MVC小程序 软件体系结构

package view; import interf.NumChange; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.border.*; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import attribute.CirAttribute; import model.CircleModel; import java.util.Observer; import java.util.Observable; public class InputView extends JPanel implements Observer { CircleModel model; private NumChange chg; JTextField jtfRadii = new JTextField(); JTextField jtfGirth = new JTextField(); JTextField jtfArea = new JTextField(); JLabel jlbRadii = new JLabel("半径"); JLabel jlbGirth = new JLabel("周长"); JLabel jlbArea = new JLabel("面积"); public InputView() { } public InputView(CircleModel model,NumChange change) { try { this.model = model; this.chg=change; jbInit(); } catch (Exception e) { e.printStackTrace(); } } public void jbInit() throws Exception { this.setLayout(null); jlbRadii.setBounds(new Rectangle(50, 60, 50, 20)); this.add(jlbRadii); jtfRadii.setBounds(new Rectangle(80, 60, 50, 20)); this.add(jtfRadii); jlbGirth.setBounds(new Rectangle(50, 90, 50, 20)); this.add(jlbGirth); jtfGirth.setBounds(new Rectangle(80, 90, 50, 20)); this.add(jtfGirth); jlbArea.setBounds(new Rectangle(50, 120, 50, 20)); this.add(jlbArea); jtfArea.setBounds(new Rectangle(80, 120, 50, 20)); this.add(jtfArea); jtfRadii.setText("0"); jtfGirth.setText("0.0"); jtfArea.setText("0.0"); this.setBorder(new TitledBorder(BorderFactory.createLineBorder( Color.black, 1))); jtfRadii.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { adiiInput_ChangeEvent(e); } }); } public void adiiInput_ChangeEvent(ActionEvent e){ int addi=0; try { addi= Integer.parseInt(jtfRadii.getText()); if (addi>100||addi<0){ JOptionPane.showMessageDialog(this,"输入整数必须在0-100之间!"); addi=0; } }catch (NumberFormatException ex){ JOptionPane.showMessageDialog(this,"请输入整数!"); } chg.numChanged(addi); } public void setText(){ if (model == null){ System.out.println("model is NULL"); return; } CirAttribute cir =new CirAttribute(); cir= model.getdata(); if (cir==null){ return; } jtfRadii.setText(cir.radii+""); jtfGirth.setText(cir.girth+""); jtfArea.setText(cir.area+""); } public void update(Observable o, Object arg) { this.model = (CircleModel) o; setText(); } }