/*
 * 选中JComboBox某项 右侧JTextArea显示选中项信息 以追加方式显示
 */

import java.awt.Button;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class YuYiEventDemo extends JFrame{
JPanel comboBoxPanel;
JComboBox list;
JTextArea textInfoArea;
String degreeStr="";
public YuYiEventDemo() {
JLabel labeltext=new JLabel("学历",Label.LEFT);
labeltext.setFont(new Font("Dialog ", Font.PLAIN, 20));
textInfoArea =new JTextArea("显示所选信息:");
String[] degree= {"本科以下","本科","硕士","博士"};
list=new JComboBox(degree);
comboBoxPanel=new JPanel();
GridLayout gridLayout=new GridLayout(1, 3);
comboBoxPanel.add(labeltext);
comboBoxPanel.add(list);
// comboBoxPanel.add(textInfoArea);
setLayout(gridLayout);
add(comboBoxPanel);
add(textInfoArea);
list.addItemListener(new ItemListener() {

@Override
public void itemStateChanged(ItemEvent e) {
//在用户已选定或取消选定某项时调用
degreeStr=(String)list.getSelectedItem();
textInfoArea.append(degreeStr);//JTextArea可以直接使用对象名.append()追加
}
});
}

public static void main(String[] args) {
YuYiEventDemo t=new YuYiEventDemo();
t.setSize(500, 300);
t.setResizable(false);
t.setLocationRelativeTo(null);
t.setVisible(true);
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}