编写一个Java的小程序Applet

import javaawt;

import javaawtevent;

import javaapplet;

public class Try extends Applet implements ActionListener

{

public void init()

{

Button b=new Button("请按按钮");

baddActionListener(this);

add(b);

}

public void actionPerformed(ActionEvent e)

{

Frame f=new Frame("警告");

fsetSize(200,100);

fsetLocation(300,300);

fadd(new Label("你按了按钮！"));

fsetVisible(true);

}

}

单人版五子棋，自己写的。

------------------------------------------

import javaawt;

import javaawtevent;

import javaxswing;

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;i < 11;i++)

{

for(int j = 0;j < 11;j++)

{

chess[i][j] = 0;

}

}

addMouseListener(this);

setBackground(ColorBLUE);

setBounds(0, 0, 360, 360);

setVisible(true);

}

public void mousePressed(MouseEvent e)

{

int x = egetX();

int y = egetY();

if(x < 25 || x > 330 + 25 ||y < 25 || y > 330+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)

{

gsetColor(ColorWHITE);

gdrawLine(i, j, i, 330);

}

}

for(int j = 30;j <= 330;j += 30)

{

gsetColor(ColorWHITE);

gdrawLine(30, j, 330, j);

}

}

void Drawchess(Graphics g)

{

for(int i = 0;i < 11;i++)

{

for(int j = 0;j < 11;j++)

{

if(chess[i][j] == 1)

{

gsetColor(ColorBLACK);

gfillOval((i + 1) 30 - 8, (j + 1) 30 - 8, 16, 16);

}

if(chess[i][j] == 2)

{

gsetColor(ColorWHITE);

gfillOval((i + 1) 30 - 8, (j + 1) 30 - 8, 16, 16);

}

}

}

}

void Justisewiner()

{

int black_count = 0;

int white_count = 0;

int i = 0;

for(i = 0;i < 11;i++)//横向判断

{

for(int j = 0;j < 11;j++)

{

if(chess[i][j] == 1)

{

black_count++;

if(black_count == 5)

{

JOptionPaneshowMessageDialog(this, "黑棋胜利");

Clear_Chess();

return;

}

}

else

{

black_count = 0;

}

if(chess[i][j] == 2)

{

white_count++;

if(white_count == 5)

{

JOptionPaneshowMessageDialog(this, "白棋胜利");

Clear_Chess();

return;

}

}

else

{

white_count = 0;

}

}

}

for(i = 0;i < 11;i++)//竖向判断

{

for(int j = 0;j < 11;j++)

{

if(chess[j][i] == 1)

{

black_count++;

if(black_count == 5)

{

JOptionPaneshowMessageDialog(this, "黑棋胜利");

Clear_Chess();

return;

}

}

else

{

black_count = 0;

}

if(chess[j][i] == 2)

{

white_count++;

if(white_count == 5)

{

JOptionPaneshowMessageDialog(this, "白棋胜利");

Clear_Chess();

return;

}

}

else

{

white_count = 0;

}

}

}

for(i = 0;i < 7;i++)//左向右斜判断

{

for(int j = 0;j < 7;j++)

{

for(int k = 0;k < 5;k++)

{

if(chess[i + k][j + k] == 1)

{

black_count++;

if(black_count == 5)

{

JOptionPaneshowMessageDialog(this, "黑棋胜利");

Clear_Chess();

return;

}

}

else

{

black_count = 0;

}

if(chess[i + k][j + k] == 2)

{

white_count++;

if(white_count == 5)

{

JOptionPaneshowMessageDialog(this, "白棋胜利");

Clear_Chess();

return;

}

}

else

{

white_count = 0;

}

}

}

}

for(i = 4;i < 11;i++)//右向左斜判断

{

for(int j = 6;j >= 0;j--)

{

for(int k = 0;k < 5;k++)

{

if(chess[i - k][j + k] == 1)

{

black_count++;

if(black_count == 5)

{

JOptionPaneshowMessageDialog(this, "黑棋胜利");

Clear_Chess();

return;

}

}

else

{

black_count = 0;

}

if(chess[i - k][j + k] == 2)

{

white_count++;

if(white_count == 5)

{

JOptionPaneshowMessageDialog(this, "白棋胜利");

Clear_Chess();

return;

}

}

else

{

white_count = 0;

}

}

}

}

}

void Clear_Chess()

{

for(int i=0;i<11;i++)

{

for(int j=0;j<11;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);

panelsetBounds(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)

{

Systemexit(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();

}

}

package cntext;

import javaio;

import javautilScanner;

public class Demo {

public static void main(String[] args) throws Exception {

Scanner input = new Scanner(Systemin) ;

inputuseDelimiter("\n");

File file = new File("d:" + Fileseparator+"stutxt") ; //保存文件到d盘stutxt

PrintStream output = new PrintStream(new FileOutputStream(file));

for(int i = 0 ; i < 5 ; i ++) {

Systemoutprintln("请输入第" + (i+1) + "个学生信息，按回车键结束");

if(inputhasNext()) {

String str = inputnext();

outputprintln(str);

}

}

inputclose();

outputclose();

}

}

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