Java 1.2 How-To/JavaHowTo.iso/code/ch08.txt

Text File | 1998-12-14 | 15.3 KB | 731 lines

OneButton_Applet.java:

import javax.swing.*;
import java.awt.event.*;

import java.awt.*;

public class OneButton_Applet extends JApplet
{
    public void init()
    {
        JButton button1 = new JButton("Push Me");

        setBackground(Color.lightGray);
        getContentPane().add(button1,"Center");
    }//init()


}//OneButton_Applet








BorderLayout1.java:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class BorderLayout1 extends JPanel
{

//The constructor initializes the application

    public BorderLayout1()
    {
        JButton btnNorth;
        JButton btnSouth;
        JButton btnEast;
        JButton btnWest;
        JButton btnCenter;

        Font font1;

        font1 = new Font("Times-Roman",Font.BOLD,18);

        this.setLayout(new BorderLayout());

        btnNorth = new JButton("North");
        btnNorth.setFont(font1);
        add(btnNorth, "North");

        btnSouth = new JButton("South");
        btnSouth.setFont(font1);
        add(btnSouth, "South");

        btnEast = new JButton("East");
        btnEast.setFont(font1);
        add(btnEast, "East");

        btnWest = new JButton("West");
        btnWest.setFont(font1);
        add( btnWest, "West");

        btnCenter = new JButton("Center");
        btnCenter.setFont(font1);
        add(btnCenter, "Center");

    }//constructor

//main entry point for the application
public static void main(String s[])
   {
        JFrame f = new JFrame("Border Layout");
        BorderLayout1 panel = new BorderLayout1();

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel,"Center");

        f.setSize(400, 150);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());

    }//main
}//class


//This class handles the closing of the application
class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser






FlowLayout1.java:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class FlowLayout1 extends JPanel
{
    public FlowLayout1()
    {
        JButton btnOne;
        JButton btnTwo;
        JButton btnThree;
        JButton btnFour;

        this.setLayout(new FlowLayout(FlowLayout.LEFT));

        btnOne = new JButton("One");
        add(btnOne);

        btnTwo = new JButton("Two");
        add(btnTwo);

        btnThree = new JButton("Three");
        add(btnThree);

        btnFour = new JButton("Four");
        add(btnFour);

    }//constructor



    public static void main(String s[])
    {
        JFrame f = new JFrame("Flow Layout");
        FlowLayout1 panel = new FlowLayout1();

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel, "Center");

        f.setSize(400,100);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main
}//class


class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser








NoLayout1.java:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class NoLayout1 extends JPanel
{
    public NoLayout1()
    {
        JButton btnOne;
        JButton btnTwo;
        JButton btnThree;
        JButton btnFour;

        this.setLayout(null);

        btnOne = new JButton("One");
        btnOne.setBounds(0,0,100,100);
        add(btnOne);

        btnTwo = new JButton("Two");
        btnTwo.setBounds(100,0,100,50);
        add(btnTwo);

        btnThree = new JButton("Three");
        btnThree.setBounds(0,100,75,100);
        add(btnThree);

        btnFour = new JButton("Four");
        btnFour.setBounds(115,115,100,100);
        add(btnFour);

    }//constructor



    public static void main(String s[])
    {
        JFrame f = new JFrame("No Layout");
        NoLayout1 panel = new NoLayout1();

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel, "Center");

        f.setSize(250,250);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main
}//class


class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser








MouseLocation.java:

import javax.swing.*;
import java.awt.event.*;

import java.awt.*;

public class MouseLocation extends JPanel
{
    public MouseLocation()
    {
       setToolTipText("xxx");
       setBackground(Color.white);
    }//constructor

    public String getToolTipText(MouseEvent event)
    {

        int x = event.getX();
        int y = event.getY();
        String str = "(" + x + "," + y + ")";

        return str;
    }//getToolTipText


    public static void main(String s[])
    {
        JFrame f = new JFrame("MouseLocation Example");
        MouseLocation panel = new MouseLocation();

        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel,"Center");
        f.setSize(300,300);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());
    }//main

}//class MouseLocation

class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser








IconButtons.java:

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class IconButtons extends JPanel
{
    public IconButtons()
    {
        ImageIcon buttonImage = new ImageIcon("images/T1.gif");
        ImageIcon pressImage = new ImageIcon("images/T2.gif");
        ImageIcon selImage = new ImageIcon("images/T3.gif");
        ImageIcon disabledImage = new ImageIcon("images/T4.gif");
        ImageIcon rolloverImage = new ImageIcon("images/T4.gif");
        ImageIcon selrolloverImage = new ImageIcon("images/T3.gif");
        ImageIcon DOJImage = new ImageIcon("images/T2.gif");
        ImageIcon shapeImage = new ImageIcon("images/T1.gif");
        AbstractButton button1;
        AbstractButton button2;
        AbstractButton button3;
        Font font1;

        font1 = new Font("Serif", Font.PLAIN,16);
        setFont(font1);
        setDoubleBuffered(true);

        setLayout(new GridLayout(1,3,5,5));

        button1 = new JButton();
        button1.setIcon(buttonImage);
        button1.setPressedIcon(pressImage);
        button1.setRolloverIcon(rolloverImage);
        add(button1);

        button2 = new JButton();
        button2.setIcon(buttonImage);
        button2.setDisabledIcon(disabledImage);
        button2.setEnabled(false);
        add(button2);

        button3 = new JToggleButton();
        button3.setIcon(DOJImage);
        button3.setSelectedIcon(shapeImage);
        button3.setRolloverIcon(shapeImage);
        button3.setRolloverSelectedIcon(selrolloverImage);
        add(button3);

    }//constructor

   public static void main(String s[])
    {
        JFrame f = new JFrame("Icon Buttons ");
        IconButtons panel = new IconButtons();

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel, "Center");

        f.setSize(200,70);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main
}//IconButtons


class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser








Action1.java:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Action1 extends JPanel implements ActionListener
{
   public Action1()
   {
        JButton button1;
        JRadioButton radioButton1;
        JRadioButton radioButton2;
        ButtonGroup grp;


  //Buffer to reduce flicker
        setDoubleBuffered(true);

        button1 = new JButton("Button");
        button1.addActionListener(this);
        button1.setActionCommand("Button Activated");
        add(button1);

        grp = new ButtonGroup();

        radioButton1 = new JRadioButton("One");
        radioButton1.addActionListener(this);
        radioButton1.setActionCommand("One Activated");
        grp.add(radioButton1);
        add(radioButton1);

        radioButton2 = new JRadioButton("Two");
        radioButton2.addActionListener(this);
        radioButton2.setActionCommand("Two Activated");
        grp.add(radioButton2);
        add(radioButton2);

   }//constructor

   public void actionPerformed(ActionEvent e)
   {
        String cmd;
        Object source;

        source = e.getSource();
        cmd = e.getActionCommand();


        System.out.println("Action: "+cmd+"\n\tperformed by: "+source);
        System.out.println();

   }//actionPerformed

   public static void main(String s[])
    {
        JFrame f = new JFrame("Action1 ");
        Action1 panel = new Action1();

f.getContentPane().add(panel, "Center");

        f.setSize(200,100);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main

}//class Actions

class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser







List1.java:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class List1 extends JPanel
   implements ListSelectionListener
{
    JTextField actField;
    JList list;

    public List1()
    {
        String items[] = { "GA", "AL", "DC","NY",
                            "CA","UT","FL"};

        JPanel footer;
        JPanel tmp;

        setLayout( new BorderLayout());
        setBackground(Color.lightGray);

        //Turn on buffering

        setDoubleBuffered(true);
        list = new JList(items);
        list.addListSelectionListener(this);
        add(new JScrollPane(list), "Center");

        footer = new JPanel();
        footer.setLayout(new GridLayout(3,1,5,5));

        tmp = new JPanel();
        tmp.add(new JLabel("Sel values:"));
        actField = new JTextField(20);
        tmp.add(actField);

        footer.add(tmp);

        add(footer, "South");

    }//constructor

    public void valueChanged(ListSelectionEvent e)
    {
        int first, last;
        int i;
        String newVal = "";
        ListModel listData = list.getModel();
        Object selValues[];


        //Display the selected values

        selValues = list.getSelectedValues();

        if (selValues != null)
            last = selValues.length;
        else
            last = 0;

        newVal = "";

        for(i=0;i<last;i++)
        {
            if(i!=0) newVal+=" ";
            newVal += selValues[i].toString();
        }

        actField.setText(newVal);
   }

   public static void main(String s[])
   {
        JFrame f = new JFrame("List1");
        List1 panel = new List1();

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel, "Center");

        f.setSize(350,350);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main


}//class


class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser










Menu1.java:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class Menu1 extends JPanel
    implements ActionListener, MenuListener
{
    JTextField fldStatus;

    //Create the menu class
    public Menu1(JFrame frm)
    {
        JMenuBar bar = new JMenuBar();
        JMenu menu = new JMenu("Strategy");
        JMenuItem tmp;

        setBackground(Color.lightGray);
        setLayout(new BorderLayout());

        setDoubleBuffered(true);

        menu.addMenuListener(this);

        tmp = new JMenuItem("Lead");
        tmp.addActionListener(this);
        tmp.setActionCommand("Lead");
        menu.add(tmp);

        tmp = new JMenuItem("Follow");
        tmp.addActionListener(this);
        tmp.setActionCommand("Follow");
        menu.add(tmp);

        tmp = new JMenuItem("Resign");
        tmp.addActionListener(this);
        tmp.setActionCommand("Resign");
        menu.add(tmp);

        tmp = new JMenuItem("Quit");
        tmp.addActionListener(this);
        tmp.setActionCommand("Quit");
        menu.add(tmp);

        bar.add(menu);

        frm.setJMenuBar(bar);

        fldStatus = new JTextField(10);
add(fldStatus,"South");

    }//constructor

    public void actionPerformed(ActionEvent e)
    {
        String cmd;
        cmd = e.getActionCommand();

        if (cmd.equals("Lead"))
        {
            fldStatus.setText("Action: Lead");
        }
        if (cmd.equals("Follow"))
        {
            fldStatus.setText("Action: Follow");
        }
        if (cmd.equals("Resign"))
        {
            fldStatus.setText("Action: Resign");
        }
        if (cmd.equals("Quit"))
        {
            System.exit(0);
        }

    }

    public void menuSelected(MenuEvent e)
    {
        fldStatus.setText("Menu Selected");
    }

    public void menuDeselected(MenuEvent e)
    {
        fldStatus.setText("Menu Deselected");
    }

    public void menuCanceled(MenuEvent e)
    {
        fldStatus.setText("Menu Cancelled");
    }

   public static void main(String s[])
   {
        JFrame f = new JFrame("Menu1");
        Menu1 panel = new Menu1(f);

        f.setForeground(Color.black);
        f.setBackground(Color.lightGray);
        f.getContentPane().add(panel, "Center");

        f.setSize(300,200);
        f.setVisible(true);
        f.addWindowListener(new WindowCloser());


    }//main


}//class

//close down gracefully
class WindowCloser extends WindowAdapter
{
    public void windowClosing(WindowEvent e)
    {
        Window win = e.getWindow();
        win.setVisible(false);
        win.dispose();
        System.exit(0);
    }//windowClosing
}//class WindowCloser