清华大学：JAVA教学课件：8-4

程序8-4：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JLabelDemo {
JFrame frame = new JFrame ("JLabel Demo");
JLabel label1,label2,label3,label4,label5;
public static void main(String args[]) {
JLabelDemo ld = new JLabelDemo();
ld.go();
}
public void go() {
label1 = new JLabel("Only Text Label");
label2 = new JLabel("Right Label",JLabel,RIGHT); //右对齐
ImageIcon icon = new ImageIcon("dukeWaveRed.gif");
label3 = new JLabel(icon);
label3.setVerticalAlignment (JLabel.BOTTOM); //底部对齐
label4 = new JLabel("Image and Text",
icon,
JLabel.LEFT); //左对齐
label4.setVerticalAlignment (JLabel.TOP); //顶部对齐
//设置文本信息和图标的相对位置：文本信息在图标的底部，与图标中间对齐
label4.setVerticalTextPosition(JLabel.BOTTOM);
label4.setHorizontalTextPosition(JLabel.CENTER);
label5 = new JLabel("Input your name here");
JTextField nameField = new JTextField(12);
JPanel panel = new JPanel();
panel.add(label5);
panel.add(nameField);
JPanel panel2 = new JPanel();
panel2.setLayout(new GridLayout(3,1)); //3行1列
panel2.add(label1);
panel2.add(label2);
panel2.add(panel);
Container cp = frame.getContentPane();
cp.setLayout(new GridLayout(3,1));
cp.add(panel2);
cp.add(label3);
cp.add(label4);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,350);
frame.setVisible(true);
}
}