ok.setFont(new Font("Arial", 3, 12));
  88.         ok.setLabel("OK");
  89.         add(ok);
  90.         ok.setBounds(140, 250, 80, 23);
  91.  
  92.         cancel.setBackground(new Color(153, 255, 153));
  93.         cancel.setFont(new Font("Arial", 3, 12));
  94.         cancel.setLabel("CANCEL");
  95.         add(cancel);
  96.         cancel.setBounds(262, 250, 80, 23);
  97.  
  98.         panel1.setBackground(new Color(204, 255, 204));
  99.         panel1.setLayout(null);
  100.  
  101. 		//cbg = new CheckboxGroup();
  102.         type1.setFont(new Font("Century Gothic", 1, 14));
  103.         type1 = new Checkbox("Regular",cbg,true);
  104.         panel1.add(type1);
  105.         type1.setBounds(130, 70, 90, 23);
  106.         //type1.addItemListener(this);
  107.  
  108. 		//cbg = new CheckboxGroup();
  109.         type2.setFont(new Font("Century Gothic", 1, 14));
  110.         type2= new Checkbox("Diet",cbg,false);
  111.         panel1.add(type2);
  112.         type2.setBounds(280, 70, 53, 23);
  113.         //type2.addItemListener(this);
  114.  
  115. 		type1.addItemListener(this);
  116. 		type2.addItemListener(this);
  117.  
  118. 		type1.addItemListener(new ItemListener() {
  119.             public void itemStateChanged(ItemEvent evt) {
  120.                 type1ItemStateChanged(evt);
  121.             }
  122.         });
  123.  
  124.         type2.addItemListener(new ItemListener() {
  125.             public void itemStateChanged(ItemEvent evt) {
  126.                 type2ItemStateChanged(evt);
  127.             }
  128.         });
  129. 		//cbg1 = new CheckboxGroup();
  130.         size1.setFont(new Font("Century Gothic", 1, 14));
  131.         size1.setLabel("10 oz - (1.60 $)");
  132.         panel1.add(size1);
  133.         size1.setBounds(130, 110, 125, 23);
  134.         //size1.addItemListener(this);
  135.  
  136. 		//cbg1 = new CheckboxGroup();
  137.         size2.setFont(new Font("Century Gothic", 1, 14));
  138.         size2.setLabel("16 oz - (2.00 $)");
  139.         panel1.add(size2);
  140.         size2.setBounds(280, 110, 125, 23);
  141.         //size2.addItemListener(this);
  142.  
  143.         typename.setAlignment(Label.CENTER);
  144.         typename.setBackground(new Color(153, 255, 153));
  145.         typename.setFont(new Font("Dialog", 1, 13));
  146.         typename.setText("Type");
  147.         panel1.add(typename);
  148.         typename.setBounds(10, 70, 70, 22);
  149.  
  150.         sizename.setAlignment(Label.CENTER);
  151.         sizename.setBackground(new Color(153, 255, 153));
  152.         sizename.setFont(new Font("Dialog", 1, 13));
  153.         sizename.setText("Size");
  154.         panel1.add(sizename);
  155.         sizename.setBounds(10, 110, 70, 22);
  156.  
  157.         flavours.setAlignment(Label.CENTER);
  158.         flavours.setBackground(new Color(153, 255, 153));
  159.         flavours.setFont(new Font("Arial", 1, 13));
  160.         flavours.setForeground(new Color(0, 51, 51));
  161.         flavours.setText("Flavours");
  162.         panel1.add(flavours);
  163.         flavours.setBounds(10, 20, 70, 19);
  164.  
  165.         flavour.add("Cola");
  166.         flavour.add("Orange");
  167.         flavour.add("Lime");
  168.         flavour.setFont(new Font("Candara", 0, 12));
  169.         panel1.add(flavour);
  170.         flavour.setBounds(130, 20, 180, 19);
  171.  
  172.         add(panel1);
  173.         panel1.setBounds(20, 80, 430, 150);
  174.  
  175.         panel2.setBackground(new Color(204, 255, 204));
  176.         panel2.setLayout(null);
  177.  
  178.         price1.setBackground(new Color(153, 153, 0));
  179.         price1.setFont(new Font("Dialog", 1, 12));
  180.         price1.setLabel("10 cents");
  181.         panel2.add(price1);
  182.         price1.setBounds(40, 20, 70, 24);
  183.  
  184.         price2.setBackground(new Color(153, 153, 0));
  185.         price2.setFont(new Font("Dialog", 1, 12));
  186.         price2.setLabel("20 cents");
  187.         panel2.add(price2);
  188.         price2.setBounds(40, 60, 70, 24);
  189.  
  190.         price3.setBackground(new Color(153, 153, 0));
  191.         price3.setFont(new Font("Dialog", 1, 12));
  192.         price3.setLabel("50 cents");
  193.         panel2.add(price3);
  194.         price3.setBounds(40, 100, 70, 24);
  195.  
  196.         price4.setBackground(new Color(153, 153, 0));
  197.         price4.setFont(new Font("Dialog", 1, 12));
  198.         price4.setLabel("1.00 $");
  199.         panel2.add(price4);
  200.         price4.setBounds(40, 140, 70, 24);
  201.  
  202.         price5.setBackground(new Color(153, 153, 0));
  203.         price5.setFont(new Font("Dialog", 1, 12));
  204.         price5.setLabel("2.00 $");
  205.         panel2.add(price5);
  206.         price5.setBounds(40, 180, 70, 24);
  207.  
  208.         price6.setBackground(new Color(153, 153, 0));
  209.         price6.setFont(new Font("Dialog", 1, 12));
  210.         price6.setLabel("5.00 $");
  211.         panel2.add(price6);
  212.         price6.setBounds(40, 220, 70, 24);
  213.  
  214.         price7.setBackground(new Color(153, 153, 0));
  215.         price7.setFont(new Font("Dialog", 1, 12));
  216.         price7.setLabel("10.00 $");
  217.         panel2.add(price7);
  218.         price7.setBounds(40, 260, 70, 24);
  219.  
  220.         add(panel2);
  221.         panel2.setBounds(500, 100, 150, 300);
  222.  
  223.         panel3.setBackground(new Color(204, 255, 204));
  224.         panel3.setLayout(null);
  225.  
  226.         cost.setAlignment(Label.CENTER);
  227.         cost.setBackground(new Color(153, 255, 153));
  228.         cost.setFont(new Font("Dialog", 1, 13));
  229.         cost.setText("Total Cost");
  230.         panel3.add(cost);
  231.         cost.setBounds(10, 30, 80, 22);
  232.  
  233.         totcost.setBackground(new Color(255, 255, 255));
  234.         panel3.add(totcost);
  235.         totcost.setBounds(150, 30, 120, 20);
  236.  
  237.         paid.setAlignment(Label.CENTER);
  238.         paid.setBackground(new Color(153, 255, 153));
  239.         paid.setFont(new Font("Dialog", 1, 13));
  240.         paid.setText("Amount Paid");
  241.         panel3.add(paid);
  242.         paid.setBounds(10, 70, 90, 22);
  243.         panel3.add(amtpaid);
  244.         amtpaid.setBounds(150, 70, 120, 20);
  245.  
  246.         add(panel3);
  247.         panel3.setBounds(70, 310, 330, 110);
  248.  
  249.         soda.setBackground(new Color(153, 255, 153));
  250.         soda.setFont(new Font("Arial", 3, 14));
  251.         soda.setLabel("Take Soda and change");
  252.  
  253.         soda.addActionListener(new ActionListener() 
  254.         	{
  255.             public void actionPerformed(ActionEvent evt) 
  256.             	{
  257.                 sodaActionPerformed(evt);
  258.             	}
  259.         	});
  260.         add(soda);
  261.         soda.setBounds(130, 450, 210, 25);
  262.     }// </editor-fold>
  263.  
  264.     private void sodaActionPerformed(ActionEvent evt) 
  265.     	{
  266.         // TODO add your handling code here:
  267. /*   			if (flavour = "Lime")
  268.    			{
  269.    				type2.setVisible(false);
  270.    			}
  271.    			
  272.    			else  
  273.    			{
  274.    				type2.setVisible(true);
  275.    			}*/
  276.    				System.out.println("test");	
  277.    		}
  278.    		private void type1ItemStateChanged(ItemEvent evt)
  279.    		{
  280.  
  281.    			System.out.println("test");	
  282.    		}
  283.  
  284.    			private void type2ItemStateChanged(ItemEvent evt)
  285.    		{
  286.  
  287.    			System.out.println("test2");	
  288.    		}
  289.  
  290.         public void actionPerformed(ActionEvent evt)
  291.         {
  292.         	repaint();
  293.         }
  294.         public void paint(Graphics g) 
  295.              	{
  296.              		System.out.println("test");
  297.  
  298.  
  299. }

C:\Documents and Settings\Lich™\Desktop\hashedited.java:5: hashedited is not abstract and does not override abstract method itemStateChanged(java.awt.event.ItemEvent) in java.awt.event.ItemListener
public class hashedited extends Applet implements ItemListener
Last edited by Ancient Dragon; Aug 9th, 2008 at 4:47 pm. Reason: add code tags
Reputation Points: -1
Solved Threads: 4
Junior Poster in Training
lich is offline Offline
78 posts
since May 2008
Permalink
Aug 9th, 2008
0

Re: i need urgent help. this error cmoing. i dont know what to do

Anytime you implement any type of Listener in Java, you need to implement at least one function. With ActionListener, it's "actionPerformed". With ItemListener, it's "itemStateChanged". Always type in "ItemListener", or whatever Listener you are using, into google, find a link that takes you to a Java documentation page, then scroll down to the "Method Summary" portion of the page. Make sure you have those functions in your program, even if they are empty.

http://java.sun.com/j2se/1.5.0/docs/...vent.ItemEvent)
Featured Poster
Reputation Points: 2614
Solved Threads: 687
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VernonDozier is offline Offline
5,372 posts
since Jan 2008
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Aug 9th, 2008
0

Re: i need urgent help. this error cmoing. i dont know what to do

Click to Expand / Collapse  Quote originally posted by VernonDozier ...
Anytime you implement any type of Listener in Java, you need to implement at least one function. With ActionListener, it's "actionPerformed". With ItemListener, it's "itemStateChanged". Always type in "ItemListener", or whatever Listener you are using, into google, find a link that takes you to a Java documentation page, then scroll down to the "Method Summary" portion of the page. Make sure you have those functions in your program, even if they are empty.

http://java.sun.com/j2se/1.5.0/docs/...vent.ItemEvent)

but i have put that two rite.. its there...
Reputation Points: -1
Solved Threads: 4
Junior Poster in Training
lich is offline Offline
78 posts
since May 2008
Permalink
Aug 9th, 2008
0

Re: i need urgent help. this error cmoing. i dont know what to do

take out ItemListener in your class statement and take out the .addItemListener(this) call,

the reason is that you are making an abstract item listener with the second set of calls to addItemListener, and your class isn't acting as the listener at all
Reputation Points: 73
Solved Threads: 22
Posting Pro in Training
sciwizeh is offline Offline
423 posts
since Jun 2008
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Aug 12th, 2008
0

Re: i need urgent help. this error cmoing. i dont know what to do

ItemListener is an interface
u r class is implemented with ItemListener
once u implement the Listeners u must define the abstract methods
just declare those abstract methods
without define the abstract methods u got an error
Reputation Points: 10
Solved Threads: 0
Newbie Poster
vigneswara is offline Offline
5 posts
since Aug 2008

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.
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