java编程高手进帮我翻译一下答案（1）

大哥大姐我是初学的，希望你门能帮我解答一下～（每一句，都给点注视）

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
public class L2 extends JFrame implements ItemListener,ComponentListener,ActionListener,Runnable{
private JTextField Year;
private JLabel lab1;
private JButton up,down;
JLabel days[]=new JLabel[49];
Object month[]={"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
JComboBox Month=new JComboBox(month);
JLabel lmonth=new JLabel("MONTH");
JLabel lyear=new JLabel("YEAR");
JPanel p1,p2;
int selYear,selMonth,day;
int totdays;

Thread 时针=null,分针=null,秒针=null;
int hour_a,hour_b,munite_a,munite_b,second_a,second_b;
int hour=0,munite=0,secon

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
//上面是导入JAVA包
public class L2 extends JFrame implements ItemListener,ComponentListener,ActionListener,Runnable{
//定义类L2,继承自JFrame,并且实现 ItemListener,ComponentListener,ActionListener,Runnable接口
private JTextField Year;
private JLabel lab1;
private JButton up,down; //定义私有成员变量
JLabel days[]=new JLabel[49]; //定义数组,大小49
Object month[]={"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
//定义数组month,存放月份
JComboBox Month=new JComboBox(month); //将月份增加到下拉列表框中
JLabel lmonth=new JLabel("MONTH"); //定义标签MONTH
JLabel lyear=new JLabel("YEAR"); //定义标签YEAR
JPanel p1,p2; //定义2个面板
int selYear,selMonth,day;
int totdays; //定义整型变量