- import java.awt.event.ActionEvent;
- import java.awt.event.ActionListener;
- import javax.swing.JButton;
- import javax.swing.JFrame;
- import javax.swing.JLabel;
- import javax.swing.JTextField;
- public class Ch80 implements ActionListener
- {
- JFrame fm;
- JLabel lb1,lb2;
- JTextField tf1,tf2;
- JButton btn1,btn2;
- Ch80()
- {
- fm = new JFrame("土地面積計算");
- lb1 = new JLabel("1坪=3.3058平方公尺",JLabel.CENTER);
- lb2 = new JLabel("輸入坪數:");
- tf1 = new JTextField();
- tf2 = new JTextField();
- btn1 = new JButton("確定");
- btn2 = new JButton("清除");
-
- lb1.setBounds(0, 10, 215, 30);
- lb2.setBounds(10, 40, 60, 40);
- tf1.setBounds(70,45,134,30);
- tf2.setBounds(10,85,195,40);
- btn1.setBounds(10,135,92,25);
- btn2.setBounds(112,135,92,25);
- fm.setBounds(100, 100, 220, 200);
-
- btn2.addActionListener(this);
- btn1.addActionListener(this);
- tf1.addActionListener(this);
- tf2.setEnabled(false);
-
- fm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
- fm.setVisible(true);
- fm.setResizable(true);
- fm.setLayout(null);
- fm.add(btn1);
- fm.add(btn2);
- fm.add(lb1);
- fm.add(lb2);
- fm.add(tf1);
- fm.add(tf2);
- }
-
- public static void main(String[] args)
- {
- Ch80 app=new Ch80();
- }
- public void actionPerformed(ActionEvent e)
- {
- if(e.getSource()==tf1 || e.getSource()==btn1)
- {
- double area = Double.parseDouble(tf1.getText())*3.3058;
- tf2.setText("面積為"+area+"公尺");
- }
- if(e.getSource()==btn2)
- {
- tf1.setText("");
- tf2.setText("");
- }
- }
- }
複製代碼 |