jlist滚动条的问题，在线等

Question

        private JList    cbFirstName;        private JScrollPane scrollPane;         
 
        String[] words= { "quick", "brown", "hungry", "wild","1","2","3","4","5","5"};
        cbFirstName = new JList(words);
        scrollPane = new   JScrollPane(cbFirstName);         
        cbFirstName.setName("cbSchedule");
        cbFirstName.setFont(font);
        cbFirstName.setBackground(Color.WHITE);
        cbFirstName.setBounds(xtext, y, wtext, htext);
        jpUp.add(cbFirstName);
为什么我这样设置，jlist的滚动条并没有出现，如果我要对jlist的的数据进行复选，可以用鼠标选中多个应该怎么做？谢谢

Answer 1

 scrollPane= new JScrollPane(cbFirstName,
      JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
      JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
cbFirstName.getModel().getElementAt(i) 获取其中一个元素....

Answer 2

scrollPane= new JScrollPane(cbFirstName, 
      JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, 
      JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); 
我添加了，还是不会显示出滚动条

Answer 3

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class MyFrame2 extends JFrame
{
JButton bt1,bt2;
JLabel lb1,lb2;
JPanel p1,p2,p3;
JList ls1;
JComboBox cb1;
JTextField txt1;
JPasswordField pw1;
JTextArea txta1; public MyFrame2 ()
{
Container c=this.getContentPane(); p1=new JPanel();
p2=new JPanel();
p3=new JPanel(); bt1=new JButton("确定");
bt2=new JButton("取消");
lb1=new JLabel("用户名");
lb2=new JLabel("  密码");
txt1=new JTextField(10);
pw1=new JPasswordField(10);
String s[]={"宋体","隶书","楷体","黑体","华文细黑","这个字体名字长一些是为了--------------------------显示水平滚动条"};
ls1=new JList(s);
cb1=new JComboBox();
txta1=new JTextArea();
cb1.setEditable(true);
cb1.addItem("初号");
cb1.addItem("小初");
cb1.addItem("一号");
cb1.addItem("小一");

c.setLayout(new GridLayout(4,1));
p1.add(bt1);
p1.add(bt2);
p3.setLayout(new BorderLayout());
p2.add(cb1);
p3.add(new JScrollPane(ls1));
c.add(p2);
c.add(p3);
c.add(new JScrollPane(txta1));
c.add(p1);
this.setSize(300,300);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String args[])
{
MyFrame2 mf=new MyFrame2();
}
}