How do i call display.setcurrent

[arnab321]

Hi. I have the midlet class like this in a.java
public class a extends MIDlet{
....
}

now i want to create a static method in this class for changing the current display. How do i do that?
Static Display k= new Display.getDisplay() gives an error
. Please dont just give me links.

[Norm]

gives an error

Please copy and paste the full text of the error message.

[arnab321]

error- non-static variable cannot be referenced from a static method

[Eranga]

So avoid that and code it in different way.

[arnab321]

how? i cant make a new iinstance of a MIDlet, since it will give a security error. and i need to call the display.setcurrent from another class. how can i do that if the methos is not made static?

[DarrylBurke]

Hi. I have the midlet class like this in a.java
public class a extends MIDlet{
....
}

now i want to create a static method in this class for changing the current display. How do i do that?
Static Display k= new Display.getDisplay() gives an error
. Please dont just give me links.

the keyword new is used in conjunction with a constructor. not with a static method. This is how you get a reference to the Display associated with a currently running MIDlet from within the class:

Display display = Display.getDisplay(this);

This cannot be executed in a static method or block as it references the instance alias this.

db

[arnab321]

ok, then plz suggest me another method to call "Display display = Display.getDisplay(this);" from a class outside the midlet class.
if the midlet class is like:class a extends MIDlet{} can i replace "this" with something else, like the class name so that i can use it from an outside class?

[DarrylBurke]

ok, then plz suggest me another method to call "Display display = Display.getDisplay(this);" from a class outside the midlet class.

Three ways:
1) Pass a reference to the MIDlet to the constructor of the other class
2) Pass a reference to the MIDlet's Display.getDisplay(this) to the constructor of the other class
3) Provide a method in your MIDlet that returns Display.getDisplay(this)

if the midlet class is like:class a extends MIDlet{} can i replace "this" with something else, like the class name so that i can use it from an outside class?

No. Read the API.

db