我正在尝试练习制作二叉树,以便我可以对它们进行不同的操作。
import java.util.*;
import java.lang.*;
public class Main {
public static void main(String[] args) {
}
}
//Building Binary Trees
class bTree {
static class Node { //remember to initilize a root
String value;
Node left, right;
Node(String value, Node left, Node right) {
this.value = value;
this.left = left;
this.right = right;
}
Node(String value) //THIS IS A SIBLING CONSTRUCTOR
{
this(value, null, null);
}
Node root = new Node("ROOT");
Node lefty = new Node("LEFT0");
Node righty = new Node("RIGHT0");
root.left = lefty;
root.right = righty;
}
Node root = null;
}
我为什么会收到错误信息:“在 root.left 和 root.right 赋值处需要标识符”?
谢谢!