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Thread: Timer Action Listener

  1. #1
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    Default Timer Action Listener

    Whats wrong with my code ?? Whenever i click start button it will just printout start to the jtextfield it wont start the time .
    import java.awt.*;
    import java.util.Date;
     
    import javax.swing.*;
     
    import java.awt.BorderLayout;
     
    import java.awt.Dimension;
    import java.awt.event.*;
     
     
    public class MicroWave extends JFrame implements ActionListener {
     
     
     
    		  JButton n0,n1,n2,n3,n4;
    		  JButton n5,n6,n7,n8,n9;
    		  JButton start,stop;
    		   JPanel keyButtons;
     
    		  JPanel South;
    		  JPanel North;
    		  JPanel West;
    		  JPanel East;
    		  JPanel time;
    		Timer starter;
    		  JTextField screen;
     
    			  long cd = 1800000; 
    			   java.text.SimpleDateFormat tformat = new java.text.SimpleDateFormat(" hh  : mm : ss");  
    			     JTextField timer = new JTextField(tformat.format(new Date(cd)),JTextField.CENTER);  
     
    			public void actionPerformed(ActionEvent arg0) {
     
    				if(timer.getText().equals("00:00:00"))
    				{
    					timer.setText("");
    					JButton source = (JButton)arg0.getSource();
    					timer.replaceSelection(arg0.getActionCommand());
    				}
    				else{
    					JButton source = (JButton)arg0.getSource();
    					timer.replaceSelection(arg0.getActionCommand());
    				}
     
    				 if(arg0.getActionCommand()=="Start"){
    				 ActionListener al = new ActionListener(){  
    				      long x = cd - 1000;  
    				      public void actionPerformed(ActionEvent ae){ 
     
     
    				    	  timer.setText(tformat.format(new Date(x)));  
    				          x -= 1000;}};  
    				     starter = new Timer(1000, al);
    				     starter.start();  
    				      }
    			}
     
    		public MicroWave(){
     
     
     
     
     
     
    		n1 = new JButton("1"); 	
    		n2 = new JButton("2"); 
    		n3 = new JButton("3"); 
    		n4 = new JButton("4"); 
    		n5 = new JButton("5"); 
    		n6 = new JButton("6"); 
    		n7 = new JButton("7"); 
    		n8 = new JButton("8"); 
    		n9 = new JButton("9"); 
    		start = new JButton("START"); 
    		n0 = new JButton("0"); 
    		stop = new JButton("STOP"); 
     
    		North= new JPanel(new BorderLayout(260,0));
    		South= new JPanel(new FlowLayout(FlowLayout.RIGHT));
    		West = new JPanel(new FlowLayout(FlowLayout.LEFT));
    		East = new JPanel(new FlowLayout(FlowLayout.RIGHT));
     
     
    		keyButtons = new JPanel();
     
    		time = new JPanel();
    		screen = new JTextField("SCREEN");
     
     
     
     
    		West.add(screen);
    		time.add(timer);
     
    		North.add(time,BorderLayout.EAST);
    		South = new JPanel();
     
    	}
     
    		public void launchFrame(){
     
    			keyButtons.setLayout(new GridLayout(4,3));
     
    			South.setPreferredSize(new Dimension(100,100));
    			screen.setPreferredSize(new Dimension(440,700));
    			timer.setPreferredSize(new Dimension(227,70));
    			keyButtons.setPreferredSize(new Dimension(235,250));
    			screen.add(new JTextField(8));
    			//INPUT WILL START AT THE CENTER
    			 timer.setHorizontalAlignment(JTextField.CENTER);
    			 screen.setHorizontalAlignment(JTextField.CENTER);
    			 //COLOR FOR JTEXTFIELD BACKGROUND//
    			 timer.setBackground(Color.DARK_GRAY); 
    			 screen.setBackground(Color.DARK_GRAY); 
    			 //FONT COLOR //
    			 screen.setForeground(Color.RED);  
    			 timer.setForeground(Color.RED);
    			 //FONT SIZE//
    				screen.setFont(new Font("Tahoma",1,55));
    				timer.setFont(new Font("BOLD",1,35));
     
    			keyButtons.add(n1);
    			keyButtons.add(n2);
    			keyButtons.add(n3);
    			keyButtons.add(n4);
    			keyButtons.add(n5);
    			keyButtons.add(n6);
    			keyButtons.add(n7);
    			keyButtons.add(n8);
    			keyButtons.add(n9);
    			keyButtons.add(start);
    			keyButtons.add(n0);
    			keyButtons.add(stop);
     
     
     
     
     
    			n1.addActionListener(this);
    			n2.addActionListener(this);
    			n3.addActionListener(this);
    			n4.addActionListener(this);
    			n5.addActionListener(this);
    			n6.addActionListener(this);
    			n7.addActionListener(this);
    			n8.addActionListener(this);
    			n9.addActionListener(this);
    			n0.addActionListener(this);
    			start.addActionListener(this);
    			stop.addActionListener(this);
     
     
     
     
     
     
    			JFrame dos = new JFrame();
    			dos.setSize(700,500);
    			dos.add(keyButtons,BorderLayout.EAST);
     
    			dos.add(screen,BorderLayout.WEST);
     
    			dos.add(North,BorderLayout.NORTH);
    			dos.add(South,BorderLayout.SOUTH);
    			dos.setVisible(true);
    			dos.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
     
     
    		}
     
     
    		public static void main (String args[]){
    			MicroWave GUI = new MicroWave();
    			GUI.launchFrame();
     
     
     
     
     
     
    		}
     
     
     
     
    }


    --- Update ---

    if i remove IF S TATEMET it will start the countdown even if i click any jbuttons
    import java.awt.*;
    import java.util.Date;
     
    import javax.swing.*;
     
    import java.awt.BorderLayout;
     
    import java.awt.Dimension;
    import java.awt.event.*;
     
     
    public class MicroWave extends JFrame implements ActionListener {
     
     
     
    		  JButton n0,n1,n2,n3,n4;
    		  JButton n5,n6,n7,n8,n9;
    		  JButton start,stop;
    		   JPanel keyButtons;
     
    		  JPanel South;
    		  JPanel North;
    		  JPanel West;
    		  JPanel East;
    		  JPanel time;
    		Timer starter;
    		  JTextField screen;
     
    			  long cd = 1800000; 
    			   java.text.SimpleDateFormat tformat = new java.text.SimpleDateFormat(" hh  : mm : ss");  
    			     JTextField timer = new JTextField(tformat.format(new Date(cd)),JTextField.CENTER);  
     
    			public void actionPerformed(ActionEvent arg0) {
     
    				if(timer.getText().equals("00:00:00"))
    				{
    					timer.setText("");
    					JButton source = (JButton)arg0.getSource();
    					timer.replaceSelection(arg0.getActionCommand());
    				}
    				else{
    					JButton source = (JButton)arg0.getSource();
    					timer.replaceSelection(arg0.getActionCommand());
    				}
     
     
    				 ActionListener al = new ActionListener(){  
    				      long x = cd - 1000;  
    				      public void actionPerformed(ActionEvent ae){ 
     
     
    				    	  timer.setText(tformat.format(new Date(x)));  
    				          x -= 1000;}};  
    				     starter = new Timer(1000, al);
    				     starter.start();  
    				      }
     
     
    		public MicroWave(){
     
     
     
     
     
     
    		n1 = new JButton("1"); 	
    		n2 = new JButton("2"); 
    		n3 = new JButton("3"); 
    		n4 = new JButton("4"); 
    		n5 = new JButton("5"); 
    		n6 = new JButton("6"); 
    		n7 = new JButton("7"); 
    		n8 = new JButton("8"); 
    		n9 = new JButton("9"); 
    		start = new JButton("START"); 
    		n0 = new JButton("0"); 
    		stop = new JButton("STOP"); 
     
    		North= new JPanel(new BorderLayout(260,0));
    		South= new JPanel(new FlowLayout(FlowLayout.RIGHT));
    		West = new JPanel(new FlowLayout(FlowLayout.LEFT));
    		East = new JPanel(new FlowLayout(FlowLayout.RIGHT));
     
     
    		keyButtons = new JPanel();
     
    		time = new JPanel();
    		screen = new JTextField("SCREEN");
     
     
     
     
    		West.add(screen);
    		time.add(timer);
     
    		North.add(time,BorderLayout.EAST);
    		South = new JPanel();
     
    	}
     
    		public void launchFrame(){
     
    			keyButtons.setLayout(new GridLayout(4,3));
     
    			South.setPreferredSize(new Dimension(100,100));
    			screen.setPreferredSize(new Dimension(440,700));
    			timer.setPreferredSize(new Dimension(227,70));
    			keyButtons.setPreferredSize(new Dimension(235,250));
    			screen.add(new JTextField(8));
    			//INPUT WILL START AT THE CENTER
    			 timer.setHorizontalAlignment(JTextField.CENTER);
    			 screen.setHorizontalAlignment(JTextField.CENTER);
    			 //COLOR FOR JTEXTFIELD BACKGROUND//
    			 timer.setBackground(Color.DARK_GRAY); 
    			 screen.setBackground(Color.DARK_GRAY); 
    			 //FONT COLOR //
    			 screen.setForeground(Color.RED);  
    			 timer.setForeground(Color.RED);
    			 //FONT SIZE//
    				screen.setFont(new Font("Tahoma",1,55));
    				timer.setFont(new Font("BOLD",1,35));
     
    			keyButtons.add(n1);
    			keyButtons.add(n2);
    			keyButtons.add(n3);
    			keyButtons.add(n4);
    			keyButtons.add(n5);
    			keyButtons.add(n6);
    			keyButtons.add(n7);
    			keyButtons.add(n8);
    			keyButtons.add(n9);
    			keyButtons.add(start);
    			keyButtons.add(n0);
    			keyButtons.add(stop);
     
     
     
     
     
    			n1.addActionListener(this);
    			n2.addActionListener(this);
    			n3.addActionListener(this);
    			n4.addActionListener(this);
    			n5.addActionListener(this);
    			n6.addActionListener(this);
    			n7.addActionListener(this);
    			n8.addActionListener(this);
    			n9.addActionListener(this);
    			n0.addActionListener(this);
    			start.addActionListener(this);
    			stop.addActionListener(this);
     
     
     
     
     
     
    			JFrame dos = new JFrame();
    			dos.setSize(700,500);
    			dos.add(keyButtons,BorderLayout.EAST);
     
    			dos.add(screen,BorderLayout.WEST);
     
    			dos.add(North,BorderLayout.NORTH);
    			dos.add(South,BorderLayout.SOUTH);
    			dos.setVisible(true);
    			dos.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
     
     
    		}
     
     
    		public static void main (String args[]){
    			MicroWave GUI = new MicroWave();
    			GUI.launchFrame();
     
     
     
     
     
     
    		}
     
     
     
     
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Timer Action Listener

    The first code uses == vs the equals() method to compare Strings.

    it will start the countdown even if i click any jbuttons
    Is that wrong? What is it supposed to do?
    If you don't understand my answer, don't ignore it, ask a question.

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