构造子索引
FlowLayout()
FlowLayout(int)
FlowLayout(int, int, int)
方法索引
addLayoutComponent(String, Component)
getAlignment()
getHgap()
getVgap()
layoutContainer(Container)
minimumLayoutSize(Container)
preferredLayoutSize(Container)
removeLayoutComponent(Component)
setAlignment(int)
setHgap(int)
setVgap(int)
toString()
变量索引
CENTER
LEFT
RIGHT