Java 在JTree中更改节点
请任何人帮我写密码! 我在ArrayList中有一些数据,我用JTree显示它。我希望能够编辑我的数据并将其保存在我的容器中。现在视觉部分工作得很完美,但在我的ArrayList中没有任何变化。我怎样才能达到我的目标 我的JTree就是这样的:Java 在JTree中更改节点,java,swing,jtree,Java,Swing,Jtree,请任何人帮我写密码! 我在ArrayList中有一些数据,我用JTree显示它。我希望能够编辑我的数据并将其保存在我的容器中。现在视觉部分工作得很完美,但在我的ArrayList中没有任何变化。我怎样才能达到我的目标 我的JTree就是这样的: public TreeNode makeTree() { ArrayList <Factory> factories = myparser.parseXml(); DefaultMutable
public TreeNode makeTree()
{
ArrayList <Factory> factories = myparser.parseXml();
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Factories");
for (int i=0; i<factories.size(); ++i)
{
Factory factory = factories.get(i);
DefaultMutableTreeNode factory1 = new DefaultMutableTreeNode(factory.getName());
root.add(factory1);
for (int j=0; j<factory.getDepartments().size(); ++j)
{
Department department = factory.getDepartments().get(j);
DefaultMutableTreeNode department1 = new DefaultMutableTreeNode(department.getName());
factory1.add(department1);
for (int k=0; k<department.getSections().size(); ++k)
{
Section section = department.getSections().get(k);
DefaultMutableTreeNode section1 = new DefaultMutableTreeNode(section.getName());
department1.add(section1);
for (int m=0; m<section.getProducts().size(); ++m)
{
Product product = section.getProducts().get(m);
DefaultMutableTreeNode product1 = new DefaultMutableTreeNode(product.getId());
section1.add(product1);
DefaultMutableTreeNode product1_amount = new DefaultMutableTreeNode(product.getAmount());
product1.add(product1_amount);
}
}
}
}
return root;
}
以下是我在列表中的课程依据:
import java.util.ArrayList;
public class Factory {
private String name;
private ArrayList <Department> departments;
public Factory(String name, ArrayList<Department> departments)
{this.name = name; this.departments = departments;}
public String getName()
{
return this.name;
}
public void setName(String name)
{
this.name = name;
}
public void addDepartment(Department department)
{
departments.add(department);
}
public ArrayList<Department> getDepartments()
{
return this.departments;
}
public void setDepartments(ArrayList<Department> departments)
{
this.departments = departments;
}
}
import java.util.ArrayList;
public class Department {
private String name;
private ArrayList <Section> sections;
public Department(String name, ArrayList<Section> sections)
{this.name = name; this.sections = sections;}
public String getName()
{
return this.name;
}
public void setName(String name)
{
this.name = name;
}
public void addSection(Section section)
{
sections.add(section);
}
public ArrayList<Section> getSections()
{
return this.sections;
}
public void setSections(ArrayList<Section> sections)
{
this.sections = sections;
}
}
import java.util.ArrayList;
public class Section {
private String name;
private ArrayList<Product> products;
public Section(String name, ArrayList<Product> products)
{this.name = name; this.products = products;}
public String getName()
{
return this.name;
}
public void setName(String name)
{
this.name = name;
}
public void addProduct(Product product)
{
products.add(product);
}
public ArrayList<Product> getProducts()
{
return this.products;
}
public void setProducts(ArrayList<Product> products)
{
this.products = products;
}
}
public class Product {
private String id;
private int amount;
public Product (String id, int amount){this.id = id; this.amount = amount;}
public String getId()
{
return this.id;
}
public void setId(String id)
{
this.id = id;
}
public int getAmount()
{
return this.amount;
}
public void setAmount(int amount)
{
this.amount = amount;
}
}
import java.util.ArrayList;
公营工厂{
私有字符串名称;
私营ArrayList部门;
公共工厂(字符串名称、ArrayList部门)
{this.name=name;this.departments=departments;}
公共字符串getName()
{
返回此.name;
}
公共void集合名(字符串名)
{
this.name=名称;
}
公共部门(部门)
{
部门。添加(部门);
}
公共阵列列表getDepartments()
{
将此文件退还给各部门;
}
公共部门(ArrayList部门)
{
这个.部门=部门;
}
}
导入java.util.ArrayList;
公共课系{
私有字符串名称;
私有数组列表部分;
公共部门(字符串名称、ArrayList部分)
{this.name=name;this.sections=sections;}
公共字符串getName()
{
返回此.name;
}
公共void集合名(字符串名)
{
this.name=名称;
}
公共无效添加部分(部分)
{
节。添加(节);
}
公共数组列表getSections()
{
将此文件退还给我;
}
公共无效集合节(ArrayList节)
{
本节=节;
}
}
导入java.util.ArrayList;
公共课组{
私有字符串名称;
私人ArrayList产品;
公共部分(字符串名称、ArrayList产品)
{this.name=name;this.products=products;}
公共字符串getName()
{
返回此.name;
}
公共void集合名(字符串名)
{
this.name=名称;
}
公共产品(产品)
{
产品。添加(产品);
}
公共阵列列表getProducts()
{
退回本产品;
}
公共产品(ArrayList产品)
{
这一点。产品=产品;
}
}
公共类产品{
私有字符串id;
私人整数金额;
公共产品(字符串id,整数金额){this.id=id;this.amount=amount;}
公共字符串getId()
{
返回此.id;
}
公共无效集合id(字符串id)
{
this.id=id;
}
公共整数getAmount()
{
退还此金额;
}
公共无效设置金额(整数金额)
{
这个。金额=金额;
}
}
您只需向JTree
节点添加新值,还需要向部门
/工厂
实例添加新值
尝试下一个示例,其中MyObject
是表示TreeNode
的类。“add”是一个按钮,它向JTree和MyObject实例添加一个新对象,“print”打印到控制台当前子对象:
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class TestFrame extends JFrame {
private JTree tree;
private DefaultTreeModel model;
public TestFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
pack();
setVisible(true);
}
private void init() {
TreeNode root = getNodes();
tree = new JTree(model = new DefaultTreeModel(root));
tree.setRootVisible(false);
JButton add = new JButton("add new");
add.addActionListener(getAddActionListener());
JButton print = new JButton("print childs");
print.addActionListener(getPrintActionListener());
JPanel btns = new JPanel();
btns.add(add);
btns.add(print);
add(new JScrollPane(tree));
add(btns,BorderLayout.SOUTH);
}
private ActionListener getPrintActionListener() {
return new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (selectedNode == null){
return;
}
MyObject obj = (MyObject) selectedNode.getUserObject();
System.out.println(obj.childs);
}
};
}
private ActionListener getAddActionListener() {
return new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (selectedNode == null){
return;
}
MyObject obj = (MyObject) selectedNode.getUserObject();
MyObject newChild = new MyObject(obj.name+"-"+(obj.childs.size()+1));
obj.childs.add(newChild);
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(newChild);
model.insertNodeInto(newNode, selectedNode,selectedNode.getChildCount());
TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
}
};
}
private TreeNode getNodes() {
MyObject obj1 = new MyObject("1");
MyObject obj2 = new MyObject("1-1");
obj1.childs.add(obj2);
obj2.childs.add(new MyObject("2-1"));
obj2.childs.add(new MyObject("2-2"));
obj1.childs.add(new MyObject("1-2"));
obj1.childs.add(new MyObject("1-3"));
DefaultMutableTreeNode root = new DefaultMutableTreeNode();
construct(obj1,root);
return root;
}
private void construct(MyObject obj1, DefaultMutableTreeNode root) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(obj1);
root.add(node);
for(MyObject o : obj1.childs){
construct(o,node);
}
}
public static void main(String... strings) {
new TestFrame();
}
private class MyObject{
private String name;
private List<MyObject> childs = new ArrayList<>();
public MyObject(String name) {
this.name = name;
}
@Override
public String toString() {
return name;
}
}
}
导入java.awt.BorderLayout;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.util.ArrayList;
导入java.util.List;
导入javax.swing.JButton;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.JScrollPane;
导入javax.swing.JTree;
导入javax.swing.tree.DefaultMutableTreeNode;
导入javax.swing.tree.DefaultTreeModel;
导入javax.swing.tree.TreeNode;
导入javax.swing.tree.TreePath;
公共类TestFrame扩展了JFrame{
私有JTree树;
私有DefaultTreeModel模型;
公共测试框架(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
包装();
setVisible(真);
}
私有void init(){
TreeNode root=getNodes();
tree=newjtree(model=newdefaulttreemodel(root));
tree.setRootVisible(false);
JButton add=新JButton(“添加新”);
add.addActionListener(getAddActionListener());
JButton print=新JButton(“print child”);
addActionListener(getPrintActionListener());
JPanel btns=新的JPanel();
btns.add(add);
添加(打印);
添加(新的JScrollPane(树));
添加(基站,边界布局。南部);
}
私有ActionListener getPrintActionListener(){
返回新的ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
DefaultMutableTreeNode selectedNode=(DefaultMutableTreeNode)树。getLastSelectedPathComponent();
如果(selectedNode==null){
返回;
}
MyObject obj=(MyObject)selectedNode.getUserObject();
系统输出打印LN(对象childs);
}
};
}
私有ActionListener getAddActionListener(){
返回新的ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
DefaultMutableTreeNode selectedNode=(DefaultMutableTreeNode)树。getLastSelectedPathComponent();
如果(selectedNode==null){
返回;
}
MyObject obj=(MyObject)selectedNode.getUserObject();
MyObject newChild=新的MyObject(obj.name+“-”+(obj.childs.size()+1));
对象childs.add(newChild);
DefaultMutableTreeNode newNode=新的DefaultMutableTreeNode(newChild);
insertNodeInto(newNode、selectedNode、selectedNode.getChildCount());
TreeNode[]节点=model.getPathToRoot(newNode);
树路径=新树路径(节点);
scrollPathToVisible(路径);
}
};
}
私有树节点getNodes(){
MyObject obj1=新的MyObject(“1”);
MyObject obj2=新的MyObject(“1-1”);
obj1.childs.add(obj2);
对象J2.儿童添加(新的MyObject(“2-1”);
对象J2.儿童添加(新的MyObject(“2-2”));
对象J1.childs.add(新的MyObject(“1-2”));
对象J1.childs.add(新的MyObject(“1-3”);
DefaultMutableTreeNode根=新的DefaultMutableTreeNode();
构造(obj1,根);
返回根;
}
私有void构造(MyObject对象J1,DefaultMutableTreeNode根){
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class TestFrame extends JFrame {
private JTree tree;
private DefaultTreeModel model;
public TestFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
pack();
setVisible(true);
}
private void init() {
TreeNode root = getNodes();
tree = new JTree(model = new DefaultTreeModel(root));
tree.setRootVisible(false);
JButton add = new JButton("add new");
add.addActionListener(getAddActionListener());
JButton print = new JButton("print childs");
print.addActionListener(getPrintActionListener());
JPanel btns = new JPanel();
btns.add(add);
btns.add(print);
add(new JScrollPane(tree));
add(btns,BorderLayout.SOUTH);
}
private ActionListener getPrintActionListener() {
return new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (selectedNode == null){
return;
}
MyObject obj = (MyObject) selectedNode.getUserObject();
System.out.println(obj.childs);
}
};
}
private ActionListener getAddActionListener() {
return new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (selectedNode == null){
return;
}
MyObject obj = (MyObject) selectedNode.getUserObject();
MyObject newChild = new MyObject(obj.name+"-"+(obj.childs.size()+1));
obj.childs.add(newChild);
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(newChild);
model.insertNodeInto(newNode, selectedNode,selectedNode.getChildCount());
TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
}
};
}
private TreeNode getNodes() {
MyObject obj1 = new MyObject("1");
MyObject obj2 = new MyObject("1-1");
obj1.childs.add(obj2);
obj2.childs.add(new MyObject("2-1"));
obj2.childs.add(new MyObject("2-2"));
obj1.childs.add(new MyObject("1-2"));
obj1.childs.add(new MyObject("1-3"));
DefaultMutableTreeNode root = new DefaultMutableTreeNode();
construct(obj1,root);
return root;
}
private void construct(MyObject obj1, DefaultMutableTreeNode root) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(obj1);
root.add(node);
for(MyObject o : obj1.childs){
construct(o,node);
}
}
public static void main(String... strings) {
new TestFrame();
}
private class MyObject{
private String name;
private List<MyObject> childs = new ArrayList<>();
public MyObject(String name) {
this.name = name;
}
@Override
public String toString() {
return name;
}
}
}