求java圖形界面樹類編程源碼舉例。類似windows資源管理器那樣的。如附圖，2層2項即可。

Container?contentPane=null;

DefaultMutableTreeNode?treeNode=new?DefaultMutableTreeNode("我的電腦");

DefaultMutableTreeNode?treeNode1=new?DefaultMutableTreeNode("網絡");

DefaultMutableTreeNode?treeNode2=new?DefaultMutableTreeNode("硬盤");

DefaultMutableTreeNode?treeNode1_1=new?DefaultMutableTreeNode("無限");

DefaultMutableTreeNode?treeNode1_2=new?DefaultMutableTreeNode("有限");

DefaultMutableTreeNode?treeNode2_1=new?DefaultMutableTreeNode("A");

DefaultMutableTreeNode?treeNode2_2=new?DefaultMutableTreeNode("B");

treeNode.add(treeNode1);

treeNode.add(treeNode2);

treeNode1.add(treeNode1_1);

treeNode1.add(treeNode1_2);

treeNode2.add(treeNode2_1);

treeNode2.add(treeNode2_2);

JTree?tree=new?JTree(treeNode);

contentPane=getContentPane();

JPanel?jp=new?JPanel();

jp.add(tree);

contentPane.add(jp);

this.setSize(300,250);

this.setLocation(400,?300);

this.setVisible(true);

}