Java Program to Create Check Boxes and Radio Buttons

This is a Java Program to Create Check Boxes and Radio Buttons and Display the Selected in a Text Area

Problem Description

We have to write a program in Java such that it creates 3 Radio Buttons and 3 Check Boxes and displays the selected using two labels.

Expected Input and Output

To display the Radio Buttons and Check Boxes selected, we have the following sets of input and output.

1. When Radio Buttons are Selected:

Suppose there are 3 Radio Buttons namely Button 1, Button 2 and Button 3
If we select all 3 Radio Buttons,
then the expected output is "Button(s) Selected : Button 1, Button 2, Button 3"

2. When Check Boxes are Selected:

Suppose there are 3 Radio Buttons & 3 Check Boxes
Button 1, Button 2 and Button 3
Checkbox 1, Checkbox 2 and Checkbox 3
If we select all 3 Radio Buttons & 3 Check Boxes,
then the expected output is 
"Button(s) Selected : Button 1, Button 2, Button 3"
"CheckBox(s) Selected : Checkbox 1, Checkbox 2, Checkbox 3"

3. When Radio Buttons are De-Selected:

Suppose there are 3 Radio Buttons & 3 Check Boxes
Button 1, Button 2 and Button 3
Checkbox 1, Checkbox 2 and Checkbox 3
If we select 2 Radio Buttons (Button 1 & Button 3) & 3 Check Boxes,
then the expected output is 
"Button(s) Selected : Button 1, Button 3"
"CheckBox(s) Selected : Checkbox 1, Checkbox 2, Checkbox 3"

4. When Check Boxes are De-Selected:

Suppose there are 3 Radio Buttons & 3 Check Boxes
Button 1, Button 2 and Button 3
Checkbox 1, Checkbox 2 and Checkbox 3
If we select 2 Radio Buttons (Button 1 & Button 3) & 1 Check Box (Checkbox 2),
then the expected output is 
"Button(s) Selected : Button 1, Button 3"
"CheckBox(s) Selected : Checkbox 2"

Problem Solution

1. Create a frame with three Radio Buttons and three Check Boxes respectively.
2. Add ActionListener with the Radio Buttons and ItemListener with the Check Boxes.
3. Display the list of button(s) selected in label text1.
4. Display the list of CheckBox(s) selected in label text2.

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Program/Source Code

Here is source code of the Java Program to display the Radio Buttons and Check Boxes selected. The program is successfully compiled and tested using javac compiler on Fedora 30. The program output is also shown below.

/*Java Program to Display Radio Buttons and Check Boxes selected*/

```
import javax.swing.*;
```
```
import java.awt.*;
```
```
import java.awt.event.*;
```

class Button_Checkbox implements ActionListener,ItemListener

```
{
```
```
    static JFrame frame;
```
```
    static JLabel text1,text2;
```
```
    static JCheckBox[] checkbox;
```
```
    static JRadioButton[] button;
```
```
    //Driver function
```

    public static void main(String args[])

```
    {
```
```
        //Create a frame
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	frame=new JFrame("Buttons & Checkboxes");

```
	frame.setSize(600,600);
```
```
	frame.setLayout(null);
```

	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	frame.getContentPane().setBackground(Color.white);

```
	//Create the text fields
```
```
	text1=new JLabel("");
```
```
	text1.setBounds(0,450,600,50);
```
```
	frame.add(text1);
```
```
	text2=new JLabel("");
```
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	text2.setBounds(0,500,600,50);
```
```
	frame.add(text2);
```
```
	//Create an object
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	Button_Checkbox obj=new Button_Checkbox();

```
	//Create 3 buttons
```
```
	button=new JRadioButton[3];
```
```
	for(int i=0;i<3;i++)
```
```
	{
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		button[i]=new JRadioButton("Button "+(i+1));

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		button[i].setBounds(200,i*80,100,50);
```
```
		frame.add(button[i]);
```
```
		button[i].addActionListener(obj);
```
```
	}
```
```
	//Create 3 Checkbox
```
```
	checkbox=new JCheckBox[3];
```
```
	for(int i=0;i<3;i++)
```
```
	{
```

		checkbox[i]=new JCheckBox("Checkbox"+(i+1));

		checkbox[i].setBounds(220,(240)+i*80,100,50);

```
		frame.add(checkbox[i]);
```
```
		checkbox[i].addItemListener(obj);
```
```
	}
```
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	//Display frame
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```
	frame.setVisible(true);
```
```
    }
```
```
    //To display button selected
```

    public void actionPerformed(ActionEvent e)

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    {
```
```
        String s="";
```
```
	for(int i=0;i<3;i++)
```
```
	{
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```
	    if(button[i].isSelected())
```
```
	        s=s+" "+button[i].getText();
```
```
	}
```

	text1.setText("Button(s) Selected : "+" "+s);

```
    }
```
```
    //To display the checkboxes checked
```

    public void itemStateChanged(ItemEvent e)

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    {
```
```
        String s="";
```
```
	for(int i=0;i<3;i++)
```
```
	{	
```
```
	    if(checkbox[i].isSelected())
```

	        s=s+" "+checkbox[i].getText();

```
	}
```

	text2.setText("Checkbox(s) Selected : "+s);

```
    }
```
```
}
```

Program Explanation

1. A frame is created with three Radio Buttons and Check Boxes.
2. Function isSelected is used to get the buttons/checkboxes selected.
3. Appropriate messages is displayed in the labels.

Runtime Test Cases

Here’s the run time test cases to display the Radio Buttons and Check Boxes selected.

Test case 1 – To display the Radio Buttons Selected.