explain a code for swing

[kalar]

I want to draw a text on a JPanel.I know about method drawString but i can't make it work. Then i found a code in the Internet :

learning java

but i can't understand how works? If i put in str_x and str_y , 0 and 0 it doesn't prints me anything. If i leave them as it is it prints me the string but only in the center of x-axis, look

if i put something else as example drawString("hi", 20,20) still doesn't print anything
thanks in advance!

[kalar]

because i can't edit my post:
i have these problmes and with other draw... methods. So i guess my mistake is in the way that i get the dimensions? What should i do in order to work?

[JosAH]

because i can't edit my post:
i have these problmes and with other draw... methods. So i guess my mistake is in the way that i get the dimensions? What should i do in order to work?

For starters: if you want to print a String starting at position x, y, the left most
position will be x and the *baseline* of the String will be at position y, i.e. only
the descenders of the characters will be below (i.e. a larger y coordinate) that
baseline. If you want to print a String at position 0,0 most if not all of the String
won't be visible (above the visible area).

Another remark: if you print characters (a String) in red on a red background
you won't see them of course; are you sure you have set the foreground color
to something else before you draw the String?

kind regards,

Jos

[kalar]

Thank you Jos i understand how works,(i put something like 0,10 and i saw the letters on the screen)

[JosAH]

Thank you Jos i understand how works,(i put something like 0,10 and i saw the letters on the screen)

Good; moral of the story: always read the darn^H^H^H^H fine API documentation
before you even *think* of typing something in front of your computer. It can only
lead to misery; proof: see the current state of ICT in the world ;-)

kind regards,

Jos