我正在核心java中构建一个项目。我坚持制作一个单选按钮组(用于输入性别(男/女)。为此我需要一个无线电组,这样一次只能选择一个单选按钮;并相应地将输入输入数据库。请帮忙。
答案 0 :(得分:29)
请尝试使用ButtonGroup组件,并将两个名为male和female的JRadioButton组件添加到ButtonGroup对象中,然后使用setVisible(true)将其显示在JFrame中;方法
以下代码应该有用: -
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();
}
}
答案 1 :(得分:6)
这是一个单选按钮分组:
JRadioButton button1 = ...;
button1.setSelected(true);
JRadioButton button2 = ...;
ButtonGroup group = new ButtonGroup();
group.add(button1);
group.add(button2);
答案 2 :(得分:5)
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);
然后将按钮添加到JPanel或类似的东西。