import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class EEE extends JApplet implements ActionListener{
JTable table;
Object a[][];
JPanel p1,p2;
Object name[]={"第一列","第二列"};
JButton button;
JTextField text;
public void init(){
a= new Object[2][2];
button =new JButton("确定");
text = new JTextField(8);
p1 = new JPanel();
p2 = new JPanel();
p1.setLayout(new GridLayout(2,1));
p1.add(new Label("输入2阶行列式的元素"));
p1.add(new Label("输入或者修改数据后，用鼠标点击每个格，使数据生效"));
p2.add(button);
p2.add(new JLabel("结果"));
p2.add(text);
table =new JTable(a,name);
button.addActionListener(this);
getContentPane().add(new JScrollPane(table),BorderLayout.CENTER);
getContentPane().add(p1,BorderLayout.NORTH);
getContentPane().add(p2,BorderLayout.SOUTH);
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(e.getSource()==button)
{
double d[][]=new double[2][2];
double result;
for(int i=0;i<2;i++)
{
for(int j=0;j<2;j++)
{
d[i][j]=Double.valueOf(a[i][j].toString()).doubleValue();
}
}
result = d[1][1]*d[0][0] - d[0][0]*d[0][1];
text.setText(String.valueOf(result));
}
}
}