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java案例500行代码的简单介绍

IT技术java

需要一个java程序，最好是万年历的，要在500行左右的Java-时钟万年历
clock.java代码如下：
/**
* Clock.java
* Summary 数字时间显示
* Created on 2005-8-14
* @author 高?
* remark 如有改动请发一份代码给java案例500行代码我 ， 邮箱gkgklovelove@eyou.com
*/
package Clock;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
class Clock extends Canvas implements Runnable{
MainFrame mf;
Thread t;
String time;
Clock(MainFrame mf){
this.mf=mf;
setSize(400,40);
setBackground(Color.white);
t=new Thread(this);//实例化线程
t.start();//调用线程
}
public void run(){
while(true){
try{
t.sleep(1000);//休眠1秒钟
}catch(InterruptedException e){
System.out.println("异常");
}
this.repaint(100);
}
}
public void paint(Graphics g){
Font f=new Font("宋体",Font.BOLD,16);
SimpleDateFormat SDF=new SimpleDateFormat("yyyy'年'MM'月'dd'日'HH:mm:ss");//格式化时间显示类型
Calendar now=Calendar.getInstance();
time=SDF.format(now.getTime());//得到当前日期和时间
g.setFont(f);
g.setColor(Color.orange);
g.drawString(time,100,25);
}
MainFrame．java 的代码如下：
/**
* MainFrame.java
* Summary 万年历主类
* Created on 2005-8-14
* @author 高?
* remark 如有改动请发一份代码给java案例500行代码我，邮箱gkgklovelove@eyou.com
*/
package Clock;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
class MainFrame extends JFrame{
JPanel panel=new JPanel(new BorderLayout());
JPanel panel1=new JPanel();
JPanel panel2=new JPanel(new GridLayout(7,7));
JPanel panel3=new JPanel();
JLabel []label=new JLabel[49];
JLabel y_label=new JLabel("年份");
JLabel m_label=new JLabel("月份");
JComboBox com1=new JComboBox();
JComboBox com2=new JComboBox();
JButton button=new JButton("查看");
int re_year,re_month;
int x_size,y_size;
String year_num;
Calendar now=Calendar.getInstance();//实例化Calendar
MainFrame(){
super("万年历");
setSize(300,350);
x_size=(int)(Toolkit.getDefaultToolkit().getScreenSize().getWidth());
y_size=(int)(Toolkit.getDefaultToolkit().getScreenSize().getHeight());
setLocation((x_size-300)/2,(y_size-350)/2);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel1.add(y_label);
panel1.add(com1);
panel1.add(m_label);
panel1.add(com2);
panel1.add(button);
for(int i=0;i49;i){
label[i]=new JLabel("",JLabel.CENTER);//将显示的字符设置为居中
panel2.add(label[i]);
}
panel3.add(new Clock(this));
panel.add(panel1,BorderLayout.NORTH);
panel.add(panel2,BorderLayout.CENTER);
panel.add(panel3,BorderLayout.SOUTH);
panel.setBackground(Color.white);
panel1.setBackground(Color.white);
panel2.setBackground(Color.white);
panel3.setBackground(Color.white);
Init();
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int c_year,c_month,c_week;
c_year=Integer.parseInt(com1.getSelectedItem().toString());//得到当前所选年份
c_month=Integer.parseInt(com2.getSelectedItem().toString())-1;//得到当前月份，并减1,计算机中的月为0－11
c_week=use(c_year,c_month);//调用函数use，得到星期几
Resetday(c_week,c_year,c_month);//调用函数Resetday
}});
setContentPane(panel);
setVisible(true);
setResizable(false);
}
public void Init(){
int year,month_num,first_day_num;
String log[]={"日","一","二","三","四","五","六"};
for(int i=0;i7;i){
label[i].setText(log[i]);
}
for(int i=0;i49;i=i 7){
label[i].setForeground(Color.red);//将星期日的日期设置为红色
}
for(int i=6;i49;i=i 7){
label[i].setForeground(Color.green);//将星期六的日期设置为绿色
}
for(int i=1;i10000;i){
com1.addItem("" i);
}
for(int i=1;i13;i){
com2.addItem("" i);
}
month_num=(int)(now.get(Calendar.MONTH));//得到当前时间的月份
year=(int)(now.get(Calendar.YEAR));//得到当前时间的年份
com1.setSelectedIndex(year-1);//设置下拉列表显示为当前年
com2.setSelectedIndex(month_num);//设置下拉列表显示为当前月
first_day_num=use(year,month_num);
Resetday(first_day_num,year,month_num);
}
public int use(int reyear,int remonth){
int week_num;
now.set(reyear,remonth,1);//设置时间为所要查询的年月的第一天
week_num= (int)(now.get(Calendar.DAY_OF_WEEK));//得到第一天的星期
return week_num;
}
public void Resetday(int week_log,int year_log,int month_log){
int month_score_log;//判断是否是闰年的标记
int month_day_score;//存储月份的天数
int count;
month_score_log=0;
month_day_score=0;
count=1;
if(year_log%4==0year_log0!=0||year_log@0==0){//判断是否为闰年
month_score_log=1;
}
month_log=month_log 1;//将传来的月份数加1
switch(month_log){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
month_day_score=31;
break;
case 4:
case 6:
case 9:
case 11:
month_day_score=30;
break;
case 2:
if(month_score_log==1){
month_day_score=29;
}
else{
month_day_score=28;
}
break;
}
for(int i=7;i49;i){//初始化标签
label[i].setText("");
}
week_log=week_log 6;//将星期数加6，使显示正确
month_day_score=month_day_score week_log;
for(int i=week_log;imonth_day_score;i,count){
label[i].setText(count "");
}
}
public static void main(String [] args){
JFrame.setDefaultLookAndFeelDecorated(true);
MainFrame start=new MainFrame();
}
}
求java小程序代码 ， 500行左右 。。大作业用 。追加50import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class mypanel extends Panel implements MouseListener
{
int chess[][] = new int[11][11];
boolean Is_Black_True;
mypanel()
{
Is_Black_True = true;
for(int i = 0;i11;i)
{
for(int j = 0;j11;j)
{
chess[i][j] = 0;
}
}
addMouseListener(this);
setBackground(Color.BLUE);
setBounds(0, 0, 360, 360);
setVisible(true);
}
public void mousePressed(MouseEvent e)
{
int x = e.getX();
int y = e.getY();
if(x25 || x33025 ||y25 || y330 25)
{
return;
}
if(chess[x/30-1][y/30-1] != 0)
{
return;
}
if(Is_Black_True == true)
{
chess[x/30-1][y/30-1] = 1;
Is_Black_True = false;
repaint();
Justisewiner();
return;
}
if(Is_Black_True == false)
{
chess[x/30-1][y/30-1] = 2;
Is_Black_True = true;
repaint();
Justisewiner();
return;
}
}
void Drawline(Graphics g)
{
for(int i = 30;i = 330;i= 30)
{
for(int j = 30;j = 330; j = 30)
{
g.setColor(Color.WHITE);
g.drawLine(i, j, i, 330);
}
}
for(int j = 30;j = 330;j= 30)
{
g.setColor(Color.WHITE);
g.drawLine(30, j, 330, j);
}
}
void Drawchess(Graphics g)
{
for(int i = 0;i11;i)
{
for(int j = 0;j11;j)
{
if(chess[i][j] == 1)
{
g.setColor(Color.BLACK);
g.fillOval((i1) * 30 - 8, (j1) * 30 - 8, 16, 16);
}
if(chess[i][j] == 2)
{
g.setColor(Color.WHITE);
g.fillOval((i1) * 30 - 8, (j1) * 30 - 8, 16, 16);
}
}
}
}
void Justisewiner()
{
int black_count = 0;
int white_count = 0;
int i = 0;
for(i = 0;i11;i)//横向判断
{
for(int j = 0;j11;j)
{
if(chess[i][j] == 1)
{
black_count;
if(black_count == 5)
{
JOptionPane.showMessageDialog(this, "黑棋胜利");
Clear_Chess();
return;
}
}
else
{
black_count = 0;
}
if(chess[i][j] == 2)
{
white_count;
if(white_count == 5)
{
JOptionPane.showMessageDialog(this, "白棋胜利");
Clear_Chess();
return;
}
}
else
{
white_count = 0;
}
}
}
for(i = 0;i11;i)//竖向判断
{
for(int j = 0;j11;j)
{
if(chess[j][i] == 1)
{
black_count;
if(black_count == 5)
{
JOptionPane.showMessageDialog(this, "黑棋胜利");
Clear_Chess();
return;
}
}
else
{
black_count = 0;
}
if(chess[j][i] == 2)
{
white_count;
if(white_count == 5)
{
JOptionPane.showMessageDialog(this, "白棋胜利");
Clear_Chess();
return;
}
}
else
{
white_count = 0;
}
}
}
for(i = 0;i7;i)//左向右斜判断
{
for(int j = 0;j7;j)
{
for(int k = 0;k5;k)
{
if(chess[ik][jk] == 1)
{
black_count;
if(black_count == 5)
{
JOptionPane.showMessageDialog(this, "黑棋胜利");
Clear_Chess();
return;
}
}
else
{
black_count = 0;
}
if(chess[ik][jk] == 2)
{
white_count;
if(white_count == 5)
{
JOptionPane.showMessageDialog(this, "白棋胜利");
Clear_Chess();
return;
}
}
else
{
white_count = 0;
}
}
}
}
for(i = 4;i11;i)//右向左斜判断
{
for(int j = 6;j = 0;j--)
{
for(int k = 0;k5;k)
{
if(chess[i - k][jk] == 1)
{
black_count;
if(black_count == 5)
{
JOptionPane.showMessageDialog(this, "黑棋胜利");
Clear_Chess();
return;
}
}
else
{
black_count = 0;
}
if(chess[i - k][jk] == 2)
{
white_count;
if(white_count == 5)
{
JOptionPane.showMessageDialog(this, "白棋胜利");
Clear_Chess();
return;
}
}
else
{
white_count = 0;
}
}
}
}
}
void Clear_Chess()
{
for(int i=0;i11;i)
{
for(int j=0;j11;j)
{
chess[i][j]=0;
}
}
repaint();
}
public void paint(Graphics g)
{
Drawline(g);
Drawchess(g);
}
public void mouseExited(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
}
class myframe extends Frame implements WindowListener
{
mypanel panel;
myframe()
{
setLayout(null);
panel = new mypanel();
add(panel);
panel.setBounds(0,23, 360, 360);
setTitle("单人版五子棋");
setBounds(200, 200, 360, 383);
setVisible(true);
addWindowListener(this);
}
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
public void windowDeactivated(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowOpened(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
}
public class mywindow
{
public static void main(String argc [])
{
myframe f = new myframe();
}
}
需要一份500行的java程序，期末大作业，最好带详细注释 。Java生成CSV文件简单操作实例
CSV是逗号分隔文件(Comma Separated Values)java案例500行代码的首字母英文缩写java案例500行代码，是一种用来存储数据的纯文本格式，通常用于电子表格或数据库软件 。在 CSV文件中 ， 数据“栏”以逗号分隔 ， 可允许程序通过读取文件为数据重新创建正确的栏结构，并在每次遇到逗号时开始新的一栏 。如java案例500行代码：
1231,张三,男2,李四,男3,小红,女
Java生成CSV文件（创建与导出封装类）
package com.yph.omp.common.util;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.beanutils.BeanUtils;
import org.junit.Test;
/**
* Java生成CSV文件
*/
public class CSVUtil {
/**
* 生成为CVS文件
*
* @param exportData
*源数据List
* @param map
*csv文件的列表头map
* @param outPutPath
*文件路径
* @param fileName
*文件名称
* @return
*/
@SuppressWarnings("rawtypes")
public static File createCSVFile(List exportData, LinkedHashMap map,
String outPutPath, String fileName) {
File csvFile = null;
BufferedWriter csvFileOutputStream = null;
try {
File file = new File(outPutPath);
if (!file.exists()) {
file.mkdir();
}
// 定义文件名格式并创建
csvFile = File.createTempFile(fileName, ".csv",
new File(outPutPath));
// UTF-8使正确读取分隔符","
csvFileOutputStream = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(csvFile), "GBK"), 1024);
// 写入文件头部
for (Iterator propertyIterator = map.entrySet().iterator(); propertyIterator
.hasNext();) {
java.util.Map.Entry propertyEntry = (java.util.Map.Entry) propertyIterator
.next();
csvFileOutputStream
.write("\""(String) propertyEntry.getValue() != null ? (String) propertyEntry
.getValue() : """\"");
if (propertyIterator.hasNext()) {
csvFileOutputStream.write(",");
}
}
csvFileOutputStream.newLine();
// 写入文件内容
for (Iterator iterator = exportData.iterator(); iterator.hasNext();) {
Object row = (Object) iterator.next();
for (Iterator propertyIterator = map.entrySet().iterator(); propertyIterator
.hasNext();) {
java.util.Map.Entry propertyEntry = (java.util.Map.Entry) propertyIterator
.next();
/*-------------------------------*/
//以下部分根据不同业务做出相应的更改
StringBuilder sbContext = new StringBuilder("");
if (null != BeanUtils.getProperty(row,(String) propertyEntry.getKey())) {
if("证件号码".equals(propertyEntry.getValue())){
//避免：身份证号码 ，读取时变换为科学记数 - 解决办法：加 \t(用Excel打开时 ， 证件号码超过15位后会自动默认科学记数)
sbContext.append(BeanUtils.getProperty(row,(String) propertyEntry.getKey())"\t");
}else{
sbContext.append(BeanUtils.getProperty(row,(String) propertyEntry.getKey()));
}
}
csvFileOutputStream.write(sbContext.toString());
/*-------------------------------*/
if (propertyIterator.hasNext()) {
csvFileOutputStream.write(",");
}
}
if (iterator.hasNext()) {
csvFileOutputStream.newLine();
}
}
csvFileOutputStream.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
csvFileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return csvFile;
}
/**
* 下载文件
*
* @param response
* @param csvFilePath
*文件路径
* @param fileName
*文件名称
* @throws IOException
*/
public static void exportFile(HttpServletRequest request,
HttpServletResponse response, String csvFilePath, String fileName)
throws IOException {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/csv;charset=GBK");
response.setHeader("Content-Disposition", "attachment; filename="
new String(fileName.getBytes("GB2312"), "ISO8859-1"));
InputStream in = null;
try {
in = new FileInputStream(csvFilePath);
int len = 0;
byte[] buffer = new byte[1024];
OutputStream out = response.getOutputStream();
while ((len = in.read(buffer))0) {
out.write(buffer, 0, len);
}
} catch (FileNotFoundException e1) {
System.out.println(e1);
} finally {
if (in != null) {
try {
in.close();
} catch (Exception e1) {
throw new RuntimeException(e1);
}
}
}
}
/**
* 删除该目录filePath下的所有文件
*
* @param filePath
*文件目录路径
*/
public static void deleteFiles(String filePath) {
File file = new File(filePath);
if (file.exists()) {
File[] files = file.listFiles();
for (int i = 0; ifiles.length; i) {
if (files[i].isFile()) {
files[i].delete();
}
}
}
}
/**
* 删除单个文件
*
* @param filePath
*文件目录路径
* @param fileName
*文件名称
*/
public static void deleteFile(String filePath, String fileName) {
File file = new File(filePath);
if (file.exists()) {
File[] files = file.listFiles();
for (int i = 0; ifiles.length; i) {
if (files[i].isFile()) {
if (files[i].getName().equals(fileName)) {
files[i].delete();
return;
}
}
}
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Test
public void createFileTest() {
List exportData = https://www.04ip.com/post/new ArrayListMap();
Map row1 = new LinkedHashMapString, String();
row1.put("1", "11");
row1.put("2", "12");
row1.put("3", "13");
row1.put("4", "14");
exportData.add(row1);
row1 = new LinkedHashMapString, String();
row1.put("1", "21");
row1.put("2", "22");
row1.put("3", "23");
row1.put("4", "24");
exportData.add(row1);
LinkedHashMap map = new LinkedHashMap();
map.put("1", "第一列");
map.put("2", "第二列");
map.put("3", "第三列");
map.put("4", "第四列");
String path = "d:/export";
String fileName = "文件导出";
File file = CSVUtil.createCSVFile(exportData, map, path, fileName);
String fileNameNew = file.getName();
String pathNew = file.getPath();
System.out.println("文件名称："fileNameNew );
System.out.println("文件路径："pathNew );
}
}
//注：BeanUtils.getProperty(row,(String) propertyEntry.getKey())"\t" ，只为解决数字格式超过15位后，在Excel中打开展示科学记数问题 。
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