Bing_sama的博客

·二叉节点 class TreeNode<E> { E element; TreeNode<E> left; TreeNode<E> right; public TreeNode(E e) { element = e; } } ·先序遍历 protected void preorder(TreeNode<E> root) { if (root == null) return

//获取时间加一年或加一月或加一天 Date date = new Date(); Calendar cal = Calendar.getInstance(); cal.setTime(date);//设置起时间 //System.out.println(“111111111::::”+cal.getTime()); cal.add(Calendar.YEAR, 1);//增加一年 //cd.add(Calendar.DATE, n);//增加一天 //cd.add(Calendar.DATE, -10);