填充一個JTree

Question

我有包含 我有好幾個問題，B類的對象數組A類對象的數組：（代碼示例將有很大的幫助）

1. 如何使用JTree父節點作爲對象A和子節點作爲B並填充它？
2. 假設整個JFrame分爲兩個面板（一個面板包含JTree和另一個JPanel，顯示對象的屬性對應於在JTree上選擇的選項），我該如何做到這一點？截至目前，我可以將這些值硬編碼到JTree。

我在網上搜索了一個很多的例子，但只能找到基本的例子。

這是我迄今所做的：

public class A { 
int a1=10; 
int a2=20; 
B bobj[]=new B[2]; 
A(){ 
    bobj[0]=new B(); 
    bobj[1]=new B(); 
} 
} 

class B { 
int b=30; 
} 

在我的JTree代碼：

import javax.swing.tree.TreeModel; 

public class try1 extends javax.swing.JFrame { 
static A a2=new A(); 
/** Creates new form try1 */ 
public try1() { 
    initComponents(); 
} 

/** This method is called from within the constructor to 
* initialize the form. 
* WARNING: Do NOT modify this code. The content of this method is 
* always regenerated by the Form Editor. 
*/ 
@SuppressWarnings("unchecked") 
// <editor-fold defaultstate="collapsed" desc="Generated Code"> 
private void initComponents() { 

    jScrollPane1 = new javax.swing.JScrollPane(); 
    Tree = new javax.swing.JTree(); 
    jPanel1 = new javax.swing.JPanel(); 
    jPanel2 = new javax.swing.JPanel(); 

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

    Tree.setModel(a2); 
    Tree.setAutoscrolls(true); 
    Tree.setRootVisible(true); 
    jScrollPane1.setViewportView(Tree); 
    Tree.getAccessibleContext().setAccessibleName(""); 
    Tree.getAccessibleContext().setAccessibleDescription(""); 

    jPanel1.setBackground(new java.awt.Color(254, 254, 254)); 

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
    jPanel1.setLayout(jPanel1Layout); 
    jPanel1Layout.setHorizontalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 655, Short.MAX_VALUE) 
    ); 
    jPanel1Layout.setVerticalGroup(
     jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 569, Short.MAX_VALUE) 
    ); 

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2); 
    jPanel2.setLayout(jPanel2Layout); 
    jPanel2Layout.setHorizontalGroup(
     jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 463, Short.MAX_VALUE) 
    ); 
    jPanel2Layout.setVerticalGroup(
     jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGap(0, 151, Short.MAX_VALUE) 
    ); 

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
    getContentPane().setLayout(layout); 
    layout.setHorizontalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
      .addContainerGap() 
      .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 236, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
      .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
      .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addGap(21, 21, 21)) 
    ); 
    layout.setVerticalGroup(
     layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
     .addGroup(layout.createSequentialGroup() 
      .addContainerGap() 
      .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
      .addContainerGap(473, Short.MAX_VALUE)) 
     .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
      .addContainerGap(43, Short.MAX_VALUE) 
      .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) 
       .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 569, Short.MAX_VALUE)) 
      .addContainerGap(24, Short.MAX_VALUE)) 
    ); 

    pack(); 
}// </editor-fold> 

/** 
* @param args the command line arguments 
*/ 
public static void main(String args[]) { 
    a2=new A(); 
    java.awt.EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      new try1().setVisible(true); 
     } 
    }); 
} 

// Variables declaration - do not modify 
public javax.swing.JTree Tree; 
private javax.swing.JPanel jPanel1; 
private javax.swing.JPanel jPanel2; 
private javax.swing.JScrollPane jScrollPane1; 
// End of variables declaration 

} 

我發現這個例子here 1.自例如最初的格式是一個數組字符串，他們正在使用hastable。由於我使用的是包含B對象的對象類（A），我該如何做（我在上面得到一個錯誤）。 2.我附上了我的相框的佈局。我在屏幕截圖中對Jtree進行了硬編碼。我該怎麼做，以便如果我點擊任何Jtree節點，我可以查看J 附近的TextField上的詳細信息？

Answer 1

根據您的程序片段和圖像，您可能需要先研究How to Use Trees中討論的TreeDemo示例。相關例子可以在here找到。