/* * To change this template, choose Tools | Templates * and open the template in the editor. */package lyric;import javax.swing.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;/** * * @author 徐新坤 */public class Main {    /**     * @param args the command line arguments     */    public static void main(String[] args) {        // TODO code application logic here        JFrame jf=new JFrame ("Lyric");//        jf.setDefaultCloseOperation(operation);        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        jf.add("Center",new Structure());        jf.setSize(300,300);        jf.setVisible(true);    }}