im.getGraphics() ;
public abstract Graphics getGraphics()
Creates a graphics context for drawing to an off-screen image. This method can only be called for off-screen images. Returns:
a graphics context to draw to the off-screen image. 很多方法,去看看jdk的文档,慢慢试
public abstract Graphics getGraphics()
Creates a graphics context for drawing to an off-screen image. This method can only be called for off-screen images. Returns:
a graphics context to draw to the off-screen image. 很多方法,去看看jdk的文档,慢慢试
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