关于JAVA中单选按钮问题 在JAVA中能不能实现点单选按钮后面对按钮说明的文字而选中按钮的功能,若能的话,那实现的代码是什么呢?谢谢各位大侠了! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 给你发给完整能用的吧!import java.awt.Dimension;import java.awt.Rectangle;import java.awt.Toolkit;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import javax.swing.ButtonGroup;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JRadioButton;public class DBChoose extends JFrame implements ItemListener{ private static final long serialVersionUID = 1L; private JPanel jContentPane = null; // 远程数据库地址类型选择 private JRadioButton radiobtn_serverip = null; private JRadioButton radiobtn_servername = null; // 单选按钮组 private ButtonGroup btngrp = null; // @jve:decl-index=0: public String str_url = null; public String str_servername = null; public static String str_serverAddress = null; private JPanel radioPanel = null; private JLabel lab_choose = null; public DBChoose() { super(); initialize(); } private void initialize() { this.setSize(377, 226); this.setContentPane(getJContentPane()); this.setTitle("数据库选择"); this.setResizable(false); //设置窗口位置居中 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frameSize = this.getSize(); if (frameSize.height > screenSize.height) { frameSize.height = screenSize.height; } if (frameSize.width > screenSize.width) { frameSize.width = screenSize.width; } this.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2); this.setVisible(true); } private JPanel getJContentPane() { if (jContentPane == null) { jContentPane = new JPanel(); jContentPane.setLayout(null); jContentPane.add(getRadioPanel(), null); jContentPane.add(getLab_choose(), null); } return jContentPane; } private JRadioButton getRadiobtn_serverip() { if (radiobtn_serverip == null) { radiobtn_serverip = new JRadioButton(); radiobtn_serverip.setText("服务器IP地址:"); radiobtn_serverip.setBounds(new Rectangle(8, 6, 118, 23)); radiobtn_serverip.setSelected(false); radiobtn_serverip.addItemListener(this); } return radiobtn_serverip; } private JRadioButton getRadiobtn_servername() { if (radiobtn_servername == null) { radiobtn_servername = new JRadioButton(); radiobtn_servername.setText("服务器主机名:"); radiobtn_servername.setBounds(new Rectangle(8, 31, 118, 23)); radiobtn_servername.setSelected(true); radiobtn_servername.addItemListener(this); } return radiobtn_servername; } private ButtonGroup setBtngrp() { if (btngrp == null) { btngrp = new ButtonGroup(); btngrp.add(getRadiobtn_serverip()); btngrp.add(getRadiobtn_servername()); } return btngrp; } public void itemStateChanged(ItemEvent e) { if (radiobtn_serverip.isSelected()) {//添加自己想做的事情 } else if (radiobtn_servername.isSelected()) {// 添加自己想做的事情 } } private JPanel getRadioPanel() { if (radioPanel == null) { radioPanel = new JPanel(); radioPanel.setLayout(null); radioPanel.setBounds(new Rectangle(35, 61, 135, 60)); radioPanel.add(getRadiobtn_serverip(), null); radioPanel.add(getRadiobtn_servername(), null); setBtngrp(); } return radioPanel; } public JLabel getLab_choose() { if (lab_choose == null) { lab_choose = new JLabel(); lab_choose.setBounds(new Rectangle(38, 14, 193, 31)); lab_choose.setText("请选着数据库地址:"); } return lab_choose; } public static void main(String []args) { new DBChoose(); }} java中子类继承父类的构造方法吗? 空指针的问题,初学者望大神解答啊 在Eclipse里输入super()时怎么不不提示“构造函数”相关参数? 为什么我编了一个很小的软件,别人用了老死机啊? 请教! 请教一个关于窗口布局的问题。 处学java请教个while循环的小问题 新手问个关于强制转换的问题。 如何把"昇垚"这些字写到文本文件中? 怎样把一句字符串写入一个文件里 实在不知道有什么区别了 遇到的JAVA问题 大家来看看 顺便祝大家5 1节快乐
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;public class DBChoose extends JFrame implements ItemListener
{
private static final long serialVersionUID = 1L; private JPanel jContentPane = null; // 远程数据库地址类型选择
private JRadioButton radiobtn_serverip = null; private JRadioButton radiobtn_servername = null; // 单选按钮组
private ButtonGroup btngrp = null; // @jve:decl-index=0: public String str_url = null; public String str_servername = null; public static String str_serverAddress = null; private JPanel radioPanel = null; private JLabel lab_choose = null;
public DBChoose()
{
super();
initialize();
} private void initialize()
{
this.setSize(377, 226);
this.setContentPane(getJContentPane());
this.setTitle("数据库选择");
this.setResizable(false);
//设置窗口位置居中
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = this.getSize();
if (frameSize.height > screenSize.height)
{
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width)
{
frameSize.width = screenSize.width;
}
this.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
this.setVisible(true);
}
private JPanel getJContentPane()
{
if (jContentPane == null)
{ jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(getRadioPanel(), null);
jContentPane.add(getLab_choose(), null); }
return jContentPane;
}
private JRadioButton getRadiobtn_serverip()
{
if (radiobtn_serverip == null)
{
radiobtn_serverip = new JRadioButton();
radiobtn_serverip.setText("服务器IP地址:");
radiobtn_serverip.setBounds(new Rectangle(8, 6, 118, 23));
radiobtn_serverip.setSelected(false);
radiobtn_serverip.addItemListener(this);
}
return radiobtn_serverip;
} private JRadioButton getRadiobtn_servername()
{
if (radiobtn_servername == null)
{
radiobtn_servername = new JRadioButton();
radiobtn_servername.setText("服务器主机名:");
radiobtn_servername.setBounds(new Rectangle(8, 31, 118, 23));
radiobtn_servername.setSelected(true);
radiobtn_servername.addItemListener(this);
}
return radiobtn_servername;
} private ButtonGroup setBtngrp()
{
if (btngrp == null)
{
btngrp = new ButtonGroup();
btngrp.add(getRadiobtn_serverip());
btngrp.add(getRadiobtn_servername());
} return btngrp;
} public void itemStateChanged(ItemEvent e)
{
if (radiobtn_serverip.isSelected())
{//添加自己想做的事情
}
else if (radiobtn_servername.isSelected())
{
// 添加自己想做的事情
}
}
private JPanel getRadioPanel()
{
if (radioPanel == null)
{
radioPanel = new JPanel();
radioPanel.setLayout(null);
radioPanel.setBounds(new Rectangle(35, 61, 135, 60));
radioPanel.add(getRadiobtn_serverip(), null);
radioPanel.add(getRadiobtn_servername(), null);
setBtngrp();
}
return radioPanel;
} public JLabel getLab_choose()
{
if (lab_choose == null)
{
lab_choose = new JLabel();
lab_choose.setBounds(new Rectangle(38, 14, 193, 31));
lab_choose.setText("请选着数据库地址:");
}
return lab_choose;
}
public static void main(String []args)
{
new DBChoose();
}
}