【没有数据库的Java Swing中的在线考试项目】在此项目中, 有10个问题要玩。用户可以在结果时将任何问题加为书签以供重新考虑。
我们在这里使用java数组存储问题, 选项和答案, 而不是数据库。你可以使用收集框架或数据库代替数组。
/*Online Java Paper Test*/import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class OnlineTest extends JFrame implements ActionListener
{
JLabel l;
JRadioButton jb[]=new JRadioButton[5];
JButton b1, b2;
ButtonGroup bg;
int count=0, current=0, x=1, y=1, now=0;
int m[]=new int[10];
OnlineTest(String s)
{
super(s);
l=new JLabel();
add(l);
bg=new ButtonGroup();
for(int i=0;
i<
5;
i++)
{
jb[i]=new JRadioButton();
add(jb[i]);
bg.add(jb[i]);
}
b1=new JButton("Next");
b2=new JButton("Bookmark");
b1.addActionListener(this);
b2.addActionListener(this);
add(b1);
add(b2);
set();
l.setBounds(30, 40, 450, 20);
jb[0].setBounds(50, 80, 100, 20);
jb[1].setBounds(50, 110, 100, 20);
jb[2].setBounds(50, 140, 100, 20);
jb[3].setBounds(50, 170, 100, 20);
b1.setBounds(100, 240, 100, 30);
b2.setBounds(270, 240, 100, 30);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(null);
setLocation(250, 100);
setVisible(true);
setSize(600, 350);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)
{
if(check())
count=count+1;
current++;
set();
if(current==9)
{
b1.setEnabled(false);
b2.setText("Result");
}
}
if(e.getActionCommand().equals("Bookmark"))
{
JButton bk=new JButton("Bookmark"+x);
bk.setBounds(480, 20+30*x, 100, 30);
add(bk);
bk.addActionListener(this);
m[x]=current;
x++;
current++;
set();
if(current==9)
b2.setText("Result");
setVisible(false);
setVisible(true);
}
for(int i=0, y=1;
i<
x;
i++, y++)
{
if(e.getActionCommand().equals("Bookmark"+y))
{
if(check())
count=count+1;
now=current;
current=m[y];
set();
((JButton)e.getSource()).setEnabled(false);
current=now;
}
}
if(e.getActionCommand().equals("Result"))
{
if(check())
count=count+1;
current++;
//System.out.println("correct ans="+count);
JOptionPane.showMessageDialog(this, "correct ans="+count);
System.exit(0);
}
}
void set()
{
jb[4].setSelected(true);
if(current==0)
{
l.setText("Que1: Which one among these is not a primitive datatype?");
jb[0].setText("int");
jb[1].setText("Float");
jb[2].setText("boolean");
jb[3].setText("char");
}
if(current==1)
{
l.setText("Que2: Which class is available to all the class automatically?");
jb[0].setText("Swing");
jb[1].setText("Applet");
jb[2].setText("Object");
jb[3].setText("ActionEvent");
}
if(current==2)
{
l.setText("Que3: Which package is directly available to our class without importing it?");
jb[0].setText("swing");
jb[1].setText("applet");
jb[2].setText("net");
jb[3].setText("lang");
}
if(current==3)
{
l.setText("Que4: String class is defined in which package?");
jb[0].setText("lang");
jb[1].setText("Swing");
jb[2].setText("Applet");
jb[3].setText("awt");
}
if(current==4)
{
l.setText("Que5: Which institute is best for java coaching?");
jb[0].setText("Utek");
jb[1].setText("Aptech");
jb[2].setText("SSS IT");
jb[3].setText("jtek");
}
if(current==5)
{
l.setText("Que6: Which one among these is not a keyword?");
jb[0].setText("class");
jb[1].setText("int");
jb[2].setText("get");
jb[3].setText("if");
}
if(current==6)
{
l.setText("Que7: Which one among these is not a class? ");
jb[0].setText("Swing");
jb[1].setText("Actionperformed");
jb[2].setText("ActionEvent");
jb[3].setText("Button");
}
if(current==7)
{
l.setText("Que8: which one among these is not a function of Object class?");
jb[0].setText("toString");
jb[1].setText("finalize");
jb[2].setText("equals");
jb[3].setText("getDocumentBase");
}
if(current==8)
{
l.setText("Que9: which function is not present in Applet class?");
jb[0].setText("init");
jb[1].setText("main");
jb[2].setText("start");
jb[3].setText("destroy");
}
if(current==9)
{
l.setText("Que10: Which one among these is not a valid component?");
jb[0].setText("JButton");
jb[1].setText("JList");
jb[2].setText("JButtonGroup");
jb[3].setText("JTextArea");
}
l.setBounds(30, 40, 450, 20);
for(int i=0, j=0;
i<
=90;
i+=30, j++)
jb[j].setBounds(50, 80+i, 200, 20);
}
boolean check()
{
if(current==0)
return(jb[1].isSelected());
if(current==1)
return(jb[2].isSelected());
if(current==2)
return(jb[3].isSelected());
if(current==3)
return(jb[0].isSelected());
if(current==4)
return(jb[2].isSelected());
if(current==5)
return(jb[2].isSelected());
if(current==6)
return(jb[1].isSelected());
if(current==7)
return(jb[3].isSelected());
if(current==8)
return(jb[1].isSelected());
if(current==9)
return(jb[2].isSelected());
return false;
}
public static void main(String s[])
{
new OnlineTest("Online Test Of Java");
}
}输出量
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