i have this code in java...
my first combobox when u choose letter a will be correct...

but how will apply in the other combobox that when u choose it...

the letter b will be the correct answer??

plzz help me...



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

public class CaseStudyFirst implements ItemListener{

JComboBox choice1, choice2;
int score;

public CaseStudyFirst(){

JFrame f = new JFrame();
f.setSize(500, 500);

f.setLayout(new GridBagLayout());
GridBagConstraints x = new GridBagConstraints();
Container con = f.getContentPane();

// JLabel 2 be put here....

JLabel label1 = new JLabel("Name: ");
x.fill = GridBagConstraints.HORIZONTAL;
x.insets = new Insets(3, 2, 2, 3);
x.gridx = 0;
x.gridy = 0;
con.add(label1, x);

JLabel label2 = new JLabel("Section: ");
x.fill = GridBagConstraints.HORIZONTAL;
x.weighty = 0.0;
x.gridx = 0;
x.gridy = 1;
con.add(label2, x);

JLabel question1 = new JLabel("Questions: ");
x.fill = GridBagConstraints.HORIZONTAL;
x.gridx = 0;
x.gridy = 2;
con.add(question1, x);


//JTextField to be put here...

JTextField TextField1 = new JTextField();
x.gridx = 1;
x.gridy = 0;
x.ipadx = 100;
x.ipady = 1;
x.gridwidth = 5;
TextField1.setToolTipText("Enter Your Name Here: ");
con.add(TextField1, x);

JTextField TextField2 = new JTextField();
x.gridx = 1;
x.gridy = 1;
x.ipadx = 100;
x.ipady = 1;
x.gridwidth = 5;
TextField2.setToolTipText("Enter Your Section Here: ");
con.add(TextField2, x);

choice1 = new JComboBox(new Object[]{"a","b","c","d"});
x.gridx = 0;
x.gridy = 3;
con.add(choice1, x);
choice1.addItemListener(this);

choice2 = new JComboBox(new Object[]{"a","b","c","d"});
x.gridx = 0;
x.gridy = 5;
con.add(choice2, x);
choice2.addItemListener(this);

f.pack();
f.setVisible(true);

}
public void itemStateChanged(ItemEvent e) {

if(e.getSource() == choice1) {
if(choice1.getSelectedItem().equals("a")) {
System.out.println("CORRECT!"); }
else {
System.out.println("WRONG!");
}
choice1.setEnabled(false);
}
}
)


public static void main(String[] args) {
new CaseStudyFirst();

}
}

There are two ways how to get about this problem

1. One general listener for associated components like now in your case ItemListern

2.Each components handles his own events, in this case you can remove "implements ItemListener" from start of your class

Preferences in usage are on the programmer. For long time I was going with first option, but now I turned to second as it is easier to find in the code and it does avoid complication of if/else if/else statements inside (one can get easily lost in that web)

PS: You are not closing frame properly you need to add this to your JFrame f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); let say after layout declaration
PS2: Please start using code tags as [code]YOUR CODE HERE[/code] or [code=Java]YOUR CODE HERE[/code]

Hello,

Heres another way to do it.