How to add a radio button group in a core java program such that only one radio button is selected at one time?

问题

I am building a project in core java. BUt i'm stuck in making a radio button group ( for entering the gender (male/female). For that i need a radio group such that only one radio button is selected at one time; and take the input into the database accordingly. Please help.

回答1:

Kindly try using ButtonGroup component and add two JRadioButton components named male and female to the ButtonGroup object and then display it in a JFrame using setVisible(true); method.

The Below code should be useful :-

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;

public class Rb extends JFrame {
    Rb() {
        JRadioButton male = new JRadioButton("male");
        JRadioButton female = new JRadioButton("Female");
        ButtonGroup bG = new ButtonGroup();
        bG.add(male);
        bG.add(female);
        this.setSize(100, 200);
        this.setLayout(new FlowLayout());
        this.add(male);
        this.add(female);
        male.setSelected(true);
        this.setVisible(true);
    }

    public static void main(String args[]) {
        Rb j = new Rb();
    }
}

回答2:

Here's a radio button grouping:

JRadioButton button1 = ...;
button1.setSelected(true);
JRadioButton button2 = ...;
ButtonGroup group = new ButtonGroup();
group.add(button1);
group.add(button2);

回答3:

    JPanel radioButtonPanel = new JPanel();
    append = new JRadioButton("append");
    build = new JRadioButton("x.x.1");
    build.setSelected(true); //sets this button as selected on startup
    small = new JRadioButton("x.1.x");
    huge = new JRadioButton("1.x.x");

    // Create the button group to keep only one selected.
    ButtonGroup btnGroup = new ButtonGroup();
    btnGroup.add(append);
    btnGroup.add(build);
    btnGroup.add(small);
    btnGroup.add(huge);

Then you add your Buttons to your JPanel or something similar.

来源：https://stackoverflow.com/questions/17770944/how-to-add-a-radio-button-group-in-a-core-java-program-such-that-only-one-radio

标签

java

swing

jradiobutton

buttongroup