2014-06-10 198 views
0

任何人都可以幫助我使用我的代碼! 我在ArrayLists中有一些數據,我將它顯示爲一個JTree。我希望能夠編輯我的數據並將其保存在我的容器中。現在,視覺部分完美無缺,但是我的ArrayList內部沒有任何變化。我怎樣才能達到我的目標?更改JTree中的節點

這是我的JTree看起來像:

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; 
    } 

這裏是我的ActionListener:

JButton addChildButton = new JButton("Add Child"); 
      addChildButton.addActionListener(new 
      ActionListener() 
      { 
       public void actionPerformed(ActionEvent event) 
       { 
        DefaultMutableTreeNode selectedNode 
         = (DefaultMutableTreeNode) 
         tree.getLastSelectedPathComponent(); 

        if (selectedNode == null) return; 

        DefaultMutableTreeNode newNode 
         = new DefaultMutableTreeNode("New"); 
        model.insertNodeInto(newNode, selectedNode, 
         selectedNode.getChildCount());    

        // now display new node 

        TreeNode[] nodes = model.getPathToRoot(newNode); 
        TreePath path = new TreePath(nodes); 
        tree.scrollPathToVisible(path); 
       } 
      }); 

這裏是我對巫類arralist是基於:

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; 
} 

} 
+0

我認爲你必須尋找適當的通知程序,沒有別的沒有SSCCE/MCVE,簡短,可運行,可編譯爲局部變量模型的硬編碼值,或通過點擊至jtree標籤進行搜索 – mKorbel

回答

1

你加新值僅針對JTree節點,還需要將新值添加到Department/Factory實例。

嘗試下一個示例,其中MyObject是代表TreeNode的類。 「添加」是按鈕,增加了一個新的對象來JTree的,併爲myObject的情況下,「打印」打印到控制檯當前子對象:

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; 
     } 

    } 

}