我写了一个for循环用以格式化代码并将其建立成树，可是总是显示不出下面的子节点是怎么回事，求高人解答
public class FormattedCode1 {
private static String getCount (int count){
String st = "\n";
if(count<0){
count = 0;
}
for(int i=0;i<count;i++){
st=st+" ";
}
return st;
}
public static String Method_2(String jaq){
int a = 0;
String sr ="" ;
String[] arr = {"1"};
String[] st = jaq.split("<");
String str = "";
List<String> list = Arrays.asList(st);
System.out.println(list.toString());
DefaultMutableTreeNode node[] = new DefaultMutableTreeNode[list.size()];
node[0] = new DefaultMutableTreeNode("Code",true);
JFrame f = new JFrame("HTML.code");
JPanel p;
JTree jTree5 = new JTree(node[0]);
for (int i = 1; i<list.size();i++) {
char c = st[i].charAt(0);
if (((c>='a'&&c<='z')||(c>='A'&&c<='Z'))) {
if (st[i].startsWith("img")||st[i].startsWith("link")||st[i].startsWith("meta")||st[i].startsWith("input")||st[i].startsWith("hr")||st[i].startsWith("br")) {
if(st[i-1].startsWith("img")||st[i-1].startsWith("link")||st[i-1].startsWith("meta")||st[i-1].startsWith("input")||st[i-1].startsWith("hr")||st[i-1].startsWith("br")) {
a = a;//本级为单标签且上一级为单标签，等级为上一级等级
}else if (st[i-1].startsWith("/")) {
a = a;//本级为单标签且上一级为结束标签，等级为上一级等级
}else{
a = a+1;//本级为单标签且上一级不是单标签也不是结束标签，等级为上一级+1
}
}else{
if (st[i-1].startsWith("img")||st[i-1].startsWith("link")||st[i-1].startsWith("meta")||st[i-1].startsWith("input")||st[i-1].startsWith("hr")||st[i-1].startsWith("br")) {
a = a;//本级为开始标签，上一级为单标签，等级为上一级等级；
}else if (st[i-1].startsWith("/")) {
a = a;//本级为开始标签，上一级为结束标签，等级为上一级等级
}else{
//本级为开始标签，上一级为开始标签或为空，等级为上一级等级+1
************node[i] = new DefaultMutableTreeNode(st[i],true);
node[a].add(new DefaultMutableTreeNode(node[i]));
p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.X_AXIS));
p.setPreferredSize(new Dimension(700, 400));
p.add(new JScrollPane(jTree5));
f.setContentPane(p);
f.pack();
f.setLocation(300, 200);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
a = a+1;************
}
}
}
if (st[i].startsWith("/")){
if (st[i-1].startsWith("img")||st[i-1].startsWith("link")||st[i-1].startsWith("meta")||st[i-1].startsWith("input")||st[i-1].startsWith("hr")||st[i-1].startsWith("br")) {
a = a-1; //本级为结束标签且上一级为单标签，等级为上一级等级-1
}else if(st[i-1].startsWith("/")) {
a = a-1;//本级为结束标签且上一级为结束标签，等级为上一级等级-1
}else{
a = a;//本级为结束标签等级为上一级非单标签且非结束标签，等级为上一级等级
}
}
sr = getCount(a)+"<"+st[i];
str+=(String)sr;
}
System.out.println(str);
return str;
}
public static void main(String[] args) {
String jaq = "<html><button><option><html></div><div><div><img><img></div></div></html></html></html></html>";
FormattedCode.Method_2(jaq);
}
}
