java的一个简单程序，该程序的功能是输出杨辉三角。-a simple java program, the program' s function is to output Yang Hui triangle.

编写简单的点对点聊天程序。 需要使用GUI实现用户输入和接收聊天内容 -Write a simple point-chat program. Need to use the GUI to achieve user input and receive chat

用两种方法求输入日期的星期数，JAVA，实验-To seek the number of weeks of the number you input

求n（奇数）阶幻方。n阶幻方是n×n的方阵，填入1～n2各数，使得该方阵的各行各列、对角线元素的和都相等。-Find n (odd) order magic square. magic square of order n is the n × n square, fill in the 1 ~ n2 the number, making the square of each row of the column, and diagonal elements are equal.