输入本年的某个月后，屏幕输出这个月的月历，每星期一行，从星期日开始，到星期六结束。
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import java.util.*;
public class Year{
/**
*判断是否为闰年
*/
public boolean getIsRun(int year){
if((year%4==0 year %100 !=0)||(year%400==0)){
return true;
}
return false;
}
/**
*返回某年某月有多少天。
*/
public int getDay(int year ,int month){
int[] day={31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//闰年月份
int[] day1={31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};//普通月份
if(this.getIsRun(year)){
return day[month+1];
}else{
return day1[month+1];
}
}
/**
*返回这个月的1号是星期几
*/
public int getWeek(int year,int month){
Date date=new Date();
date.setYear(year);
date.setMonth(month);
Calendar calendar=Calendar.getInstance();
calendar.setTime(date);
return calendar.get(calendar.DAY_OF_WEEK);
}
/**
*打印出来，嘎嘎
*/
public void showPrint(int year,int month){
int day=this.getDay(year,month);
int week=this.getWeek(year,month);
System.out.println("日\t一\t二\t三\t四\t五\t六\n");
for(int i=0;i=week;i++){//
System.out.print (" \t");
}
for(int j=1;j=day;j++){
if((j+week)%7==0){
System.out.println ();
}
System.out.print (j+"\t");
}
// System.out.println(week);
}
public static void main(String[] args){
Year y=new Year();
y.showPrint(2008,3);
}
}
package mycalendar;
import java.util.*;
class ViewMonth {
int month;
int year;
ViewMonth(final int displayMonth, final int displayYear) {
month = displayMonth;
year = displayYear;
}
private String checkMonth() {
String[] months = {
"1 月" , "2 月" , "3 月",
"4 月" , "5 月" , "6 月",
"7 月" , "8 月" , "9 月",
"10 月" , "11 月" , "12 月"
};
return months[month];
}
private int checkDays() {
int[] numofDays = {
31, 28, 31,
30, 31, 30,
31, 31, 30,
31, 30, 31
};
return numofDays[month];
}
/**
* 使用此方法打印该月的日历.
*/
void printMonth() {
/* 将该月份起始处的天数留空. */
int initialSpaces = 0;
try {
/* 获取月份名称. */
String monthName = checkMonth();
System.out.println();
System.out.println("\t\t\t " + year + " 年 " + monthName );
System.out.println();
} catch (ArrayIndexOutOfBoundsException ae) {
System.out.println("超出范围 ..........");
System.exit(0);
}
GregorianCalendar cal = new GregorianCalendar(year, month, 1);
System.out.println("\t日\t一\t二\t三\t四\t五\t六");
initialSpaces = cal.get(Calendar.DAY_OF_WEEK) - 1;
/* 获取天数. */
int daysInMonth = checkDays();
/* 检查是否为闰年并为二月增加一天. */
if (cal.isLeapYear(cal.get(Calendar.YEAR)) month == 1) {
++daysInMonth;
}
for (int ctr = 0; ctr initialSpaces; ctr++) {
System.out.print("\t");
}
for (int ctr = 1; ctr = daysInMonth; ctr++) {
/* 为单个日期添加空格. */
if (ctr = 9) {
System.out.print(" ");
}
System.out.print("\t" + ctr);
/* 检查行的末尾. */
if ((initialSpaces + ctr) % 7 == 0) {
System.out.println();
} else {
System.out.print(" ");
}
}
System.out.println();
}
}
class J7上机2 {
protected J7上机2() {
}
public static void main(String[] args) {
int month, year;
if (args.length == 2) {
System.out.println("显示日历");
System.out.println();
int mon = Integer.parseInt(args[0]);
month = mon - 1;
year = Integer.parseInt(args[1]);
} else {
Calendar today = Calendar.getInstance();
month = today.get(Calendar.MONTH);
year = today.get(Calendar.YEAR);
}
ViewMonth mv = new ViewMonth(month, year);
mv.printMonth();
}
}
给你
改了下，终于改好了。。。
楼上改的还是有点问题，因为他原程序并不能正确显示日期。。。
1.数组ARR没有初始化。
2.F1和F2没有初始化。
3.打印日期的逻辑有问题。
4.计算var的逻辑有问题。
package test;
import java.applet.Applet;
import java.awt.Button;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import java.util.Date;
public class Cal extends Applet implements ActionListener {
Label L1 = new Label("输入年份");
Label L2 = new Label("输入月份");
TextField F1 = new TextField(5);
TextField F2 = new TextField(5);
Button B1 = new Button("查询");
int arr[] = new int[12];
String ARR[];
int var;
public void init() {
add(L1);
add(F1);
add(L2);
add(F2);
add(B1);
Date date = new Date();
F1.setText(String.valueOf(date.getYear() + 1900));
F2.setText(String.valueOf(date.getMonth() + 1));
B1.addActionListener(this);
arr[0] = arr[2] = arr[4] = arr[6] = arr[7] = arr[9] = arr[11] = 31;
arr[3] = arr[5] = arr[8] = arr[10] = 30;
date.setDate(1);
var = date.getDay();
}
public void actionPerformed(ActionEvent e) {
int x = Integer.parseInt(F1.getText()), i = Integer.parseInt(F2
.getText()) - 1, s = 0;
Date date = new Date();
date.setYear(x - 1900);
date.setMonth(i);
date.setDate(1);
var = date.getDay();
repaint();
}
public void paint(Graphics g) {
int xpos, ypos;
arr[0] = arr[2] = arr[4] = arr[6] = arr[7] = arr[9] = arr[11] = 31;
arr[3] = arr[5] = arr[8] = arr[10] = 30;
int x = Integer.parseInt(F1.getText()), i = Integer.parseInt(F2
.getText()) - 1;
if ((x % 4 == 0 x % 100 != 0) || (x % 400 == 0))
arr[1] = 29;
else
arr[1] = 28;
g.drawString("星期一", 50, 50);
g.drawString("星期二", 100, 50);
g.drawString("星期三", 150, 50);
g.drawString("星期四", 200, 50);
g.drawString("星期五", 250, 50);
g.drawString("星期六", 300, 50);
g.drawString("星期日", 350, 50);
ARR = new String[arr[i]];
int j = 0, k = 1;
while (k = arr[i]) {
ARR[j] = String.valueOf(k);
k ++;
j ++;
}
int line = 0;
for (int m = 0 ; m ARR.length ; m ++) {
ypos = 50 + 50 * (line + 1);
xpos = (var * 50 + 50 * (m % 7)) % 350;
if (xpos == 0) {
xpos = 350;
line ++;
}
g.drawString(ARR[m], xpos, ypos);
}
}
}
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