why do the two errors come out?

[li zhihui]

thanks for help me check the progarm:
import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;

public class ItemDemo extends Applet implements ItemListener
{
TextArea area=new TextArea(6,30);
String Uni[]={"Tsinghua University","Perking University","Fudan University",
"Nankai University","Tianjin University"};
Checkbox cb[]=new Checkbox[5];
Checkbox radio[]=new Checkbox[5];

public void init()
{
add(new Label("This is a Item example"));
add(area);
add(new Label("Please choose the University you like:"));
for (int i=0;i<5;i++);
{
cb[i]=new Checkbox(Uni[i]);
add(cb[i]);
cb[i].addItemListener(this);
}

CheckboxGroup cbGroup=new CheckboxGroup();
add(new Label("please choose the University you like most:"));
for(int i=0;i<5;i++)
{
radio[i]=new Checkbox(Uni[i],cbGroup,false);
add(radio[i]);
radio[i].addTtemListener(this);
}

public void itemStateChanged(ItemEvent e)
{
area.append("you have chosen "+e.getItem()+"\n");
}
}
}



D:\JAVA\JCreator LE\MyProjects\ItemDemo.java:34: illegal start of expression
public void itemStateChanged(ItemEvent e)
^
D:\JAVA\JCreator LE\MyProjects\ItemDemo.java:38: ';' expected
};
^
2 errors

[Joyce Lee]

Hi zhihui,

  
import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
 
public class ItemDemo extends Applet implements ItemListener {
    TextArea area=new TextArea(6,30);
    String Uni[] = {"Tsinghua University","Perking University","Fudan University",
            "Nankai University","Tianjin University"};
    Checkbox cb[]=new Checkbox[5];
    Checkbox radio[]=new Checkbox[5];
 
    public void init() {
        add(new Label("This is a Item example"));
        add(area);
        add(new Label("Please choose the University you like:"));
        
        for (int i=0; i<5; i++) { // semi-colon removed
            cb[i]=new Checkbox(Uni[i]);
            add(cb[i]);
            cb[i].addItemListener(this); 
        }
 
        CheckboxGroup cbGroup=new CheckboxGroup();
        add(new Label("please choose the University you like most:"));
        for(int i=0;i<5;i++) {
            radio[i] = new Checkbox(Uni[i],cbGroup,false);
            add(radio[i]);
            // typo error: radio[i].addTtemListener(this);
            radio[i].addItemListener(this); 
        }
    }    // braces corrected
        
    public void itemStateChanged(ItemEvent e) {
         area.append("you have chosen " + e.getItem() + "\n"); 
    }
}
 

Joyce
[ October 02, 2004: Message edited by: Joyce Lee ]

[Svend Rost]

Hi li,

Well.. those arn't the "real" errors.. you've put the } the wrong
place.

import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
 
public class JavaR1  extends Applet implements ItemListener
{
 TextArea area=new TextArea(6,30);
 String Uni[]={"Tsinghua University","Perking University","Fudan University",
 "Nankai University","Tianjin University"};
 Checkbox cb[]=new Checkbox[5];
 Checkbox radio[]=new Checkbox[5];
 
 public void init()
 {
 add(new Label("This is a Item example"));
 add(area);
 add(new Label("Please choose the University you like:"));
 for (int i=0;i<5;i++);
 {
 cb[i]=new Checkbox(Uni[i]);
 add(cb[i]);
 cb[i].addItemListener(this);
 }
 
 CheckboxGroup cbGroup=new CheckboxGroup();
 add(new Label("please choose the University you like most:"));
 for(int i=0;i<5;i++)
 {
 radio[i]=new Checkbox(Uni[i],cbGroup,false);
 add(radio[i]);
 radio[i].addTtemListener(this);
 }
 } // <-- new
  public void itemStateChanged(ItemEvent e)
  {
        area.append("you have chosen "+e.getItem()+"\n");
  }
 //}  
}

Btw. you get 5 erros when you compile the above code.. happy hacking

/Svend Rost