用java编写一个小应用程序

package test

import javax.swing.JPanel

import java.awt.*

import java.awt.event.WindowAdapter

import javax.swing.JFrame

class PaintovalPane extends JPanel {

public void paintComponent(Graphics g) {

super.paintComponent(g)

g.setColor(Color.pink)

g.fillOval(300, 300, 100, 100)

}

}

class PaintovalFrame extends JFrame {

public PaintovalFrame() {

setTitle("圆")

setSize(1000, 1000)

addWindowListener(new WindowAdapter() {

})

Container contentPane = getContentPane()

contentPane.add(new PaintovalPane())

}

}

public class Paintoval {

public static void main(String[] args) {

JFrame f = new PaintovalFrame()

f.show()

}

}

运行没问题,采纳吧,兄弟~~

单人版五子棋，自己写的。

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

import 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 = 0i <11i++)

{

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

{

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(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 = 30i <= 330i += 30)

{

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

{

g.setColor(Color.WHITE)

g.drawLine(i, j, i, 330)

}

}

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

{

g.setColor(Color.WHITE)

g.drawLine(30, j, 330, j)

}

}

void Drawchess(Graphics g)

{

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

{

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

{

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

{

g.setColor(Color.BLACK)

g.fillOval((i + 1) * 30 - 8, (j + 1) * 30 - 8, 16, 16)

}

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

{

g.setColor(Color.WHITE)

g.fillOval((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 = 0i <11i++)//横向判断

{

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

{

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 = 0i <11i++)//竖向判断

{

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

{

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 = 0i <7i++)//左向右斜判断

{

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

{

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

{

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

{

white_count++

if(white_count == 5)

{

JOptionPane.showMessageDialog(this, "白棋胜利")

Clear_Chess()

return

}

}

else

{

white_count = 0

}

}

}

}

for(i = 4i <11i++)//右向左斜判断

{

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

{

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

{

if(chess[i - k][j + k] == 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][j + k] == 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=0i<11i++)

{

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

{

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()

}

}

你把text1.addActionListener(this)换成

text1.addActionListener(

new Actionlistener(){

public void actionPerformed(ActionEvent e) {

if(e.getSource()==text1){

s=text1.getText()

if(s=="red"){

text2.setText("红色")

}

else if(s=="红色"){

text2.setText("red")

}

}

}

})

用内部匿名类或者重新自定义一个集成ActionLister的类

.addActionListener(ActionListener)方法内参数必须类型是ActionListener类，这里你直接用了this，this指这个Question5_8这个类本身，而这个类继承的是applet，使用的接口时ActionListener，所以会不能正常出结果

---