JAVA-itemevent事件响应的处理方式

创建一个信息栏，输入和选择自己的信息，将信息显示在文本框内。

代码：

public class test {
	public static void main(String args[]) {
		ComponentInWindow win=new ComponentInWindow();
		win.setTitle("个人信息");
		win.setBounds(100,100,310,260);
		
		
}

}
import java.awt.*;
import javax.swing.*;
public class ComponentInWindow extends JFrame {
	JTextField textfield;//文本框
	JButton button;//按钮
	JRadioButton radioM,radioF;//单选按钮
	ButtonGroup group;//单选按钮组
	JComboBox comboBox1,comboBox2;//下拉列表
	JCheckBox checkbox1,checkbox2,checkbox3;//复选框
	JTextArea textshow;//文本区域
	OperatorListener operator;//监视ItemEvent事件的监视器
	ComputerListener computer;//监视ActiongEvent事件的监视器
	public ComponentInWindow() {
		init();
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	 void init() {
	 setLayout(new FlowLayout());
	 add(new JLabel("姓名:"));
	 textfield=new JTextField(10);
	 add(textfield);
	 add(new JLabel("按钮:"));
	 button=new JButton("确定");
	 add(button);
	 add(new JLabel("性别:"));
	 group=new ButtonGroup();
	 radioM=new JRadioButton("男");
	 radioF=new JRadioButton("女");
	 group.add(radioM);
	 group.add(radioF);
	 add(radioM);
	 add(radioF);
	 add(new JLabel("系别:"));
	 comboBox1=new JComboBox();
	 comboBox1.addItem("数学与统计学院");
	 comboBox1.addItem("外国语学院");
	 comboBox1.addItem("体育学院");
	 add(comboBox1);
	 add(new JLabel("专业:"));
	 comboBox2=new JComboBox();
	 comboBox2.addItem("统计学");
	 comboBox2.addItem("数学与应用数学");
	 comboBox2.addItem("信息与计算科学");
	 add(comboBox2);
	 add(new JLabel("爱好:"));
	 checkbox1=new JCheckBox("喜欢音乐");
	 checkbox2=new JCheckBox("喜欢旅游");
	 checkbox3=new JCheckBox("喜欢篮球");
	 add(checkbox1);
	 add(checkbox2);
	 add(checkbox3);
	 
	
textshow=new JTextArea(10,20);
	 operator=new OperatorListener();
	 computer=new ComputerListener();
	 operator.setJComboBox(comboBox1,comboBox2);
	 operator.setJCheckBox(checkbox1,checkbox2,checkbox3);
	 operator.setWorkTogether(computer);
	 computer.setJTextField(textfield);
	 computer.setJRadioButton1(radioM);
	 computer.setJRadioButton2(radioF);
	 computer.setJTextArea(textshow);
	
textfield.addActionListener(computer);
	 button.addActionListener(computer);
	 comboBox1.addItemListener(operator);
	 comboBox2.addItemListener(operator);
	 checkbox1.addItemListener(operator);
	 checkbox2.addItemListener(operator);
	 checkbox3.addItemListener(operator);
	
add(new JLabel("个人信息:"));
	 add(textshow);
	}                                                                                                                
}                                                                      
}
import java.awt.event.*;
import javax.swing.*;
public class ComputerListener implements ActionListener {
	JRadioButton radioM,radioF;
	JTextField textfield;
	JTextArea textshow;
	String xueyuan,zhuanye,aihao1,aihao2,aihao3;
	public void setJTextField(JTextField s) {
		textfield=s;
	}
	public void setJRadioButton1(JRadioButton g) {
		radioM=g;
	}
	public void setJRadioButton2(JRadioButton g) {
		radioF=g;
	}
	public void setJTextArea(JTextArea s) {
		textshow=s;
	}
	public void setaihao1(String s){
		aihao1=s;
	}
	public void setaihao2(String s){
		aihao2=s;
	}
	public void setaihao3(String s){
		aihao3=s;
	}
	public void setxueyuan(String s) {
		xueyuan=s;
	}
	public void setzhuanye(String s) {
		zhuanye=s;
	}
	
public void actionPerformed(ActionEvent e){
		String name=textfield.getText();
		String sex;
		if(radioM.isSelected()){
			sex = radioM.getText();
		}
		else if(radioF.isSelected()) {
			sex = radioF.getText();
		}
		else {
			sex = "";
		}
		textshow.append("名字："+name+"\n"+"性别："+sex+"\n"+"学院:"+xueyuan+"\n"+"专业:"+zhuanye+"\n"+"爱好:"+aihao1+aihao2+aihao3);
		
		
}
	

}
import java.awt.event.*;

import javax.swing.*;
public class OperatorListener implements ItemListener {
	JComboBox comBox1,comBox2;
	JCheckBox aihao1,aihao2,aihao3;
	ComputerListener workTogether;
	
public void setJComboBox(JComboBox a,JComboBox b) {
		comBox1=a;
		comBox2=b;
	}
	public void setJCheckBox(JCheckBox a,JCheckBox b,JCheckBox c) {
		aihao1=a;
		aihao2=b;
		aihao3=c;
	}
	public void setWorkTogether(ComputerListener computer){
		workTogether=computer;
	}
	public void itemStateChanged(ItemEvent e) {
		String xueyuan=comBox1.getSelectedItem().toString();
		String zhuanye=comBox2.getSelectedItem().toString();
		String a1=null;
		String a2=null;
		String a3=null;
		if(aihao1.isSelected()){
			a1=aihao1.getText();
		}
		else{
			a1="";
		}
		if(aihao2.isSelected()){
			a2=aihao2.getText();
		}
		else{
			a2="";
		}
		if(aihao3.isSelected()){
			a3=aihao3.getText();
		}
		else{
			a3="";
		}
		workTogether.setxueyuan(xueyuan);
		workTogether.setzhuanye(zhuanye);
		workTogether.setaihao1(a1);
		workTogether.setaihao2(a2);
		workTogether.setaihao3(a3);

		
}

}