vacationdisplay.java

源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例子程序

import java.awt.*;
import java.awt.event.*;
import java.util.*;

//swing classes
import javax.swing.text.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;

public class VacationDisplay extends JxFrame
implements ActionListener {
    JawtList empList;
    JTextField total, btotal;
    JButton Vac;
    Employee[] employees;
//-----------------------------------------
    public VacationDisplay() {
        super("Vacation Display");
        JPanel jp = new JPanel();
        getContentPane().add(jp);
        jp.setLayout(new GridLayout(1,2));
        empList = new JawtList(10);
        jp.add(empList);

        createEmployees();

        Box box =new Box(BoxLayout.Y_AXIS);
        jp.add(box);
        total = new JTextField(5);
        total.setHorizontalAlignment(JTextField.CENTER);
        box.add(total);
        box.add(Box.createVerticalStrut(10));
        btotal = new JTextField(5);
        btotal.setHorizontalAlignment(JTextField.CENTER);
        box.add(btotal);
        box.add(Box.createVerticalStrut(10));
        Vac = new JButton("Vacations");
        box.add(Vac);
        box.add(Box.createVerticalStrut(50));
        Vac.addActionListener(this);
        setSize(300,200); 
        setVisible(true); 
        total.setText("  ");
        total.setBackground(Color.white);

    }
    //-----------------------------------------
    public void createEmployees() {
        employees = new Employee[7];
        int i = 0;
        employees[i++] =new Employee("Susan Bear",  55000, 12, 1);
        employees[i++] = new Employee("Adam Gehr",  150000, 9, 0);
        employees[i++] = new Employee("Fred Harris",  50000, 15, 2);
        employees[i++] = new Employee("David Oakley",  57000, 12, 2);
        employees[i++] = new Employee("Larry Thomas",  100000, 20, 6);
        Boss b = new Boss("Leslie Susi", 175000, 16,4);
        b.setBonusDays(12);
        Boss b1 = new Boss("Laurence Byerly", 35000, 17,6);
        b1.setBonusDays(17);
        employees[i++] = b;
        employees[i++] = b1;

        for ( i = 0; i < employees.length; i++) {
            empList.add(employees[i].getName());
        }
    }
    //----------------------------------------- 
    public void actionPerformed(ActionEvent e) {
        VacationVisitor vac = new VacationVisitor();
        bVacationVisitor bvac = new bVacationVisitor();
        for (int i = 0; i < employees.length; i++) {
            employees[i].accept(vac);
            employees[i].accept(bvac);
        }
        total.setText(new Integer(vac.getTotalDays()).toString());
        btotal.setText(new Integer(bvac.getTotalDays()).toString());
    }
    //-----------------------------------------
    static public void main(String argv[]) {
        new VacationDisplay();
    }
}