applet2.java~15~

在JAVA的APPLE中直方图的如何处理.

package zhifang;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeSelectionModel;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
//Applet2
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import java.awt.*;
//import java.awt.event.*;
public class Applet2 extends JApplet {
JTree tree = new JTree();
DefaultTreeModel model = (DefaultTreeModel)tree.getModel();
TreeSelectionModel selectionModel = tree.getSelectionModel();

public void init() {
getContentPane().add(tree, BorderLayout.CENTER);

tree.addTreeSelectionListener(
new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e) {
TreePath path = e.getNewLeadSelectionPath();

if(path == null)
System.out.println("Selection Cleared");
else {
TreePath parentPath = path.getParentPath();
Object
lastNode = path.getLastPathComponent(),
firstNode= path.getPathComponent(0);

System.out.println("Path: " + path +
" has " +
path.getPathCount() +
" nodes");
System.out.println("Last Path Component: " +
lastNode.toString());
System.out.println("First Path Component: " +
firstNode.toString());
System.out.println("Parent Path: " +
parentPath);

// the following if statement is always true

if(parentPath.isDescendant(path)) {
System.out.println(parentPath +
" is a descendant of " + path);

}
DefaultMutableTreeNode last =
(DefaultMutableTreeNode)lastNode;
DefaultMutableTreeNode first =
(DefaultMutableTreeNode)lastNode;

if(first.isNodeDescendant(last)) {
System.out.println(
"last is descendant of first");

}
System.out.println("");
}

}
});
}
}



/*
 public class
    extends JApplet {
  boolean isStandalone = false;
  JPanel jPanel1 = new JPanel();
  JSplitPane jSplitPane1 = new JSplitPane();
  JTree jTree1 = new JTree();
  DefaultMutableTreeNode root;
  DefaultMutableTreeNode temNode;
  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
        (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public Applet2() {
  }

  //Initialize the applet
  public void init() {
    try {
      jbInit();
 root = new DefaultMutableTreeNode("wangjydfkljfdljkdfjldfkldfjkljkldfjkldfjkl");
      temNode=new DefaultMutableTreeNode("wangjydfkljfdljkdfjldfkldfjkljkldfjkldfjkl is son");
      root.add(temNode);
      DefaultMutableTreeNode tem=new DefaultMutableTreeNode("sonson");
      for(int i=0;i<5;i++){
        temNode.add(tem);
      }

      jTree1 = new JTree(root);
      jTree1.getSelectionModel().setSelectionMode(TreeSelectionModel.
    SINGLE_TREE_SELECTION);

//为叶子增加图片
//this.SetLeafPicture();

    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  //Component initialization
  private void jbInit() throws Exception {
    this.setSize(new Dimension(400, 300));
    this.getContentPane().setLayout(null);
    jPanel1.setBounds(new Rectangle(4, 0, 393, 297));
    jPanel1.setLayout(null);
    jSplitPane1.setOrientation(JSplitPane.VERTICAL_SPLIT);//垂直切份
    this.getContentPane().add(jPanel1);
    jPanel1.add(jSplitPane1);
    jSplitPane1.add(jTree1, JSplitPane.BOTTOM);
    jSplitPane1.setBounds(new Rectangle(21, 0, 384, 289));
    jSplitPane1.setDividerLocation(100);
    jTree1.setEnabled(true);
        jTree1.setAutoscrolls(true);
        jTree1.setBorder(BorderFactory.createLineBorder(Color.black));
        jTree1.setRequestFocusEnabled(true);
        jTree1.setCellEditor(null);
        jTree1.setEditable(false);
        jTree1.setExpandsSelectedPaths(true);
        jTree1.setRootVisible(true);
  }

  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }

  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }

  //static initializer for setting look & feel
  static {
    try {
      //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      //UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
    }
    catch (Exception e) {
    }
  }
 }
 class Branch
 {
  DefaultMutableTreeNode r; //树的数据结构中通用节点,节点可有多个子节点。
  public Branch(String[] data)
  {
   r = new DefaultMutableTreeNode(data[0]);
   for(int i=0;i<data.length;i++){
    //给节点r添多个子节点
    r.add(new DefaultMutableTreeNode(data[i]));
   }
  }
  public DefaultMutableTreeNode node()
  {
   return r; //返回节点
  }
 }*/