crystal reports java

+Renderer.setbasepositiveitemlabelposition (Newitemlabelposition (Itemlabelanchor.outside12, Textanchor.baseline_left)); - Renderer.setitemlabelanchoroffset (10D); $ $ //set the distance between parallel bars -Renderer.setitemmargin (0.4); - the plot.setrenderer (renderer); - WuyiString fileName = servletutilities.savechartaspng (chart, 700, 500, session); the returnFileName; - } Wu}1Import= "Com.wcy.chart.b

In Java, list. Remove (removerange, clear is similar) reports the error of unsupportedoperationexception. It turns out that this list is a javasactlist and does not support addition, deletion, and modification operations. Generally, we will use the role list and arraylist. Under what circumstances will the role actlist appear? The list obtained through the arraylist. aslist () function is called javasactli

Listif (Matches.size ()!=0) { for (Searchmatchitem item:matches) { Actuallist.add (Item.getid ()); }}The above code throws a null pointer exception because the list was created without pointing to a referenceChange to the following code.Listif (Matches.size ()!=0) { for (Searchmatchitem item:matches) { Actuallist.add (Item.getid ()); }}The Add method of the Java list reports