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.

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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.