LWUIT black lines between components

I have next question regarding LWUIT开发者_如何学C:

I have container with child components. A black lines around the child components shown on the screen, how can I remove them?

I tried to install zero option to padding and margin, but it did'nt help.

Check the border style for that child component. And if you using border means set the border to null or create the empty border for that child component.

Note: Ask the question clearly. Because you said child component, But you didn't mention which component you are using as a child component.