java 带滚动条的多行文本输入

1 package test;
2
3 import java.awt.GridLayout;
4 import java.awt.LayoutManager;
5 //import java.util.EmptyStackException;
6
7 import javax.swing.JFrame;
8 import javax.swing.JLabel;
9 import javax.swing.JScrollPane;
10 import javax.swing.JTextArea;
11
12 public class test {
13     public static void main(String[] args) {
14         JFrame f = new JFrame("Welcome To Earth!");
15         JTextArea jt = new JTextArea(3, 20);
16         jt.setLineWrap(true);// 如果内容过长。自动换行
17
18         JScrollPane scr = new JScrollPane(jt,
19                 JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
20                 JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
21         // lab.setBounds(10, 10, 120, 20);
22 // jt.setBounds(130, 10, 150, 100);
23         JLabel lab = new JLabel("多行输入文本:");
24
25         f.setLayout(new GridLayout(2, 1));
26
27         f.add(lab);
28         f.add(scr);
29         // f.add(jt);
30         f.setSize(300, 150);
31         f.setLocation(300, 200);
32         f.setVisible(true);
33
34     }
35
36 }