我有一个奇怪的问题。我在家里创建了一些代码，它编译得很好，没有错误。现在我尝试在学校编译相同的代码，并且我得到了字符串 d 的不兼容类型错误：S 我顺便使用了蓝色 J。
代码：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**
* @author (Andrew Napier, Sikander Singh)
* @version (December 18th, 2012)
*/
public class MonthlyData extends JFrame
{
private JLabel title, stitle, l1,l2,l3,l4,l5,l6,l7,l8,l9,l10,l11,l12,l13,l14;
private JLabel Usage,Estimated,solu1,solu2,total2;
private JLabel l15,l16,l17,l18,l19,l20,l21,l22,l23,l24,l25,l26,l27,l28,l29;
private JPanel panel1, panel2, panel3, panel4, panel5, panel6, panel7;
String[] deviceStrings = { "Device", "Blackberry", "Other", "Internetstick"};
String[] date = { "Day", "Week", "Month"};
public double email2 = 0;
public double email1;
public double web2 = 0;
public double IM2 = 0;
public double video2 = 0;
public double song2 = 0;
public double app2 = 0;
static final int email50 = 50;
static final int email100 = 100;
static final int email150 = 150;
static final int email200 = 200;
static final int email250 = 250;
static final int email300 = 300;
public JSlider Email = new JSlider(0,300,0);
public JSlider Web = new JSlider(0,500,0);
public JSlider IM = new JSlider(0,500,0);
public JSlider Video = new JSlider(0,300,0);
public JSlider Song = new JSlider(0,200,0);
public JSlider App_G = new JSlider(0,100,0);
public String currentdate;
public double emailvalue, webvalue,IMvalue, videovalue, songvalue, appvalue;
public double webmb, immb, videomb, songmb,appmb,emailmb;
public MonthlyData ()
{
super ("MonthlyData");
setSize (1000,1100);
////////////////////////////////////////////////////// panel1
panel1 = new JPanel ();
panel1.setLayout (new GridLayout(1,1));
panel1.setVisible(true);
panel1.setBackground (Color.black);
title = new JLabel (" WANNA KNOW HOW MUCH DATA YOU NEED?",JLabel.LEFT);
title.setForeground(Color.white);
title.setFont (new Font("Times New Roman",Font.BOLD,25));
l1 = new JLabel ("");
l2 = new JLabel ("");
/////////////////////////////////////////////// panel2
panel2 = new JPanel ();
panel2.setLayout (new GridLayout(1,1));
panel2.setVisible(true);
panel2.setBackground (Color.gray);
stitle = new JLabel ("PICK A PHONE OR INTERNET STICK AND THEN DRAG .",JLabel.LEFT);
stitle.setForeground(Color.black);
stitle.setFont (new Font("Times New Roman",Font.BOLD,14));
//////////////////////////////////////////////// panel3
panel3 = new JPanel ();
panel3.setLayout (new FlowLayout());
panel3.setVisible(true);
panel3.setBackground (Color.white);
l3 = new JLabel ("Select Your Device:",JLabel.RIGHT);
l3.setForeground(Color.red);
l4 = new JLabel ("Tell us how much of what's listed here you think you'll use:");
///////////////////////////////////////////////// panel4
panel4 = new JPanel ();
panel4.setLayout (new GridLayout(6,7));
panel4.setVisible(true);
panel4.setBackground (Color.white);
l5 = new JLabel ("Email");
l6 = new JLabel ("WebPage");
l7 = new JLabel ("Instant Message");
l8 = new JLabel ("Streaming Video");
l9 = new JLabel ("Song");
l10 = new JLabel ("Application or Game");
l11 = new JLabel (""+" Emails");
l12 = new JLabel (" MB");
l15 = new JLabel (" MB");
l18 = new JLabel (" MB");
l21 = new JLabel (" MB");
l24 = new JLabel (" MB");
l27 = new JLabel (" MB");
final JComboBox devicelist = new JComboBox (deviceStrings);
devicelist.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
**String d = (String) devicelist.getSelectedItem();**
switch (d) {//check for a match
case "Blackberry":
emailmb = 0.002;
webmb = 0.07;
immb = 0.005;
videomb = 1;
songmb = 4;
appmb = 0.44;
l12.setText(emailmb + " MB");
l15.setText(webmb + " MB");
l18.setText(immb + " MB");
l21.setText(videomb + " MB");
l24.setText(songmb + " MB");
l27.setText(appmb + " MB");
break;
case "Other":
emailmb = 0.02;
webmb = 0.17;
immb = 0.03;
videomb = 1;
songmb = 4;
appmb = 4;
l12.setText(emailmb + " MB");
l15.setText(webmb + " MB");
l18.setText(immb + " MB");
l21.setText(videomb + " MB");
l24.setText(songmb + " MB");
l27.setText(appmb + " MB");
break;
case "Internetstick":
emailmb = 0.04;
webmb = 0.2;
immb = 0.002;
videomb = 4;
songmb = 5;
appmb = 30;
l12.setText(emailmb + " MB");
l15.setText(webmb + " MB");
l18.setText(immb + " MB");
l21.setText(videomb + " MB");
l24.setText(songmb + " MB");
l27.setText(appmb + " MB");
break;
}
}
});
devicelist.setSelectedItem(devicelist[0]);
final JComboBox date1 = new JComboBox (date);
date1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s = (String) date1.getSelectedItem();//get the selected item
switch (s) {//check for a match
case "Day":
emailvalue = 30;
break;
case "Week":
emailvalue = 4;
break;
case "Month":
emailvalue = 1;
break;
}
}
});
date1.setSelectedItem(date[0]);
final JComboBox date2 = new JComboBox (date);
date2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s2 = (String) date2.getSelectedItem();//get the selected item
switch (s2) {//check for a match
case "Day":
webvalue = 30;
break;
case "Week":
webvalue = 4;
break;
case "Month":
webvalue = 1;
break;
}
}
});
date2.setSelectedItem(date[0]);
final JComboBox date3 = new JComboBox (date);
date3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s3 = (String) date3.getSelectedItem();//get the selected item
switch (s3) {//check for a match
case "Day":
IMvalue = 30;
break;
case "Week":
IMvalue = 4;
break;
case "Month":
IMvalue = 1;
break;
}
}
});
date3.setSelectedItem(date[0]);
final JComboBox date4 = new JComboBox (date);
date4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s4 = (String) date4.getSelectedItem();//get the selected item
switch (s4) {//check for a match
case "Day":
videovalue = 30;
break;
case "Week":
videovalue = 4;
break;
case "Month":
videovalue = 1;
break;
}
}
});
date4.setSelectedItem(date[0]);
final JComboBox date5 = new JComboBox (date);
date5.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s5 = (String) date5.getSelectedItem();//get the selected item
switch (s5) {//check for a match
case "Day":
songvalue = 30;
break;
case "Week":
songvalue = 4;
break;
case "Month":
songvalue = 1;
break;
}
}
});
date5.setSelectedItem(date[0]);
final JComboBox date6 = new JComboBox (date);
date6.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String s6 = (String) date6.getSelectedItem();//get the selected item
switch (s6) {//check for a match
case "Day":
appvalue = 30;
break;
case "Week":
appvalue = 4;
break;
case "Month":
appvalue = 1;
break;
}
}
});
date6.setSelectedItem(date[0]);
l13 = new JLabel (""+email2+" MB");
double web1 = 0;
l14 = new JLabel (""+web1+" WebPages");
l16 = new JLabel (""+web2+" MB");
double IM1 = 0;
l17 = new JLabel (""+IM1+" IMs");
l19 = new JLabel (""+IM2+" MB");
double video1 = 0;
l20 = new JLabel (""+video1+" Minutes");
l22 = new JLabel (""+video2+" MB");
double song1 = 0;
l23 = new JLabel (""+song1+" MP3's");
l25 = new JLabel (""+song2+" MB");
double app1 = 0;
l26 = new JLabel (""+app1+" App/Games");
l28 = new JLabel (""+app2+" MB");
//////////////////////////////////////////////// panel5
panel5 = new JPanel ();
panel5.setLayout (new GridLayout(1,1));
panel5.setVisible(true);
panel5.setBackground (Color.white);
solu1 = new JLabel ("WE THINK YOUR MONTHLY DATA USAGE WILL BE:");
solu1.setForeground (Color.red);
solu1.setFont (new Font("Times New Roman",Font.BOLD,20));
double total = 0;
total2 = new JLabel ((email2 + web2 + IM2 + video2 + song2 + app2) + "MB");
total2.setForeground (Color.red);
total2.setFont (new Font("Times New Roman",Font.BOLD,20));
/////////////////////////////////////////// panel6
panel6 = new JPanel ();
panel6.setLayout (new GridLayout (1,1));
panel6.setVisible (true);
panel6.setBackground (Color.white);
Usage = new JLabel ("Usage per unit");
Usage.setForeground (Color.red);
Estimated = new JLabel (" Estimated total");
Estimated.setForeground (Color.red);
////////////////////////////////////////////// panel7
panel7 = new JPanel ();
panel7.setLayout (new GridLayout (1,1));
panel7.setVisible (true);
panel7.setBackground (Color.white);
solu2 = new JLabel ("Data usage varies by device and other factors and the");
solu2.setForeground (Color.black);
/////////////////////////////////////////////////// Implements
Container container = getContentPane ();
container.setLayout (null); //changed
container.setBackground (Color.white);
container.add (panel1).setBounds (0,0,1000,120); //panel1
panel1.add (title).setSize(500,500);
container.add (panel2).setBounds (0,100,1000,120); //panel2
panel2.add (stitle);
container.add (panel3).setBounds (0,220,1000,100); //panel3
panel3.add (l3);
panel3.add (devicelist);
panel3.add (l4);
container.add (panel4).setBounds (0,340,1000,150); //panel4
Email.addChangeListener(new SliderHandler());
Web.addChangeListener(new SliderHandler());
IM.addChangeListener(new SliderHandler());
Video.addChangeListener(new SliderHandler());
Song.addChangeListener(new SliderHandler());
App_G.addChangeListener(new SliderHandler());
panel4.add (l5);
panel4.add (Email);
panel4.add (l11);
panel4.add (date1);
panel4.add (l12);
panel4.add (l13);
panel4.add (l6);
panel4.add (Web);
panel4.add (l14);
panel4.add (date2);
panel4.add (l15);
panel4.add (l16);
panel4.add (l7);
panel4.add (IM);
panel4.add (l17);
panel4.add (date3);
panel4.add (l18);
panel4.add (l19);
panel4.add (l8);
panel4.add (Video);
panel4.add (l20);
panel4.add (date4);
panel4.add (l21);
panel4.add (l22);
panel4.add (l9);
panel4.add (Song);
panel4.add (l23);
panel4.add (date5);
panel4.add (l24);
panel4.add (l25);
panel4.add (l10);
panel4.add (App_G);
panel4.add (l26);
panel4.add (date6);
panel4.add (l27);
panel4.add (l28);
container.add (panel5).setBounds (210,540,1000,50); // panel5
panel5.add (solu1);
panel5.add (total2);
container.add (panel6).setBounds (670,220,200,220); // panel6
panel6.add (Usage);
panel6.add (Estimated);
container.add (panel7).setBounds (210,580,530,50); // panel7
panel7.add (solu2);
Email.setOpaque(false);
Web.setOpaque(false);
IM.setOpaque(false);
Video.setOpaque(false);
Song.setOpaque(false);
App_G.setOpaque(false);
setVisible (true);
}
public static void main (String[] args)
{
MonthlyData application = new MonthlyData ();
}
public class SliderHandler implements ChangeListener
{
public void stateChanged(ChangeEvent e)
{
if (e.getSource().equals(Email))
{
l11.setText(""+Email.getValue());
email2= (Email.getValue() * emailmb)*emailvalue;
l13.setText(email2 + "MB");
}
if (e.getSource().equals(Web))
{
l14.setText(""+Web.getValue());
web2 = (Web.getValue() * webmb) * webvalue;
l16.setText(web2 + "MB");
}
if (e.getSource().equals(IM))
{
l17.setText(""+IM.getValue());
IM2 = (IM.getValue() * immb) * IMvalue;
l19.setText(IM2 + "MB");
}
if (e.getSource().equals(Video))
{
l20.setText(""+Video.getValue());
video2 = (Video.getValue() * videomb) * videovalue;
l22.setText(video2 + "MB");
}
if (e.getSource().equals(Song))
{
l23.setText(""+Song.getValue());
song2 = (Song.getValue() * songmb) * songvalue;
l25.setText(song2 + "MB");
}
if (e.getSource().equals(App_G))
{
l26.setText(""+App_G.getValue());
app2 = (App_G.getValue() * appmb) * appvalue;
l28.setText(app2 + "MB");
}
}
}
public void paint (Graphics g)
{
super.paint(g);
}
}