How to switch Display between different classes in Java ME

Question

I am developing a Java ME program. The different forms are located in separate classes. I tried to switch display between main MIDlet and a class and succeeded. How to do the same between two classes? I am just a beginner in Java ME.

Answer 1

I use following code for the same,

• First display a static Display variable in Midlet

  private static Display display;
  

• Now initialize the dislplay variable in class Constructor

  public MyMidlet() {
       display = Display.getDisplay(this);
  }
  

• Now declare a getDisplay() method in Midlet class

  public static Display getDisplay () {
       return display;
  }
  

Now you can use this getDisplay() method to get the current Display's object and then set any class's form

MyMidlet.getDisplay().setCurrent(form);

Answer 2

Simplification is:

  Display.getDisplay(this).setCurrent(screen);

Where screen is an instance of LCDUI (Form, Alert...) or intance of Canvas object. The this is an instance of the MIDlet