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我想寫一個實現TreeModel類的類。我希望有人能指引我朝着正確的方向前進。以下是我的課程。問題是當我將它綁定到一個jTree組件時，第二個級別不斷被添加。所以我懷疑我的參考父對象是錯誤的：實現TreeModel
public class PMEntry implements TreeModel{
private String title;
private List<PMEntry> pmEntryCollection;
private String pmId;
private String href;
private PMEntry root;
private ModuleType type;
public PMEntry (PMEntry root){
this.root = root;
}
@Override
public Object getRoot() {
return ((PMEntry)this.root);
}
@Override
public Object getChild(Object o, int i) {
if(getPmEntryCollection().isEmpty()){
return null;
}else {
return (PMEntry) getPmEntryCollection().get(i);
}
}
@Override
public int getChildCount(Object o) {
if(getPmEntryCollection().isEmpty()){
return 0;
}else {
return getPmEntryCollection().size();
}
}
@Override
public boolean isLeaf(Object o) {
PMEntry pmentry = (PMEntry)o;
return (pmentry.getType() == ModuleType.DM) ? true : false;
}
@Override
public void valueForPathChanged(TreePath tp, Object o) {
//todo
}
@Override
public int getIndexOfChild(Object parent, Object child) {
if (!(parent instanceof PMEntry)){
System.out.println("Returning -1");
return -1;
}
PMEntry pParent = (PMEntry) parent;
List<PMEntry> children = pParent.getPmEntryCollection();
if (children == null) {
System.out.println("children = null, Returning -1");
return -1;
}
for (int i = 0; i < children.size(); i++) {
System.out.println("Child:" + child);
if (children.get(i) == child) {
return i;
}
}
return -1;
}
@Override
public void addTreeModelListener(TreeModelListener tl) {
//todo
}
@Override
public void removeTreeModelListener(TreeModelListener tl) {
//todo
}
@Override
public String toString(){
return this.getTitle();
}
public enum ModuleType {
PM,
DM
}
// getters and setters here....
而這就是我如何結合數據
片段PMEntry tm = new PMEntry(null);
tm.setTitle("Root");
PMEntry pmRoot = new PMEntry((PMEntry)(tm));
pmRoot.setTitle("Project");
PMEntry pm1 = new PMEntry(pmRoot);
pm1.setType(PMEntry.ModuleType.DM);
pm1.setTitle("Publication Module");
PMEntry pm2 = new PMEntry(pmRoot);
pm2.setType(PMEntry.ModuleType.PM);
pm2.setTitle("Chapter");
List<PMEntry> pmCollection = new ArrayList<PMEntry>();
List<PMEntry> pmCollection1 = new ArrayList<PMEntry>();
PMEntry pm3 = new PMEntry(null);
pm3.setType(PMEntry.ModuleType.DM);
pm3.setTitle("Data Module");
PMEntry pm4 = new PMEntry(null);
pm4.setType(PMEntry.ModuleType.DM);
pm4.setTitle("Data Module");
pmCollection1.add(pm3);
pmCollection1.add(pm4);
pm2.setPmEntryCollection(pmCollection1);
pmCollection.add(pm1);
pmCollection.add(pm2);
pmRoot.setPmEntryCollection(pmCollection);
this.jTree1.setModel(pmRoot);
嗨，我想保存我的對象。我發佈的示例是一個較大對象的虛擬版本，它希望能夠創建，綁定和編輯它。 – PhillyNJ 2012-07-22 00:44:38
不是你應該考慮的答案：你的對象與DefaultTreeModel有什麼不同？您可以創建，編輯和綁定它。 – duffymo 2012-07-22 00:48:31
嗨，我不只是想顯示一個節點或一個葉節點，我想代表我的對象的TreeModel和其對對象的引用。 – PhillyNJ 2012-07-22 00:56:11