swing快速入门（四十二）JTree的基本创建

本文主要是介绍swing快速入门（四十二）JTree的基本创建，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

注释很详细，直接上代码

新增内容

🔦JTree的创建

🔦设置节点之间的连线

🔦设置节点之间的水平分割线

🔦设置根节点的展开折叠图标

🔦设置是否隐藏根节点

package swing31_40;import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;public class swing_test_40 {JFrame jFrame = new JFrame("简单树");JTree tree;DefaultMutableTreeNode root;DefaultMutableTreeNode guangdong;DefaultMutableTreeNode guangxi;DefaultMutableTreeNode foshan;DefaultMutableTreeNode shantou;DefaultMutableTreeNode guilin;DefaultMutableTreeNode nanning;public void init(){//依次创建所有结点root = new DefaultMutableTreeNode("中国");guangdong = new DefaultMutableTreeNode("广东");guangxi = new DefaultMutableTreeNode("广西");foshan = new DefaultMutableTreeNode("佛山");shantou = new DefaultMutableTreeNode("汕头");guilin = new DefaultMutableTreeNode("桂林");nanning = new DefaultMutableTreeNode("南宁");//通过add()方法建立父子层级关系guangdong.add(foshan);guangdong.add(shantou);guangxi.add(guilin);guangxi.add(nanning);root.add(guangdong);root.add(guangxi);//依据根结点，创建JTreetree = new JTree(root);//设置结点之间没有连接线//tree.putClientProperty( "JTree.lineStyle", "None");//设置结点之间有水平分割线//tree.putClientProperty("JTree.lineStyle" , "Horizontal");//设置根结点有"展开、折叠"图标//tree.setShowsRootHandles(true);//隐藏根结点//tree.setRootVisible(false);//设置滚动jFrame.add(new JScrollPane(tree));jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭窗口jFrame.pack();//自动调整窗口大小jFrame.setVisible(true);//显示窗口}public static void main(String[] args) {//启动程序new swing_test_40().init();}
}