java文件是java的源文件,这个在使用时是不必要的。class文件相当于java的执行文件,这个是必须的。
把java类运用到网页中,我知道的基本有以下几种方式。
1如果你做的计时器是一个applet,有界面的,那么把这个class放到和你的html或者jsp文档同目录中,然后在需要引用改applet的地方写下如下代码:
<APPLET code="c1_2class" width=150 height=100></APPLET>
这个方式最简单。
2要引用java类程序,我觉得你应该是使用jsp页面吧~,如果是jsp页面,jsp中有<jsp:useBean/>方法,你要看一下,这个不是一两句话能说清楚的。里面可以设置模式为applet,也可以直接把你的java applet类引入页面。
3注意,毕竟java和jsp还是有区别的。如果要做什么特效,用javascript我觉得比较方便。用java做的gui界面除了applet能引入网页,其他的好像不能,至少我没见过。
class文件在jsp技术中叫做bean,所以jsp中所有和bean有关的技术都可以使用特定的class文件。比如java bean的useBean,用struts等框架,用ejb(一种特殊的bean)等等,还可以用servlet,servlet可以直接使用一种特定类型的class文件,不过要用servlet做界面,悬。
如果真想用java相关技术做网页的话,还是先学学jsp吧。这是最简单的。
楼上说的很详细了,我说几点。
AWT,摇摆用于开发图形用户界面。
关于这个applet(Java小程序主要是用来开发的程序在网络上)
在Java刚出生时,主要是用于开发applet程序,主要用于AWT 。
摆动的基础上开发的GUI工具包AWT的新概念设计。
现实的情况是:
1。小应用程序现在已经很少使用。
2。例如,摆动主要用于开发Java桌面应用程序,也离不开从开发的java桌面程序AWT,AWT事件里面的类将被频繁使用。
你可以不学的小程序,但你不能帮助,但学习AWT和Swing
// My car shopjava
import javaawt;
import javaawtevent;
import javaxswing;
import javaxswingborder;
public class carshop extends JFrame
{
// JPanel to hold all pictures
private JPanel windowJPanel;
private String[] cars = { "","阿斯顿马丁", "美洲虎", "凯迪拉克",
"罗孚", "劳斯莱斯","别克"};
private int[] jiage = { 0,150000, 260000, 230000,
140000, 290000, 150000};
// JLabels for first snack shown
private JLabel oneJLabel;
private JLabel oneIconJLabel;
// JLabels for second snack shown
private JLabel twoJLabel;
private JLabel twoIconJLabel;
// JLabels for third snack shown
private JLabel threeJLabel;
private JLabel threeIconJLabel;
// JLabels for fourth snack shown
private JLabel fourJLabel;
private JLabel fourIconJLabel;
// JLabels for fifth snack shown
private JLabel fiveJLabel;
private JLabel fiveIconJLabel;
// JLabels for sixth snack shown
private JLabel sixJLabel;
private JLabel sixIconJLabel;
// JTextField for displaying snack price
private JTextArea displayJTextArea;
// JLabel and JTextField for user input
private JLabel inputJLabel;
private JComboBox selectCountryJComboBox;
private JLabel inputJLabel2;
private JTextField inputJTextField2;
// JButton to enter user input
private JButton enterJButton;
//JButton to clear the components
private JButton clearJButton;
// no-argument constructor
public carshop()
{
createUserInterface();
}
// create and position GUI components; register event handlers
private void createUserInterface()
{
// get content pane for attaching GUI components
Container contentPane = getContentPane();
// enable explicit positioning of GUI components
contentPanesetLayout( null );
// set up windowJPanel
windowJPanel = new JPanel();
windowJPanelsetBounds( 10, 20, 340, 200 );
windowJPanelsetBorder( new LineBorder( ColorBLACK ) );
windowJPanelsetLayout( null );
contentPaneadd( windowJPanel );
// set up oneIconJLabel
oneIconJLabel = new JLabel();
oneIconJLabelsetBounds( 10, 20, 100, 65 );
oneIconJLabelsetIcon( new ImageIcon( "images/阿斯顿马丁jpg" ) );
windowJPaneladd( oneIconJLabel );
// set up oneJLabel
oneJLabel = new JLabel();
oneJLabelsetBounds( 10, 60, 100, 70 );
oneJLabelsetText( "阿斯顿马丁" );
oneJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( oneJLabel );
// set up twoIconJLabel
twoIconJLabel = new JLabel();
twoIconJLabelsetBounds( 120, 20, 100, 65 );
twoIconJLabelsetIcon( new ImageIcon( "images/美洲虎jpg" ) );
windowJPaneladd( twoIconJLabel );
// set up twoJLabel
twoJLabel = new JLabel();
twoJLabelsetBounds( 110, 60, 100, 70 );
twoJLabelsetText( "美洲虎" );
twoJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( twoJLabel );
// set up threeIconJLabel
threeIconJLabel = new JLabel();
threeIconJLabelsetBounds( 230, 20, 100, 65 );
threeIconJLabelsetIcon( new ImageIcon(
"images/凯迪拉克jpg" ) );
windowJPaneladd( threeIconJLabel );
// set up threeJLabel
threeJLabel = new JLabel();
threeJLabelsetBounds( 230, 60, 100, 70);
threeJLabelsetText( "凯迪拉克" );
threeJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( threeJLabel );
// set up fourIconJLabel
fourIconJLabel = new JLabel();
fourIconJLabelsetBounds( 10, 100, 100, 65 );
fourIconJLabelsetIcon( new ImageIcon( "images/罗孚jpg" ) );
windowJPaneladd( fourIconJLabel );
// set up fourJLabel
fourJLabel = new JLabel();
fourJLabelsetBounds( 10, 150, 50, 70 );
fourJLabelsetText( "罗孚" );
fourJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( fourJLabel );
// set up fiveIconJLabel
fiveIconJLabel = new JLabel();
fiveIconJLabelsetBounds( 120, 100, 100, 65 );
fiveIconJLabelsetIcon( new ImageIcon(
"images/劳斯莱斯jpg" ) );
windowJPaneladd( fiveIconJLabel );
// set up fiveJLabel
fiveJLabel = new JLabel();
fiveJLabelsetBounds( 110, 150, 100, 70 );
fiveJLabelsetText( "劳斯莱斯" );
fiveJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( fiveJLabel );
// set up sixIconJLabel
sixIconJLabel = new JLabel();
sixIconJLabelsetBounds( 230, 100, 100, 65 );
sixIconJLabelsetIcon( new ImageIcon( "images/别克jpg" ) );
windowJPaneladd( sixIconJLabel );
// set up sixJLabel
sixJLabel = new JLabel();
sixJLabelsetBounds( 230, 150, 100, 70 );
sixJLabelsetText( "别克" );
sixJLabelsetHorizontalAlignment( JLabelCENTER );
windowJPaneladd( sixJLabel );
// set up enterJButton
enterJButton = new JButton();
enterJButtonsetBounds( 390, 160, 135, 30 );
enterJButtonsetText( "Enter" );
contentPaneadd( enterJButton );
enterJButtonaddActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when enterJButton is clicked
public void actionPerformed( ActionEvent event )
{
enterJButtonActionPerformed( event );
}
} // end anonymous inner class
); // end call to addActionListener
// set up clearJButton
clearJButton = new JButton();
clearJButtonsetBounds( 390, 200, 135, 30 );
clearJButtonsetText( "Clear" );
contentPaneadd( clearJButton );
// set up inputJLabel
inputJLabel = new JLabel();
inputJLabelsetBounds( 390, 25, 135, 25 );
inputJLabelsetText( "Please make selection:" );
contentPaneadd( inputJLabel );
selectCountryJComboBox = new JComboBox( cars );
selectCountryJComboBoxsetBounds( 390, 50, 135, 21 );
selectCountryJComboBoxsetMaximumRowCount( 3 );
contentPaneadd( selectCountryJComboBox );
// set up inputJTextField
inputJLabel2 = new JLabel();
inputJLabel2setBounds( 390, 80, 150, 20 );
inputJLabel2setText( "Input the Numble:" );
contentPaneadd( inputJLabel2 );
// set up inputJTextField
inputJTextField2 = new JTextField();
inputJTextField2setBounds( 390, 100, 135, 25 );
inputJTextField2setHorizontalAlignment( JTextFieldRIGHT );
contentPaneadd( inputJTextField2 );
clearJButtonaddActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when clearJButton is clicked
public void actionPerformed( ActionEvent event )
{
clearJButtonActionPerformed( event );
}
} // end anonymous inner class
);
// set up displayJTextField
displayJTextArea = new JTextArea();
displayJTextAreasetBounds( 10, 237,515, 70 );
displayJTextAreasetEditable( false );
contentPaneadd( displayJTextArea );
// set properties of application's window
setTitle( "My car Shop" ); // set title bar string
setSize( 550, 360 ); // set window size
setVisible( true ); // display window
} // end method createUserInterface
private void clearJButtonActionPerformed( ActionEvent event )
{
// clear the JTextFields
inputJTextField2setText( "" );
displayJTextAreasetText("");
} // end method clearJButtonActionPerformed
private void enterJButtonActionPerformed( ActionEvent event )
{
double z;
double c;
int x;
int y;
x=selectCountryJComboBoxgetSelectedIndex();
y=IntegerparseInt(inputJTextField2getText());
double discountRate;
int amount = IntegerparseInt( inputJTextField2getText());
switch (amount/5)
{
case 0:
discountRate = 0;
break;
case 1:
discountRate = 1;
break;
case 2:
discountRate = 2;
break;
case 3:
discountRate = 3;
break;
default:
discountRate = 4;
} // end switch statement
c=1-discountRate/100;
z=jiage[x]yc;
displayJTextAreaappend("你选择的是:"+cars[x]+";"+
"它的单价是:"+jiage[x]+";" +"你购买该产品的数量是:"+y+"," +"\n"+"该数量的折扣是:"
+discountRate + " %"+";"+"本次消费的总价格是:"+z+"元"+"!"+"\n");
}
public static void main( String args[] )
{
carshop application = new carshop();
applicationsetDefaultCloseOperation( JFrameEXIT_ON_CLOSE );
} // end method main
} // end class carshop
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