一个Java小程序源代码

一个Java小程序源代码 一个Java小程序源代码(反转字符串) //BorderLayoutTest.java import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.*; import javax.swing.event.*; public class test1 { public static void main(String[] args) { cloneFrame frame = new cloneFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.show(); } } class cloneFrame extends JFrame { public cloneFrame() { setTitle("机试程序"); setSize(600, 400); JPanel buttonPanel = new JPanel(); buttonPanel.setBackground(new Color(56,43,85)); Button1 = new JButton("点击复制反转字符串"); Button1.addActionListener(new turnListener()); buttonPanel.add(Button1); JPanel textPanel = new JPanel(); textPanel.setBackground(new Color(100,100,100)); field1 = new JTextField("姓名:老孙;学号:2004132028", 20); field2 = new JTextField("反转", 20); field2.setEditable(false); textPanel.add(field1); textPanel.add(field2); JPanel tuPanel = new JPanel(); JLabel label = new JLabel(new ImageIcon("006.gif")); tuPanel.add(label); tuPanel.setBackground(new Color(100,100,100)); Container contentPane = getContentPane(); contentPane.add(buttonPanel, BorderLayout.SOUTH); contentPane.add(textPanel, BorderLayout.NORTH); contentPane.add(tuPanel, BorderLayout.CENTER); contentPane.setBackground(new Color(100,100,100)); } private class turnListener implements ActionListener { public void actionPerformed(ActionEvent event) { String gets = field1.getText(); int i = gets.length(); StringBuffer buffer = new StringBuffer(i); for(int j=i-1;j>=0;j--) { buffer.append(gets.charAt(j)); } String gets2 = buffer.toString(); field2.setText(gets2); } } Container contentPane = getContentPane(); contentPane.add(buttonPanel, BorderLayout.SOUTH); contentPane.add(textPanel, BorderLayout.NORTH); contentPane.add(tuPanel, BorderLayout.CENTER); contentPane.setBackground(new Color(100,100,100)); } private class turnListener implements ActionListener { public void actionPerformed(ActionEvent event) { String gets = field1.getText(); int i = gets.length(); StringBuffer buffer = new StringBuffer(i); for(int j=i-1;j>=0;j--) { buffer.append(gets.charAt(j)); } String gets2 = buffer.toString(); field2.setText(gets2); } } private JButton Button1; private JTextField field1; private JTextField field2; } Java1 package com.kenki.emp; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*; import java.sql.SQLException; import java.sql.*; public class emp extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=GBK"; //Initialize global variables public void init() throws ServletException { } //Process the HTTP Get request public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); String code = request.getParameter("code"); String name = request.getParameter("name"); String pay = request.getParameter("pay"); System.out.println("empcode:" + code); System.out.println("name:" + name); System.out.println("pay:" + pay); //创建驱动 new com.microsoft.jdbc.sqlserver.SQLServerDriver(); String strd = "jdbc:microsoft:sqlserver://localhost:1433;databasename=emp_dates"; String username = "sa"; String pws = ""; try { java.sql.Connection conn = java.sql.DriverManager.getConnection( strd, username, pws); String strs = "insert into emp values(?,?,?)"; java.sql.PreparedStatement pre = conn.prepareStatement(strs); pre.setString(1, code); pre.setString(2, name); pre.setString(3, pay); pre.execute(); pre.close(); conn.close(); //重定向至查询页面 out.println("成功保存～～"); response.sendRedirect("emp.html"); } catch (SQLException ss) { ss.printStackTrace(); response.sendRedirect("/WebModule1/error.html"); } } //Process the HTTP Post request public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } //Clean up resources public void destroy() { } } Java2 //这是个聊天程序， 在ECLIPSE 运行 Client.java 就可以了。 连接是:localhost //Server 代码， package message; import java.io.*; import java.net.*; import java.util.*; public class Server { public static void main(String[] args) throws Exception{ System.out.print("Server"); ServerSocket socket=new ServerSocket(8888); Vector v=new Vector(); while(true){ Socket sk=socket.accept(); DataInputStream in=new DataInputStream(sk.getInputStream()); DataOutputStream out=new DataOutputStream(sk.getOutputStream()); v.add(sk); new ServerThread(in,v).start(); } } } //ServerThread.java 代码 package message; import java.net.*; import java.io.*; import java.util.*; public class ServerThread extends Thread{ DataInputStream in; Vector all; public ServerThread(DataInputStream in,Vector v){ this.in=in; this.all=v; } public void run() { while(true) { try{ String s1=in.readUTF(); for(int i=0;inum) System.out.println("输入的数大了，输小点的～"); else if (shu guessnumber) System.out.println("你输入的数小了请重新输入～"); count++; flag = true; } if (number == guessnumber) { System.out.println("你真历害这么快你就猜对了!"); System.out.println("你一共猜了" + count + "次"); flag = false; System.out.println("请输入你的名字:"); String name = stdin.readLine(); byte names[] = name.getBytes("ISO-8859-1"); userName = new String(names); System.out.println("姓名:" + userName); System.out.println("记录是:" + count + "次"); SaveFile save = new SaveFile(); save.output(userName, 0, userName.length()); } // guessnumber=Integer.parseInt(stdin.readLine()); } stdin.close(); buffin.close(); } catch (IOException e) { e.getMessage(); // e.toString(); System.out.println("产生了异常～"); } } public static void main(String[] args) { GuessNumber gus = new GuessNumber(); gus.show(); /* * try{ System.out.println("按回车结束....."); System.in.read(); } * catch(IOException e){} */ } private static String input; // 用户开始输入数字或字母 private static int number; // 产生的随机数 private static int guessnumber;// 用户输入的的数字 private static int count = 0; // 用统计用户猜的次数 private boolean flag = true; // 标记继续输入数字进行猜 private String userName; // 用来记录猜对的用户名字 } class SaveFile { // 这个方法是将传过来的名字写入文件里 public void output(String name, int a, int length) { try { FileWriter sout = new FileWriter("Gamererecord.txt"); BufferedWriter out = new BufferedWriter(sout); sout.write(name, 0, length); sout.close(); out.close(); } catch (IOException e) { System.out.println("IO Error" + e); } } } 可以直接出结果的，不过你得先建立一个名为GuessNumber的包，在此包下建立一个名为GuessNumber的类，然后将些段代码粘贴进来根据提示就可以出结果的 JAVA小游戏代码 int player1win,player2win; protected synchronized void keyPressed(int keyCode){ ... else if(action == Canvas.FIRE){ if(chesses[selectedY][selectedX]==null){ chesses[selectedY][selectedX]=new Chesses(this.isPlayer1); if(checkWin()){ String winner; if(isPlayer1){ winner="白方胜利"; player1win++; } else{ winner="红方胜利"; player2win++; } try{ Thread.sleep(3000); }catch(Exception e){ } Alert winAlert=new Alert("", winner+"\n白方 "+player1win+":"+player2win+"红方", null,AlertType.INFO); winAlert.setTimeout(Alert.FOREVER); Display.getDisplay(gobang).setCurrent(winAlert,this); init(); repaint(); } this.isPlayer=!this.isPlayer1;//切换下棋方 } } repaint(); } private boolean checkWin(){ int num=1; if(num<5){ num=1; for(int i=1;i<4;i++){ if(isPlayer1(selectedX-i,selectedY)){ num++; } ease break; } for(int i=1;i<4;i++){ if(isPlayer1(selectedX+1,selectedY)){ num++; } else break; } } if(num<5){ num=1; for(int i=1;i<4;i++){ if(isPlayer1(selectedX-i,selectedY)){ num++; } ease break; } for(int i=1;i<4;i++){ if(isPlayer1(selectedX+1,selectedY)){ num++; } else break; } } if(num<5{ num=1; for(int i=1;i<=4;i++){ if(isPlayer1(sesectedX,selectedY-i)){ num++; } ease break; } for(int i=1;i<=4;i++){ if(isPlayer1(selectedX.,selectedY+i)) num++; else break; } } if(num<5){ num=1; for(int i=1;i<=4;i++){ if(isPlayer1(selectedX+i,selectedY-i)) num++; else break; } for(int i=1;i<=4;i++){ if(isPlayer1(selectedX-i,selectedY+i)) num++; else break; } } if(num>=5) return true; else return false; } private boolean isPlayer1(int y,int x){ if(x<=15 && x>=0 && y<=15 && y>=0 && chesses[x][y]!=null){ if(chesses[x][y].isPlayer1==this.isPlayer1) return true; else return false; } else return fale; } JAVA计算器源代码 import java.awt.*; import java.awt.event.*; import java.lang.*; import javax.swing.*; public class Counter extends Frame { //声明三个面板的布局 GridLayout gl1,gl2,gl3; Panel p0,p1,p2,p3; JTextField tf1; TextField tf2; Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19 ,b20,b21,b22,b23,b24,b25,b26; StringBuffer str;//显示屏所显示的字符串 double x,y;//x和y都是运算数 int z;//Z

表

关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf

示单击了那一个运算符.0表示"+",1表示"-",2表示"*",3表示"/" static double m;//记忆的数字 public Counter() { gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局 gl2=new GridLayout(4,1,0,15); gl3=new GridLayout(4,5,10,15); tf1=new JTextField(27);//显示屏 tf1.setHorizontalAlignment(JTextField.RIGHT); tf1.setEnabled(false); tf1.setText("0"); tf2=new TextField(10);//显示记忆的索引值 tf2.setEditable(false); //实例化所有按钮、设置其前景色并注册监听器 b0=new Button("Backspace"); b0.setForeground(Color.red); b0.addActionListener(new Bt()); b1=new Button("CE"); b1.setForeground(Color.red); b1.addActionListener(new Bt()); b2=new Button("C"); b2.setForeground(Color.red); b2.addActionListener(new Bt()); b3=new Button("MC"); b3.setForeground(Color.red); b3.addActionListener(new Bt()); b4=new Button("MR"); b4.setForeground(Color.red); b4.addActionListener(new Bt()); b5=new Button("MS"); b5.setForeground(Color.red); b5.addActionListener(new Bt()); b6=new Button("M+"); b6.setForeground(Color.red); b6.addActionListener(new Bt()); b7=new Button("7"); b7.setForeground(Color.blue); b7.addActionListener(new Bt()); b8=new Button("8"); b8.setForeground(Color.blue); b8.addActionListener(new Bt()); b9=new Button("9"); b9.setForeground(Color.blue); b9.addActionListener(new Bt()); b10=new Button("/"); b10.setForeground(Color.red); b10.addActionListener(new Bt()); b11=new Button("sqrt"); b11.setForeground(Color.blue); b11.addActionListener(new Bt()); b12=new Button("4"); b12.setForeground(Color.blue); b12.addActionListener(new Bt()); b13=new Button("5"); b13.setForeground(Color.blue); b13.addActionListener(new Bt()); b14=new Button("6"); b14.setForeground(Color.blue); b14.addActionListener(new Bt()); b15=new Button("*"); b15.setForeground(Color.red); b15.addActionListener(new Bt()); b16=new Button("%"); b16.setForeground(Color.blue); b16.addActionListener(new Bt()); b17=new Button("1"); b17.setForeground(Color.blue); b17.addActionListener(new Bt()); b18=new Button("2"); b18.setForeground(Color.blue); b18.addActionListener(new Bt()); b19=new Button("3"); b19.setForeground(Color.blue); b19.addActionListener(new Bt()); b20=new Button("-"); b20.setForeground(Color.red); b20.addActionListener(new Bt()); b21=new Button("1/X"); b21.setForeground(Color.blue); b21.addActionListener(new Bt()); b22=new Button("0"); b22.setForeground(Color.blue); b22.addActionListener(new Bt()); b23=new Button("+/-"); b23.setForeground(Color.blue); b23.addActionListener(new Bt()); b24=new Button("."); b24.setForeground(Color.blue); b24.addActionListener(new Bt()); b25=new Button("+"); b25.setForeground(Color.red); b25.addActionListener(new Bt()); b26=new Button("="); b26.setForeground(Color.red); b26.addActionListener(new Bt()); //实例化四个面板 p0=new Panel(); p1=new Panel(); p2=new Panel(); p3=new Panel(); //创建一个空字符串缓冲区 str=new StringBuffer(); //添加面板p0中的组件和设置其在框架中的位置和大小 p0.add(tf1); p0.setBounds(10,25,300,40); //添加面板p1中的组件和设置其在框架中的位置和大小 p1.setLayout(gl1); p1.add(tf2); p1.add(b0); p1.add(b1); p1.add(b2); p1.setBounds(10,65,300,25); //添加面板p2中的组件并设置其的框架中的位置和大小 p2.setLayout(gl2); p2.add(b3); p2.add(b4); p2.add(b5); p2.add(b6); p2.setBounds(10,110,40,150); //添加面板p3中的组件并设置其在框架中的位置和大小 p3.setLayout(gl3);//设置p3的布局 p3.add(b7); p3.add(b8); p3.add(b9); p3.add(b10); p3.add(b11); p3.add(b12); p3.add(b13); p3.add(b14); p3.add(b15); p3.add(b16); p3.add(b17); p3.add(b18); p3.add(b19); p3.add(b20); p3.add(b21); p3.add(b22); p3.add(b23); p3.add(b24); p3.add(b25); p3.add(b26); p3.setBounds(60,110,250,150); //设置框架中的布局为空布局并添加4个面板 setLayout(null); add(p0); add(p1); add(p2); add(p3); setResizable(false);//禁止调整框架的大小 //匿名类关闭窗口 addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e1) { System.exit(0); } }); setBackground(Color.lightGray); setBounds(100,100,320,280); setVisible(true); } //构造监听器 class Bt implements ActionListener { public void actionPerformed(ActionEvent e2) { try{ if(e2.getSource()==b1)//选择"CE"清零 { tf1.setText("0");//把显示屏清零 str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数 } else if(e2.getSource()==b2)//选择"C"清零 { tf1.setText("0");//把显示屏清零 str.setLength(0); } else if(e2.getSource()==b23)//单击"+/-"选择输入的运算数是正数还是负数 { x=Double.parseDouble(tf1.getText().trim()); tf1.setText(""+(-x)); } else if(e2.getSource()==b25)//单击加号按钮获得x的值和z的值并清空y的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0);//清空缓冲区以便接收新的另一个运算数 y=0d; z=0; } else if(e2.getSource()==b20)//单击减号按钮获得x的值和z的值并清空y的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0); y=0d; z=1; } else if(e2.getSource()==b15)//单击乘号按钮获得x的值和z的值并清空y的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0); y=0d; z=2; } else if(e2.getSource()==b10)//单击除号按钮获得x的值和z的值并空y的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0); y=0d; z=3; } else if(e2.getSource()==b26)//单击等号按钮输出计算结果 { str.setLength(0); switch(z) { case 0 : tf1.setText(""+(x+y));break; case 1 : tf1.setText(""+(x-y));break; case 2 : tf1.setText(""+(x*y));break; case 3 : tf1.setText(""+(x/y));break; } } else if(e2.getSource()==b24)//单击"."按钮输入小数 { if(tf1.getText().trim().indexOf(′.′)!=-1)//判断字符串中是否已经包含了小数点 { } else//如果没数点有小 { if(tf1.getText().trim().equals("0"))//如果初时显示为0 { str.setLength(0); tf1.setText((str.append("0"+e2.getActionCommand())).toString()); } else if(tf1.getText().trim().equals(""))//如果初时显示为空则不做任何操作 { } else { tf1.setText(str.append(e2.getActionCommand()).toString()); } } y=0d; } else if(e2.getSource()==b11)//求平方根 { x=Double.parseDouble(tf1.getText().trim()); tf1.setText("数字格式异常"); if(x<0) tf1.setText("负数没有平方根"); else tf1.setText(""+Math.sqrt(x)); str.setLength(0); y=0d; } else if(e2.getSource()==b16)//单击了"%"按钮 { x=Double.parseDouble(tf1.getText().trim()); tf1.setText(""+(0.01*x)); str.setLength(0); y=0d; } else if(e2.getSource()==b21)//单击了"1/X"按钮 { x=Double.parseDouble(tf1.getText().trim()); if(x==0) { tf1.setText("除数不能为零"); } else { tf1.setText(""+(1/x)); } str.setLength(0); y=0d; } else if(e2.getSource()==b3)//MC为清除内存 { m=0d; tf2.setText(""); str.setLength(0); } else if(e2.getSource()==b4)//MR为重新调用存储的数据 { if(tf2.getText().trim()!="")//有记忆数字 { tf1.setText(""+m); } } else if(e2.getSource()==b5)//MS为存储显示的数据 { m=Double.parseDouble(tf1.getText().trim()); tf2.setText("M"); tf1.setText("0"); str.setLength(0); } else if(e2.getSource()==b6)//M+为将显示的数字与已经存储的数据相加要查看新的数字单击MR { m=m+Double.parseDouble(tf1.getText().trim()); } else//选择的是其他的按钮 { if(e2.getSource()==b22)//如果选择的是"0"这个数字键 { if(tf1.getText().trim().equals("0"))//如果显示屏显示的为零不做操作 { } else { tf1.setText(str.append(e2.getActionCommand()).toString()); y=Double.parseDouble(tf1.getText().trim()); } } else if(e2.getSource()==b0)//选择的是“BackSpace”按钮 { if(!tf1.getText().trim().equals("0"))//如果显示屏显示的不是零 { if(str.length()!=1) { tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能抛出字符串越界异常 } else { tf1.setText("0"); str.setLength(0); } } y=Double.parseDouble(tf1.getText().trim()); } else//其他的数字键 { tf1.setText(str.append(e2.getActionCommand()).toString()); y=Double.parseDouble(tf1.getText().trim()); } } } catch(NumberFormatException e){ tf1.setText("数字格式异常"); } catch(StringIndexOutOfBoundsException e){ tf1.setText("字符串索引越界"); } } } public static void main(String args[]) { new Counter(); } } 简洁java计算器代码 import java.awt.*; import java.awt.event.*; import javax.swing.*; //引入所需要的包 class MyFrame extends JFrame implements ActionListener{ private JButton b1,b2,b3,b4,b5,b6; private TextField t1,t2,t3; //定义六个按钮和三个文本域 public MyFrame(String s){ super(s); b1=new JButton("加"); b2=new JButton("减"); b3=new JButton("乘"); b4=new JButton("除"); //对按钮加文字标签 Panel p=new Panel(); //生成一个面板 p.setLayout(new FlowLayout()); //以FlowLayout来规划面板中的组件 t1=new TextField ("",4); t2=new TextField("",4); t3=new TextField("",4); //生成文本域并设置长度 p.add(new JLabel("Num1"));p.add(t1); p.add(new JLabel("Num2"));p.add(t2); p.add(new JLabel("Res"));p.add(t3);//顺次在面板中加入按钮和文本域 t3.setEditable(false); //设置t3不可编辑 Panel button=new Panel(); button.setLayout(new GridLayout(2,2));//以两行2列来布局button面板中的各组件 button.add(b1);button.add(b2);button.add(b3); button.add(b4); getContentPane().add(button,BorderLayout.SOUTH); getContentPane().add(p,BorderLayout.NORTH); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); //注册事件监听器 } public void actionPerformed(ActionEvent e){ //实现接口方法 double number1=Double.parseDouble(t1.getText()); double number2=Double.parseDouble(t2.getText());//得到文本域中的数字字符串调用parseDouble()

函数

excel方差函数excelsd函数已知函数     2 f x m x mx m      2 1 4 2拉格朗日函数pdf函数公式下载

转化为数值型数字 if(e.getSource()==b1) { double result=number1+number2; t3.setText(String.valueOf(result));//实现+ } if(e.getSource()==b2) { double result=number1-number2; 实现- t3.setText(String.valueOf(result));//} if(e.getSource()==b3) { double result=number1*number2; //实现* t3.setText(String.valueOf(result)); } if(e.getSource()==b4) //实现/ { double result=number1/number2; t3.setText(String.valueOf(result)); } } } public class Calculator{ public static void main(String[] args){ MyFrame frm=new MyFrame("Welcome to my calculator"); //设置标题 frm.setSize(320,240); //设置大小 frm. setVisible(true);//可见 } }