求编写一段java程序
给你个时钟吧~~
7.GDI+时钟
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
public class Clock extends JComponent {
private static final Color INTEGRAL_COLOR = new Color(0, 128, 128);
private int radius;
private Calendar currentTime = Calendar.getInstance();
private double s = 0.03;
public Clock(int radius) {
this.radius = radius;
}
public void setCurrentTime(Date time)
{
this.currentTime.setTime(time);
}
public void setCurrentTime(long millis) {
this.currentTime.setTimeInMillis(millis);
}
public Dimension getPreferredSize() {
Insets insets = getInsets();
int r = (int) (radius == -1 ? 0 : radius * (1 + s)) + 1;
return new Dimension(r * 2 + insets.left + insets.right, r * 2
+ insets.top + insets.bottom);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Insets insets = getInsets();
int wid = getWidth() - insets.left - insets.right;
int hei = getHeight() - insets.top - insets.bottom;
int r = (int) ((Math.min(wid, hei)) / 2 / (1 + s));
g2d.translate(insets.left + r * (1 + s), insets.top + r * (1 + s));
g2d.scale(1, -1);
for (int i = 0; i < 60; i++) {
int angle = 90 - i * 6;
double pos[] = calcPos(r, angle);
paintMinuteDot(r, g2d, pos[0], pos[1], i % 5 == 0);
}
paintHourPointer(r, g2d);
paintMinutePointer(r, g2d);
paintSecondPointer(r, g2d);
paintCenterPoint(g2d);
g2d.scale(1, -1);
g2d.translate(-insets.left - r * (1 + s), -insets.top - r * (1 + s));
}
private void paintCenterPoint(Graphics2D g2d) {
g2d.setColor(Color.BLUE);
Rectangle2D rect = new Rectangle2D.Double(-2, -2, 4, 4);
g2d.fill(rect);
}
private void paintMinutePointer(int r, Graphics2D g2d) {
int minute = currentTime.get(Calendar.MINUTE);
int second = currentTime.get(Calendar.SECOND);
double angle = 90 - (minute + second / 60.0) * 6;
Shape pointerShape = createPointerShape(r * 0.8, r * 0.04, r * 0.08,
angle);
g2d.setColor(Color.LIGHT_GRAY);
g2d.fill(pointerShape);
g2d.setColor(Color.DARK_GRAY);
g2d.draw(pointerShape);
}
private void paintHourPointer(int r, Graphics2D g2d) {
int hour = currentTime.get(Calendar.HOUR);
int minute = currentTime.get(Calendar.MINUTE);
int second = currentTime.get(Calendar.SECOND);
double angle = 90 - (hour + minute / 60.0 + second / 3600.0) * 30;
Shape pointerShape = createPointerShape(r * 0.6, r * 0.06, r * 0.1,
angle);
g2d.setColor(Color.LIGHT_GRAY);
g2d.fill(pointerShape);
g2d.setColor(Color.DARK_GRAY);
g2d.draw(pointerShape);
}
private Shape createPointerShape(double r1, double r2, double r3,
double angle) {
GeneralPath gp = new GeneralPath();
double[] pos = calcPos(r1, angle);
double[] pos1 = calcPos(r2, angle + 90);
gp.append(new Line2D.Double(pos[0], pos[1], pos1[0], pos1[1]), true);
double[] pos2 = calcPos(r3, angle + 180);
gp.lineTo((float) pos2[0], (float) pos2[1]);
double[] pos3 = calcPos(r2, angle + 270);
gp.lineTo((float) pos3[0], (float) pos3[1]);
gp.closePath();
return gp;
}
private void paintSecondPointer(int r, Graphics2D g2d) {
g2d.setColor(Color.BLACK);
int second = currentTime.get(Calendar.SECOND);
int angle = 90 - second * 6;
double pos[] = calcPos(r * 0.9, angle);
double pos1[] = calcPos(r * 0.2, angle + 180);
Line2D line = new Line2D.Double(pos1[0], pos1[1], pos[0], pos[1]);
g2d.draw(line);
}
private void paintMinuteDot(int r, Graphics2D g2d, double x, double y,
boolean flag) {
g2d.setColor(flag ? Color.RED : Color.BLACK);
if (flag) {
// Rectangle2D rect = new Rectangle2D.Double(
Ellipse2D rect = new Ellipse2D.Double(x - r * s, y - r * s, r * s
* 2, r * s * 2);
g2d.fill(rect);
} else {
// Rectangle2D rect = new Rectangle2D.Double(
Ellipse2D rect = new Ellipse2D.Double(x - r * 0.02, y - r * 0.02,
r * 0.04, r * 0.04);
g2d.fill(rect);
}
}
private double[] calcPos(double r, double angle) {
double radian = Math.toRadians(angle);
double x = r * Math.cos(radian);
double y = r * Math.sin(radian);
return new double[] { x, y };
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
final Clock clock = new Clock(50);
clock.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JFrame f = new JFrame("GDI+时钟");
// f.setBounds(380,200,500,600);
f.this.add(clock, BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
new Thread() {
public void run() {
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
clock.setCurrentTime(System.currentTimeMillis());
clock.repaint();
}
}
}.start();
}
}
/* Anagram Game Application */
package com.toy.anagrams.ui;
import com.toy.anagrams.lib.WordLibrary;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.TextField;
import java.awt.Toolkit;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.JRootPane;
/**
* Main window of the Anagram Game application.
*/
public class Anagrams{
public static void main(String[] args) {
new Anagrams(new JFrame("Test"));
}
private int wordIdx = 0;
private JRootPane rootPane;
public Anagrams(JFrame frame){
frame.setLayout(new BorderLayout());
initComponents();
frame.add(mainPanel);
scrambledWord.setText(WordLibrary.getScrambledWord(wordIdx));
guessedWord.requestFocusInWindow();
frame.setVisible(true);
}
/** Creates new form Anagrams */
public Anagrams() {
JFrame mainFrame = new JFrame("Anagrams");
rootPane = mainFrame.getRootPane();
initComponents();
getRootPane().setDefaultButton(guessButton);
scrambledWord.setText(WordLibrary.getScrambledWord(wordIdx));
mainFrame.pack();
guessedWord.requestFocusInWindow();
// Center in the screen
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = mainFrame.getSize();
mainFrame.setLocation(new Point((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.width) / 2));
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setVisible(true);
}
public Anagrams(JComponent topComponent){
initComponents();
topComponent.setLayout(new BorderLayout());
topComponent.add(mainPanel);
scrambledWord.setText(WordLibrary.getScrambledWord(wordIdx));
guessedWord.requestFocusInWindow();
}
private void setJMenuBar(JMenuBar menuBar){
rootPane.setJMenuBar(menuBar);
}
private JRootPane getRootPane(){
return rootPane;
}
private Container getContentPane(){
return getRootPane().getContentPane();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// //GEN-BEGIN:initComponents
private void initComponents() {
java.awt.GridBagConstraints gridBagConstraints;
mainPanel = new javax.swing.JPanel();
scrambledLabel = new javax.swing.JLabel();
scrambledWord = new javax.swing.JTextField();
guessLabel = new javax.swing.JLabel();
guessedWord = new javax.swing.JTextField();
feedbackLabel = new javax.swing.JLabel();
buttonsPanel = new javax.swing.JPanel();
guessButton = new javax.swing.JButton();
nextTrial = new javax.swing.JButton();
mainPanel.setLayout(new java.awt.GridBagLayout());
mainPanel.setBorder(new javax.swing.border.EmptyBorder(new java.awt.Insets(12, 12, 12, 12)));
mainPanel.setMinimumSize(new java.awt.Dimension(297, 200));
scrambledLabel.setText("Scrambled Word:");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 12, 6);
mainPanel.add(scrambledLabel, gridBagConstraints);
scrambledWord.setColumns(20);
scrambledWord.setEditable(false);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 12, 0);
mainPanel.add(scrambledWord, gridBagConstraints);
guessLabel.setDisplayedMnemonic('Y');
guessLabel.setLabelFor(guessedWord);
guessLabel.setText("Your Guess:");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 20, 6);
mainPanel.add(guessLabel, gridBagConstraints);
guessedWord.setColumns(20);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 20, 0);
mainPanel.add(guessedWord, gridBagConstraints);
feedbackLabel.setText(" ");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 1;
gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 20, 0);
mainPanel.add(feedbackLabel, gridBagConstraints);
buttonsPanel.setLayout(new java.awt.GridBagLayout());
guessButton.setMnemonic('G');
guessButton.setText("Guess");
guessButton.setToolTipText("Guess the scrambled word.");
guessButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
guessedWordActionPerformed(evt);
}
});
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridheight = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.weighty = 1.0;
gridBagConstraints.insets = new java.awt.Insets(0, 0, 0, 6);
buttonsPanel.add(guessButton, gridBagConstraints);
nextTrial.setMnemonic('N');
nextTrial.setText("New Word");
nextTrial.setToolTipText("Fetch a new word.");
nextTrial.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
nextTrialActionPerformed(evt);
}
});
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.gridheight = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
gridBagConstraints.weighty = 1.0;
buttonsPanel.add(nextTrial, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.gridheight = java.awt.GridBagConstraints.REMAINDER;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weighty = 1.0;
mainPanel.add(buttonsPanel, gridBagConstraints);
}
// //GEN-END:initComponents
private void nextTrialActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_nextTrialActionPerformed
wordIdx = (wordIdx + 1) % WordLibrary.getSize();
feedbackLabel.setText(" ");
scrambledWord.setText(WordLibrary.getScrambledWord(wordIdx));
guessedWord.setText("");
//getRootPane().setDefaultButton(guessButton);
guessedWord.requestFocusInWindow();
}//GEN-LAST:event_nextTrialActionPerformed
private void guessedWordActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_guessedWordActionPerformed
if (WordLibrary.isCorrect(wordIdx, guessedWord.getText())){
feedbackLabel.setText("Correct! Try a new word!");
//getRootPane().setDefaultButton(nextTrial);
} else {
feedbackLabel.setText("Incorrect! Try again!");
guessedWord.setText("");
}
guessedWord.requestFocusInWindow();
}//GEN-LAST:event_guessedWordActionPerformed
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JPanel buttonsPanel;
private javax.swing.JLabel feedbackLabel;
private javax.swing.JButton guessButton;
private javax.swing.JLabel guessLabel;
private javax.swing.JTextField guessedWord;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton nextTrial;
private javax.swing.JLabel scrambledLabel;
private javax.swing.JTextField scrambledWord;
// End of variables declaration//GEN-END:variables
}
请参考，记得采纳我
是不是这样的，最左边是服务器回复窗口，中间是服务器监控聊天人员，链表存储进入的人，右边是客户端聊天发送消息窗口，从右边发送消息，服务器可以接受，并显示在左边，左边服务器也可以回复消息到客户端。
客户端代码：
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JButton;
public class ChatClient extends JFrame
{
private static final long serialVersionUID = 1L;
JTextArea ta = new JTextArea("你可以通过此客户端的群聊!" + "
" + "发送快捷键 ALT+ENTER
");
TextArea tf = new TextArea(3, 21);
JButton btn = new JButton("发送");
JPanel jp = new JPanel();
Socket s = null;
public ChatClient() throws Exception
{
this.setLayout(new BorderLayout(10, 10));
this.add(ta, BorderLayout.CENTER);
jp.add(btn, BorderLayout.SOUTH);
this.add(tf, BorderLayout.SOUTH);
this.add(jp, BorderLayout.EAST);
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
try
{
String sSend = tf.getText();
if (sSend.trim().length() == 0)
return;
ChatClient.this.send(sSend);
tf.setText("");
ta.append("你自己说:" + "
");
ta.append(sSend + "
");
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
btn.setMnemonic(KeyEvent.VK_ENTER);
this.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
setBounds(300, 300, 400, 500);
setVisible(true);
tf.requestFocus();
try
{
s = new Socket("localhost", 8888);
}
catch (Exception e)
{
ta.append("对不起！无法连接服务器" + "
");
}
(new Thread(new ReceiveThread())).start();
}
public void send(String str) throws Exception
{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(str);
}
public void disconnect() throws Exception
{
s.close();
}
public static void main(String[] args) throws Exception
{
JFrame.setDefaultLookAndFeelDecorated(true);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
ChatClient cc = new ChatClient();
String str = br.readLine();
while (str != null && str.length() != 0)
{
cc.send(str);
str = br.readLine();
}
cc.disconnect();
}
class ReceiveThread implements Runnable
{
public void run()
{
if (s == null)
return;
try
{
DataInputStream dis = new DataInputStream(s.getInputStream());
String str = dis.readUTF();
while (str != null && str.length() != 0)
{
ChatClient.this.ta.append(str + "
");
str = dis.readUTF();
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
服务端代码：
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JTextArea;
public class ChatServer extends JFrame
{
private static final long serialVersionUID = 1L;
JTextArea ta = new JTextArea();
ServerSocket server = null;
Collection<ClientConn> cClient = new ArrayList<ClientConn>();
public ChatServer(int port) throws Exception
{
server = new ServerSocket(port);
add(ta, BorderLayout.CENTER);
setBounds(200, 200, 300, 450);
this.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
setVisible(true);
}
public void startServer() throws Exception
{
while (true)
{
Socket s = server.accept();
cClient.add(new ClientConn(s));
ta.append(s.getInetAddress().getHostName() + "进入" + " " + "端口号"
+ s.getPort());
ta.append("
" + "当前在前总人数： " + cClient.size() + "
");
}
}
@SuppressWarnings("serial")
class ClientConn extends Frame implements Runnable, ActionListener
{
TextArea ta1 = null;
TextArea ta2 = null;
Button btn = null;
Socket s = null;
public ClientConn(Socket s)
{
ta1 = new TextArea(3, 30);
ta2 = new TextArea(2, 15);
btn = new Button("发送");
this.setLayout(new BorderLayout());
this.add(ta1, BorderLayout.CENTER);
this.add(ta2, BorderLayout.SOUTH);
this.add(btn, BorderLayout.EAST);
this.setSize(300, 200);
this.setVisible(true);
this.setTitle("" + s.getInetAddress().getHostName() + "端口"
+ s.getPort());
this.s = s;
(new Thread(this)).start();
btn.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
try
{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF("服务器:
" + ta2.getText() + "
");
ta1.append("服务器:
" + ta2.getText() + "
");
ta2.setText("");
}
catch (IOException E)
{
}
}
public void send(String str, String st) throws IOException
{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(st + "说:
" + str);
}
public void dispose()
{
try
{
// this.setVisible(false);
super.dispose();
ta.append(s.getInetAddress().getHostName() + "退出" + "
");
if (s != null)
s.close();
cClient.remove(this);
ta.append("当前在线人数: " + cClient.size() + "
");
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void run()
{
try
{
DataInputStream dis = new DataInputStream(s.getInputStream());
String str = dis.readUTF();
String st = s.getInetAddress().getHostName();
while (str != null && str.length() != 0)
{
for (Iterator<ClientConn> it = cClient.iterator(); it.hasNext();)
{
ClientConn cc = (ClientConn) it.next();
if (this != cc)
{
cc.send(str, st);
}
}
ta1.append(st + "说:
" + str + "
");
str = dis.readUTF();
}
this.dispose();
}
catch (Exception e)
{
this.dispose();
}
}
}
public static void main(String[] args) throws Exception
{
JFrame.setDefaultLookAndFeelDecorated(true);
ChatServer cs = new ChatServer(8888);
cs.startServer();
}
}
大哥，我猜没有人会专门帮你写，你自己去csdn上下载呀，哪里的例子多得很呢。
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答：获取键盘输入Scanner scanner = new Scanner(System.in);// 用k来存储0~1000的随机数k = random.nextInt(1000);System.out.println("游戏开始,请输入一个在0~1000内的数");//用i来获取键盘输入i = scanner.nextInt();//当i不等于k时,进行循环while (i != k) {n++;if (i > k) {...
求一个简单java程序代码,谢谢
答：(i == 3) { for (int y = 0; y < 2; y++) { System.out.print(" " + star + " ");} } } } } 是好使的 但是我没找到画五角星有什么规律（五角星好象不是正规图形吧？）如果还有什么要求的话 补充问题(如果是用*填充所有的东西 不包括 “ ”的话 我可以重新再给你写一个)...
