关于使用TreeCellRenderer设置背景颜色无效的问题

在使用JTree时,当我们需要自己定义渲染器时,就需要实现TreeCellRenderer类或者继承DefaultTreeCellRenderer类。不管是实现或者继承,当我们需要改变背景颜色而调用setBackground()方法时,设置可能无效(有意思的是设置前景颜色setForeground()确是有效的)。出现这种情况,我们就需要加上这样的语句:

this.setOpaque(true);

setOpaque方法用于设置控件是否透明。至于为什么设置透明就能使setBackground()方法有效,LZ表示自己所知甚少。
——————————————————————————————
参考:http://stackoverflow.com/questions/16500414/treecellrenderer-how-to-set-background-color

package BookTest; import java.awt.*; import java.awt.event.*; import java.util.AbstractQueue; import java.util.Vector; import javax.swing.*; import javax.swing.table.*; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.DefaultTreeCellRenderer; import javax.swing.tree.DefaultTreeModel; import javax.swing.tree.TreeSelectionModel; import javax.swing.event.*; import javax.swing.table.TableColumnModel; //import DbHelp.OperatorJobs; import Dao.ArrayBook; public class Test extends JFrame { public JPanel jp=null; public String aa; //JTable jTable1 = new JTable(); public JTable jTable1=null; private JTree jTree1; DefaultTableModel mode; private JScrollPane scrollPane = null; DefaultMutableTreeNode node; JButton[] btn={new JButton("增加"),new JButton("删除"),new JButton("修改"),new JButton("查询"),new JButton("重置")}; public JTextField[] txt ={new JTextField(),new JTextField(),new JTextField(),new JTextField(),new JTextField(),new JTextField()}; public String[] str1={"1","summer","boy","20","",""}; public String[] str2={"2","wulei","girl","19","",""}; public String[] str3={"3","west","boy","20","",""}; public String[] str4={"4","fish","girl","18","",""}; public String[] str5={"5","youku","boy","21","",""}; public String[] str6={"6","aa","boy","21","",""}; public String[][] tempData1={str1,str2,str3,str4,str5,str6}; public String[] aa1={"1","summer","boy","20","123","123"}; public String[] aa2={"2","wulei","girl","19","123",""}; public String[] aa3={"3","west","boy","20","123",""}; public String[] aa4={"4","fish","girl","18","1",""}; public String[] aa5={"5","youku","boy","21","12",""}; public String[] aa6={"6","aa","boy","21","123",""}; public String[][] tempData4={aa1,aa2,aa3,aa4,aa5,aa6}; //设置表头数据 public String[] tempTitle={"ID","标题","内容","作者","时间","是否选中"}; //设置表格的数据集合 Vector v1=new Vector(); Vecto
评论 1
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值