如果大家想自己制作通信达接口，当然可以自行在网上找通信达源码，而且网上也有很多，下面小编就可以直接给大家一套用java语言写的源码了。

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.GridLayout;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.GregorianCalendar;

import java.util.Scanner;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.border.Border;

     public class Test {

public static void main(String[] srg) {

System.out.println("请输入:yyyy-MM-dd");//

Calendar c = new GregorianCalendar();

Scanner s = new Scanner(System.in);

String str =s.nextLine();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

try {

Date d1 =sdf.parse(str);

c.setTime(d1);

int days = c.get(Calendar.DAY_OF_MONTH);

int day = c.getActualMaximum(Calendar.DAY_OF_MONTH);

   c.set(Calendar.DATE,1);

   int  daynum  =c.get(Calendar.DAY_OF_WEEK);

   int  daynums = daynum ==1?6:(daynum-2);

   c.set(Calendar.DATE, day);

   int dayss = c.get(Calendar.DAY_OF_WEEK);