java的Calendar，获取月份少一月的问题及其它注意事项

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java的Calendar，获取月份少一月的问题及其它注意事项：

import java.util.*;
public class DateClass{
public static void main(String args[ ]){
Date m = new Date( );
System.out.println("现在是："+m.toString( ));
Calendar n = Calendar.getInstance( );
int year = n.get(Calendar.YEAR);
int month = n.get(Calendar.MONTH)+1;
int day = n.get(Calendar.DATE);
int week = n.get(Calendar.DAY_OF_WEEK);
Date t = n.getTime ( );
String weekArr = new String("日一二三四五六");
String weekIndexStr=weekArr.substring(week-1, week);
String x = new String( );
x = "现在是："+year+"年"+month+"月"+day+"日，星期"+weekIndexStr;
System.out.println("现在是："+t); System.out.println(x);
}
}