请高手们帮帮忙,"玩"一个大家来找茬的游戏!急!谢谢了!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class test extends JFrame
{
JFrame frm;
JButton but1,but2,but3;
JPanel panel,p,pan[];
static int j=0;
Container con;
public test()
{
JFrame.setDefaultLookAndFeelDecorated(true);
frm=new JFrame();
con=frm.getContentPane();
//放置按钮
panel=new JPanel();
but1=new JButton( "三角形 ");
but2=new JButton( "矩形 ");
but3=new JButton( "椭圆形 ");
button bt=new button();
but1.addActionListener(bt);
but2.addActionListener(bt);
but3.addActionListener(bt);
panel.add(but1);
panel.add(but2);
panel.add(but3);
con.add(panel,BorderLayout.NORTH);
//放置窗口下方的面板
p=new JPanel();
p.setLayout(new GridLayout(3,3,1,1));
//在窗口下方的面板上放置9个小面板
pan=new JPanel[9];
for(int i=0;i <9;i++)
{
pan[i]=new JPanel();
pan[i].setLayout(new GridLayout(1,1));
p.add(pan[i]);
}
con.add(p,BorderLayout.CENTER);
frm.setTitle( "绘制图形 ");
frm.setSize(500,400);
frm.setVisible(true);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setResizable(false);
frm.show();
}
class button implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if(j <9){
if(e.getSource()==but1)
{
pan[j].add(new Triangle());
frm.validate(); //刷新窗口，否则图形无法显示
}
else if(e.getSource()==but2)
{
pan[j].add(new rect());
frm.validate();
}
else if (but3==e.getSource())
{
pan[j].add(new Ellipse());
frm.validate();
}
j++;
}
}
}
public static void main(String age[])
{
new test();
}
}
//三个图形类定义在外部
class Triangle extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.cyan);
int a=this.getSize().width;
int b=this.getSize().height;
int xpoints[]={a/2,0,a};
int ypoints[]={0,b,b};
g.fillPolygon(xpoints,ypoints,3);
}
}
class rect extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.red);
//a=pan[j].getSize().width;
//b=pan[j].getSize().height;
//g.fillRect(a-10,b-10,a-60,a-30);
g.fillRect(0,0,this.getSize().width,this.getSize().height);
}
}
class Ellipse extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.blue);
g.fillOval(0,0,this.getSize().width,this.getSize().height);
}
}
________________________________________
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class test extends JFrame
{
JFrame frm;
JButton but1,but2,but3;
JPanel panel,p,pan[];
static int j=0;
container con;
public test()
{
JFrame.setDefaultLookAndFeelDecorated(true);
frm=new JFrame();
con=frm.getContentPane();
panel=new JPanel();
but1=new JButton( "三角形 ");
but2=new JButton( "矩形 ");
but3=new JButton( "椭圆形 ");
button bt=new button();
but1.addActionListener(bt);
but2.addActionListener(bt);
but3.addActionListener(bt);
panel.add(but1);
panel.add(but2);
panel.add(but3);
con.add(panel,BorderLayout.NORTH);
p=new JPanel();
p.setLayout(new GridLayout(3,3,1,1));
//在窗口下方的面板上放置9个小面板
pan=new JPanel[9];
for(int i=0;i <9;i++)
{
pan[i]=new JPanel();
pan[i].setLayout(new GridLayout(1,1));
p.add(pan[i]);
}
con.add(p,BorderLayout.CENTER);
frm.setTitle( "绘制图形 ");
frm.setSize(500,400);
frm.setVisible(true);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setResizable(false);
frm.show();
}
class button implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if(j <9)
{
if(e.getSource()==but1)
{
pan[j].add(new Triangle());
frm.validate(); //刷新窗口，否则图形无法显示
}
else if(e.getSource()==but2)
{
pan[j].add(new rect());
frm.validate();
}
else if (but3==e.getSource())
{
pan[j].add(new Ellipse());
frm.validate();
}
j++;
}
}
}
public static void main(String age[])
{
new test();
}
}
class Triangle extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.cyan);
int a=this.getSize().width;
int b=this.getSize().height;
int xpoints[]={a/2,0,a};
int ypoints[]={0,b,b};
g.fillPolygon(xpoints,ypoints,3);
}
}
class rect extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.red);
//a=pan[j].getSize().width;
//b=pan[j].getSize().height;
//g.fillRect(a-10,b-10,a-60,a-30);
g.fillRect(0,0,this.getSize().width,this.getSize().height);
}
}
class Ellipse extends JPanel
{
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.setColor(Color.blue);
g.fillOval(0,0,this.getSize().width,this.getSize().height);
}
}
___________________________________
有谁可以告诉我这两个程序哪里不一样呀!为什么第一个程序可以运行,第二个会出错!!急!
谢谢呀!
[解决办法]
LZ您是不是应该把报错信息发出来 你发一堆程序 很少有人有这耐心 每天看自己程序头都大了。。。。。。。。。。。。。。。。。。
[解决办法]
java是区分大小写的：
conntainer没大写，应该是Container。
fillrect没大写，应该是fillRect。
