JTree-无法转换为javax.swing.tree.MutableTreeNode
我对javagui制作非常陌生,正在尝试在这里进行尝试。基本上,我有另一个类,它从excel表格中读取关于自动测试包的数据。我想做的是将这些测试添加到这个资源树中。但是当我尝试使用JTree-无法转换为javax.swing.tree.MutableTreeNode,java,swing,awt,jtree,Java,Swing,Awt,Jtree,我对javagui制作非常陌生,正在尝试在这里进行尝试。基本上,我有另一个类,它从excel表格中读取关于自动测试包的数据。我想做的是将这些测试添加到这个资源树中。但是当我尝试使用 addTest(new testInfo ("TESTING", "TESTING MESSAGE")); 它似乎在抱怨。我的代码: package com.main; import java.awt.Dimension; import java.awt.GridLa
addTest(new testInfo
("TESTING",
"TESTING MESSAGE"));
它似乎在抱怨。我的代码:
package com.main;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreeSelectionModel;
public class ExcelReaderGui extends JPanel
implements TreeSelectionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
private JEditorPane htmlPane;
private JTree tree;
private URL helpURL;
private static boolean DEBUG = false;
private static ReadExcel re = new ReadExcel();
private List<testInfo> testsToAdd = new ArrayList<testInfo>();;
//Optionally play with line styles. Possible values are
//"Angled" (the default), "Horizontal", and "None".
private static boolean playWithLineStyle = false;
private static String lineStyle = "Horizontal";
//Optionally set the look and feel.
private static boolean useSystemLookAndFeel = false;
public ExcelReaderGui() {
super(new GridLayout(1,0));
//Create the nodes.
addTest(new testInfo
("TESTING",
"TESTING MESSAGE"));
DefaultMutableTreeNode top =
new DefaultMutableTreeNode("Automated tests");
createNodes(top);
//Create a tree that allows one selection at a time.
tree = new JTree(top);
tree.getSelectionModel().setSelectionMode
(TreeSelectionModel.SINGLE_TREE_SELECTION);
//Listen for when the selection changes.
tree.addTreeSelectionListener(this);
if (playWithLineStyle) {
System.out.println("line style = " + lineStyle);
tree.putClientProperty("JTree.lineStyle", lineStyle);
}
//Create the scroll pane and add the tree to it.
JScrollPane treeView = new JScrollPane(tree);
//Create the HTML viewing pane.
htmlPane = new JEditorPane();
htmlPane.setEditable(false);
initHelp();
JScrollPane htmlView = new JScrollPane(htmlPane);
//Add the scroll panes to a split pane.
JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
splitPane.setTopComponent(treeView);
splitPane.setBottomComponent(htmlView);
Dimension minimumSize = new Dimension(100, 50);
htmlView.setMinimumSize(minimumSize);
treeView.setMinimumSize(minimumSize);
splitPane.setDividerLocation(150);
splitPane.setPreferredSize(new Dimension(700, 400));
//Add the split pane to this panel.
add(splitPane);
}
/** Required by TreeSelectionListener interface. */
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode)
tree.getLastSelectedPathComponent();
if (node == null) return;
Object nodeInfo = node.getUserObject();
if (node.isLeaf()) {
testInfo book = (testInfo)nodeInfo;
displayURL(book.resultOfTest);
if (DEBUG) {
System.out.print(book.resultOfTest + ": \n ");
}
} else {
displayURL("Drill down in the resource trees above to find tests with their results");
}
if (DEBUG) {
System.out.println(nodeInfo.toString());
}
}
private class testInfo {
public String testName;
public String resultOfTest;
public testInfo(String test, String testResult) {
testName = test;
resultOfTest = testResult;
}
public String toString() {
return testName;
}
}
private void initHelp() {
String s = "TreeDemoHelp.html";
helpURL = getClass().getResource(s);
if (helpURL == null) {
System.err.println("Couldn't open help file: " + s);
} else if (DEBUG) {
System.out.println("Help URL is " + helpURL);
}
displayURL("Drill down in the resource trees above to find tests with their results");
}
private void displayURL(String url) {
htmlPane.setText(url);
}
public void addTest(testInfo testToAdd) {
testsToAdd.add(testToAdd);
}
private void createNodes(DefaultMutableTreeNode top) {
DefaultMutableTreeNode category = null;
DefaultMutableTreeNode test = null;
category = new DefaultMutableTreeNode("14 February 2014");
top.add(category);
for (testInfo newTest : testsToAdd) {
category.add((MutableTreeNode) newTest);
}
category = new DefaultMutableTreeNode("13 february 2014");
top.add(category);
//TODO Tests for previous dates
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event dispatch thread.
*/
private static void createAndShowGUI() {
if (useSystemLookAndFeel) {
try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
System.err.println("Couldn't use system look and feel.");
}
}
//Create and set up the window.
JFrame frame = new JFrame("My Excel Reader");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add content to the window.
frame.add(new ExcelReaderGui());
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
re.setInputFile("D:\\Users\\liagordo\\java\\RMG\\dashboard.xls");
re.read();
} catch (IOException e) {
System.out.println("Error reading excel file");
e.printStackTrace();
}
createAndShowGUI();
}
});
}
}
package.com.main;
导入java.awt.Dimension;
导入java.awt.GridLayout;
导入java.io.IOException;
导入java.net.URL;
导入java.util.ArrayList;
导入java.util.List;
导入javax.swing.JEditorPane;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.JScrollPane;
导入javax.swing.JSplitPane;
导入javax.swing.JTree;
导入javax.swing.UIManager;
导入javax.swing.event.TreeSelectionEvent;
导入javax.swing.event.TreeSelectionListener;
导入javax.swing.tree.DefaultMutableTreeNode;
导入javax.swing.tree.MutableTreeNode;
导入javax.swing.tree.TreeSelectionModel;
公共类ExcelReaderGui扩展了JPanel
实现TreeSelectionListener{
/**
*
*/
私有静态最终长serialVersionUID=1L;
私人绝地武士团;
私有JTree树;
私有URL帮助URL;
私有静态布尔调试=false;
私有静态ReadExcel re=new ReadExcel();
私有列表testsToAdd=newarraylist();;
//可以选择使用线条样式。可能的值为
//“有角度”(默认值)、“水平”和“无”。
私有静态布尔playWithLineStyle=false;
私有静态字符串lineStyle=“水平”;
//可以选择设置外观。
私有静态布尔useSystemLookAndFeel=false;
公共ExcelReaderGui(){
超级(新网格布局(1,0));
//创建节点。
addTest(新测试信息)
(“测试”,
“测试信息”);
DefaultMutableTreeNode顶部=
新的DefaultMutableTreeNode(“自动测试”);
createNodes(顶部);
//创建一个允许一次选择一个选项的树。
树=新的JTree(顶部);
tree.getSelectionModel().setSelectionMode
(树选择模型。单树选择);
//当选择更改时,请侦听。
addTreeSelectionListener(这个);
如果(播放WithLineStyle){
System.out.println(“line style=“+line style”);
tree.putClientProperty(“JTree.lineStyle”,lineStyle);
}
//创建滚动窗格并将树添加到其中。
JScrollPane treeView=新的JScrollPane(树);
//创建HTML查看窗格。
htmlPane=新的JEditorPane();
htmlPane.setEditable(false);
initHelp();
JScrollPane htmlView=新的JScrollPane(htmlPane);
//将滚动窗格添加到拆分窗格。
JSplitPane splitPane=新的JSplitPane(JSplitPane.VERTICAL_SPLIT);
splitPane.setTopComponent(treeView);
splitPane.setBottomComponent(htmlView);
尺寸最小尺寸=新尺寸(100,50);
htmlView.setMinimumSize(最小尺寸);
treeView.setMinimumSize(minimumSize);
splitPane.setDividerLocation(150);
splitPane.setPreferredSize(新维度(700400));
//将拆分窗格添加到此面板。
添加(拆分窗格);
}
/**TreeSelectionListener接口所需*/
公共作废值已更改(TreeSelection事件e){
DefaultMutableTreeNode=(DefaultMutableTreeNode)
getLastSelectedPathComponent();
if(node==null)返回;
Object nodeInfo=node.getUserObject();
if(node.isLeaf()){
testInfo book=(testInfo)nodeInfo;
显示URL(book.resultOfTest);
如果(调试){
System.out.print(book.resultOfTest+“:\n”);
}
}否则{
displayURL(“在上面的资源树中向下钻取以查找带有结果的测试”);
}
如果(调试){
System.out.println(nodeInfo.toString());
}
}
私有类测试信息{
公共字符串testName;
公共字符串结果测试;
公共testInfo(字符串测试、字符串测试结果){
testName=test;
resultOfTest=测试结果;
}
公共字符串toString(){
返回testName;
}
}
私有void initHelp(){
字符串s=“TreeDemoHelp.html”;
helpURL=getClass().getResource;
if(helpURL==null){
System.err.println(“无法打开帮助文件:+s”);
}else if(调试){
System.out.println(“帮助URL为”+helpURL);
}
displayURL(“在上面的资源树中向下钻取以查找带有结果的测试”);
}
私有void显示url(字符串url){
htmlPane.setText(url);
}
公共void addTest(testInfo testToAdd){
testsToAdd.add(testToAdd);
}
私有void createNodes(DefaultMutableTreeNode顶部){
DefaultMutableTreeNode类别=空;
DefaultMutableTreeNode测试=null;
类别=新的DefaultMutableTreeNode(“2014年2月14日”);
添加(类别);
for(testInfo newTest:testsToAdd){
添加((可变树节点)新测试);
}
类别=新的DefaultMutableTreeNode(“2014年2月13日”);
添加(类别);
//以前日期的TODO测试
}
/**
*创建GUI并显示它。为了线程安全,
*应该从
*事件调度线程。
*/
私有静态void createAndShowGUI(){
如果(使用SystemLookandFeel){
试一试{
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}捕获(例外e){
System.err.println(“无法使用系统外观”);
}
}
//创建并设置窗口。
JFrame=newjframe(“我的Excel阅读器”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//向窗口添加内容。
frame.add(新的ExcelReaderGui());
//显示窗口。
frame.pack();
frame.setVisible(true);
}
公共静态void main(字符串[]args){
//为事件分派线程计划作业:
//创建并显示此应用程序的GUI。
javax.swing.SwingUtilities.invokeLater(新的Runnable(){
公开募捐{
试一试{
关于setInputFile(“D:\\Users\\l
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException:
com.main.ExcelReaderGui$testInfo cannot be cast to javax.swing.tree.MutableTreeNode
at com.main.ExcelReaderGui.createNodes(ExcelReaderGui.java:157)
at com.main.ExcelReaderGui.<init>(ExcelReaderGui.java:53)
at com.main.ExcelReaderGui.createAndShowGUI(ExcelReaderGui.java:186)
at com.main.ExcelReaderGui.access$1(ExcelReaderGui.java:171)
at com.main.ExcelReaderGui$1.run(ExcelReaderGui.java:205)
for (testInfo newTest : testsToAdd) {
category.add((MutableTreeNode) newTest);
}
for (testInfo newTest : testsToAdd) {
test = new DefaultMutableTreeNode(newTest);
category.add(test);
}
category.add((MutableTreeNode) newTest);