jbutton states and events

[Norm]

If you got the reference to the button object using e.getSource(), you could test what state it was in and change it as you wanted.
There are two state values: its color and its text.

[ryuti]

i tried this also

class RM1 implements ActionListener(ActionEvent e) 
{ 
if(getBackground() == GREEN)
 {
setBackground(Color.GREEN);
} 
else
{
 setBackground(Color.RED); 
setText("LIGHT OFF");  
 } 
}

[ryuti]

or this

class RM1 implements ActionListener{

	private Color GREEN;

	@Override
	public void actionPerformed(ActionEvent e) {
		if(e.getSource() == rm1L)
				{
			if(getBackground() == GREEN) 
			{
				setBackground(Color.GREEN); 
				setText("LIGHT ON");
			}
				
		else
		{
			setBackground(Color.RED); 
			setText("LIGHT OFF");
		}
		
	}
	
}

[Norm]

What object's background value are you looking at when you call the getBackground() method?

What is the value of the variable/symbol: GREEN?

Does the code compile? Sort of a waste of time posting code that does not compile without posting the compiler's error messages.

[ryuti]

the code does compile but there is no action

Color GREEN;
GREEN = rm1L.getBackground;

I tried different methods to get it working but no luck. I really cannot afford to loose more time on this. I will add a second button(easier way).
I will have one button for on and one for off.

The assigment is due on Friday and I concentrated on this part too much. I need to do testing, networkingm threadsm which are far more important. The thing is seems to understand those better.

Anyway, many thanks for your assistance!

[Norm]

rm1L.getBackground;

The syntax for method reference ends with ()s
Why is the name of the variable: GREEN? Can't the background be other colors?

Can you write the code to compare the button's current color to the Color.green?

[ryuti]

I think that is the problem. i do not know how to compare the current color to Color.GREEN.
Can be any color. I choose green and red for on and off;

I also changed the variable name(wasn;t right) to:
Color GR = rm1L.getBackground();

[Norm]

Color.green is an instance of a Color object. You could use the Color class's equals() method to compare two color objects.

[ryuti]

Color.green is an instance of a Color object. You could use the Color class's equals() method to compare two color objects.

hi again,

You mentioned a very interesting method, but I could not use it(can't get it working - like I said before new to Java). Because of my lack of time i will leave that one for my spare hours.

I found another way to do what i needm with jToggleButton, Here is my example, maybe someone will need it.

	JToggleButton rm8L = new JToggleButton("LIGHT");
	
	
	rm8L.setSize(new Dimension(79, 23));
	rm8L.setBackground(Color.GRAY);
		
		
		rm8L.addItemListener(new ItemListener(){
			public void itemStateChanged(ItemEvent ie){
				if(rm8L.isSelected()){
					rm8L.setText("LIGHT ON");
					rm8L.setBackground(Color.GREEN);
					}
				else
				{
					rm8L.setText("LIGHT OFF");
					rm8L.setBackground(Color.RED);
				}
			}
			
		});

Thanks again for your assistance!

[Norm]

You would use the equals method like this:
if(aColor.equals(anotherColor)) { ..

[ryuti]

You would use the equals method like this:
if(aColor.equals(anotherColor)) { ..

Yes, I got there at some point but I did not know to to implement that to an action, to change between colors when the button is clicked. Apart from color and text I need to display some other info into a text area(representing the temperature of the room, the energy loss in BTU, the energy needed from solar panels to heat the room and so on...)

I will try that option but not now.