e821. 设置JScrollPane滚动栏
Ascrollbarinascrollpanecanbesettoappearonlyasneeded,alwaysappear,orneverappear.Bydefault,boththeverticalandhorizontalscrollbarsinascrollpaneappearonlywhenneeded...
e822. 监听JScrollPane的滚动
Ascrollbarinascrollpanefiresadjustmenteventswheneveritsvaluechanges.//CreateascrollabletextareaJTextAreatextArea=newJTextArea();JScrollPanepane=newJScrollPane(t...