JAVA 第7次作业

package dongzuo;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;
public class Window extends JFrame{
String str;
BorderLayout border;
JPanel P;
    JLabel J1,J2;
    JCheckBox cb1,cb2,cb3;
    ButtonGroup bg;
  public  JRadioButton jb1;
  public JRadioButton jb2;
    Box boxh1,boxh2;
    JTextArea textarea;
    public Window (){}
  public Window (String s)
  {   init(s);
 setVisible(true);
 setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setBounds(100, 100, 300, 300);
  }
 void init(String s){
/*整个界面的布局方式*/
GridLayout grid = new GridLayout(2,1);
  setLayout(grid);
  setTitle(s);
J1 = new JLabel("兴趣");
   J2 = new JLabel("性别");
cb1 = new   JCheckBox("羽毛球");
cb2 = new   JCheckBox("乒乓球");
cb3 = new   JCheckBox("唱歌");
/* JLabel标签，标签文本为“性别”，右边接着是两个JRadioButton按钮，选项分别是“男”、“女”。置成单选按钮*/   
bg = new ButtonGroup(); 
    jb1 = new JRadioButton("男");
jb2 = new JRadioButton("女");
    bg.add(jb1);
    bg.add(jb2);
/*两个盒型容器*/
    boxh1 = Box.createHorizontalBox();
boxh2 = Box.createHorizontalBox();
boxh1.add(J1);
boxh1.add(Box.createHorizontalStrut(1));
boxh1.add(cb1);
boxh1.add(cb2);
boxh1.add(cb3);
boxh2.add(J2);
boxh2.add(Box.createHorizontalStrut(1));
boxh2.add(jb1);
boxh2.add(jb2);
/*面板上的折叠布局方式*/
P= new JPanel();
    GridLayout grid1 = new GridLayout(2,1);
 P.setLayout(grid1);
 P.add(boxh1);
 P.add(boxh2);
add(P,BorderLayout.NORTH);
     /*窗口的CENTER区域放置一个JScrollPane容器，容器中放置一个JTextArea文本域。*/
textarea=new JTextArea();
JScrollPane jp1=new JScrollPane(textarea);
     add(jp1,BorderLayout.CENTER);
     /*事件*/
     JRadioButtonListener  lintener1 =new  JRadioButtonListener ();//listener1是监听器，事件源是JRadioButton
     jb1.addActionListener(lintener1 );
     jb2.addActionListener(lintener1);
     JCheckBoxListener listener2 = new JCheckBoxListener();//listener2是监听器，事件源是JCheckBox
     cb1.addItemListener(listener2);
     cb2.addItemListener(listener2);
     cb3.addItemListener(listener2);
 }
class  JRadioButtonListener implements ActionListener
{
   public void actionPerformed(ActionEvent arg0)
{
if (arg0.getSource()==jb1) {textarea.append("性别：男"+'\n');}
             else if (arg0.getSource()==jb2)  {textarea.append("性别：女"+'\n');}
}
}
 class JCheckBoxListener implements ItemListener
 {
public void itemStateChanged(ItemEvent arg0) {
if(cb1.isSelected()){textarea.append("兴趣：羽毛球"+'\n');}
if(cb2.isSelected()){textarea.append("兴趣：乒乓球"+'\n');}
if(cb3.isSelected()){textarea.append("兴趣：唱歌"+'\n');}
}}
}

package dongzuo;
public class Test {
public static void main(String[] args) {
Window oneview = new  Window("浏览器");
   }
}

总结：注意区分不同控件的事件处理，找好事件源，事件类型，事件监听器。

          学会界面的布局，区分各种布局方式的不同