java 中能夠實現年月循環的代碼

import java.util.Calendar;

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public class MainTester {

public static void main(String[] args) {

Calendar calendar = Calendar.getInstance();

//設置為12月31日

calendar.set(Calendar.MONTH, 11);

calendar.set(Calendar.DAY_OF_MONTH, 31);

System.out.println("現在日期：" + calendar.getTime());

//再增加一天

calendar.add(Calendar.DAY_OF_MONTH, 1);

System.out.println("增加后的日期：" + calendar.getTime());

}

}

使用Calendar就可以實現，很簡單，程序輸出為：

現在日期：Tue Dec 31 11:50:55 CST 2013

增加后的日期：Wed Jan 01 11:50:55 CST 2014

java中用來判斷平年閏年的代碼怎么寫??

import java.util.*;

public class Judge {

/**

* @param args

*/

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("輸入年份：");

int Num = input.nextInt();

int Y = Num%4;

if ( Y == 0 ) {

System.out.println(+ Num +"份為閏年");

}else{

System.out.println(Num+"份為平年");

}

}

}

這是我當年學java的時候找到資料。

JAVA代碼

連連看java源代碼

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class lianliankan implements ActionListener

{

JFrame mainFrame; //主面板

Container thisContainer;

JPanel centerPanel,southPanel,northPanel; //子面板

JButton diamondsButton[][] = new JButton[6][5];//游戲按鈕數組

JButton exitButton,resetButton,newlyButton; //退出，重列，重新開始按鈕

JLabel fractionLable=new JLabel("0"); //分數標簽

JButton firstButton,secondButton; //分別記錄兩次被選中的按鈕

int grid[][] = new int[8][7];//儲存游戲按鈕位置

static boolean pressInformation=false; //判斷是否有按鈕被選中

int x0=0,y0=0,x=0,y=0,fristMsg=0,secondMsg=0,validateLV; //游戲按鈕的位置坐標

int i,j,k,n;//消除方法控制

public void init(){

mainFrame=new JFrame("JKJ連連看");

thisContainer = mainFrame.getContentPane();

thisContainer.setLayout(new BorderLayout());

centerPanel=new JPanel();

southPanel=new JPanel();

northPanel=new JPanel();

thisContainer.add(centerPanel,"Center");

thisContainer.add(southPanel,"South");

thisContainer.add(northPanel,"North");

centerPanel.setLayout(new GridLayout(6,5));

for(int cols = 0;cols 6;cols++){

for(int rows = 0;rows 5;rows++ ){

diamondsButton[cols][rows]=new JButton(String.valueOf(grid[cols+1][rows+1]));

diamondsButton[cols][rows].addActionListener(this);

centerPanel.add(diamondsButton[cols][rows]);

}

}

exitButton=new JButton("退出");

exitButton.addActionListener(this);

resetButton=new JButton("重列");

resetButton.addActionListener(this);

newlyButton=new JButton("再來一局");

newlyButton.addActionListener(this);

southPanel.add(exitButton);

southPanel.add(resetButton);

southPanel.add(newlyButton);

fractionLable.setText(String.valueOf(Integer.parseInt(fractionLable.getText())));

northPanel.add(fractionLable);

mainFrame.setBounds(280,100,500,450);

mainFrame.setVisible(true);

}

public void randomBuild() {

int randoms,cols,rows;

for(int twins=1;twins=15;twins++) {

randoms=(int)(Math.random()*25+1);

for(int alike=1;alike=2;alike++) {

cols=(int)(Math.random()*6+1);

rows=(int)(Math.random()*5+1);

while(grid[cols][rows]!=0) {

cols=(int)(Math.random()*6+1);

rows=(int)(Math.random()*5+1);

}

this.grid[cols][rows]=randoms;

}

}

}

public void fraction(){

fractionLable.setText(String.valueOf(Integer.parseInt(fractionLable.getText())+100));

}

public void reload() {

int save[] = new int[30];

int n=0,cols,rows;

int grid[][]= new int[8][7];

for(int i=0;i=6;i++) {

for(int j=0;j=5;j++) {

if(this.grid[i][j]!=0) {

save[n]=this.grid[i][j];

n++;

}

}

}

n=n-1;

this.grid=grid;

while(n=0) {

cols=(int)(Math.random()*6+1);

rows=(int)(Math.random()*5+1);

while(grid[cols][rows]!=0) {

cols=(int)(Math.random()*6+1);

rows=(int)(Math.random()*5+1);

}

this.grid[cols][rows]=save[n];

n--;

}

mainFrame.setVisible(false);

pressInformation=false; //這里一定要將按鈕點擊信息歸為初始

init();

for(int i = 0;i 6;i++){

for(int j = 0;j 5;j++ ){

if(grid[i+1][j+1]==0)

diamondsButton[i][j].setVisible(false);

}

}

}

public void estimateEven(int placeX,int placeY,JButton bz) {

if(pressInformation==false) {

x=placeX;

y=placeY;

secondMsg=grid[x][y];

secondButton=bz;

pressInformation=true;

}

else {

x0=x;

y0=y;

fristMsg=secondMsg;

firstButton=secondButton;

x=placeX;

y=placeY;

secondMsg=grid[x][y];

secondButton=bz;

if(fristMsg==secondMsg secondButton!=firstButton){

xiao();

}

}

}

public void xiao() { //相同的情況下能不能消去。仔細分析，不一條條注釋

if((x0==x (y0==y+1||y0==y-1)) || ((x0==x+1||x0==x-1)(y0==y))){ //判斷是否相鄰

remove();

}

else{

for (j=0;j7;j++ ) {

if (grid[x0][j]==0){ //判斷第一個按鈕同行哪個按鈕為空

if (yj) { //如果第二個按鈕的Y坐標大于空按鈕的Y坐標說明第一按鈕在第二按鈕左邊

for (i=y-1;i=j;i-- ){ //判斷第二按鈕左側直到第一按鈕中間有沒有按鈕

if (grid[x][i]!=0) {

k=0;

break;

}

else //K=1說明通過了第一次驗證

}

if (k==1) {

linePassOne();

}

}

if (yj){ //如果第二個按鈕的Y坐標小于空按鈕的Y坐標說明第一按鈕在第二按鈕右邊

for (i=y+1;i=j ;i++ ){ //判斷第二按鈕左側直到第一按鈕中間有沒有按鈕

if (grid[x][i]!=0){

k=0;

break;

}

else

}

if (k==1){

linePassOne();

}

}

if (y==j ) {

linePassOne();

}

}

if (k==2) {

if (x0==x) {

remove();

}

if (x0x) {

for (n=x0;n=x-1;n++ ) {

if (grid[n][j]!=0) {

k=0;

break;

}

if(grid[n][j]==0 n==x-1) {

remove();

}

}

}

if (x0x) {

for (n=x0;n=x+1 ;n-- ) {

if (grid[n][j]!=0) {

k=0;

break;

}

if(grid[n][j]==0 n==x+1) {

remove();

}

}

}

}

}

for (i=0;i8;i++ ) { //列

if (grid[i][y0]==0) {

if (xi) {

for (j=x-1;j=i ;j-- ) {

if (grid[j][y]!=0) {

k=0;

break;

}

else

}

if (k==1) {

rowPassOne();

}

}

if (xi) {

for (j=x+1;j=i;j++ ) {

if (grid[j][y]!=0) {

k=0;

break;

}

else

}

if (k==1) {

rowPassOne();

}

}

if (x==i) {

rowPassOne();

}

}

if (k==2){

if (y0==y) {

remove();

}

if (y0y) {

for (n=y0;n=y-1 ;n++ ) {

if (grid[i][n]!=0) {

k=0;

break;

}

if(grid[i][n]==0 n==y-1) {

remove();

}

}

}

if (y0y) {

for (n=y0;n=y+1 ;n--) {

if (grid[i][n]!=0) {

k=0;

break;

}

if(grid[i][n]==0 n==y+1) {

remove();

}

}

}

}

}

}

}

public void linePassOne(){

if (y0j){ //第一按鈕同行空按鈕在左邊

for (i=y0-1;i=j ;i-- ){ //判斷第一按鈕同左側空按鈕之間有沒按鈕

if (grid[x0][i]!=0) {

k=0;

break;

}

else //K=2說明通過了第二次驗證

}

}

if (y0j){ //第一按鈕同行空按鈕在與第二按鈕之間

for (i=y0+1;i=j ;i++){

if (grid[x0][i]!=0) {

k=0;

break;

}

else

}

}

}

public void rowPassOne(){

if (x0i) {

for (j=x0-1;j=i ;j-- ) {

if (grid[j][y0]!=0) {

k=0;

break;

}

else

}

}

if (x0i) {

for (j=x0+1;j=i ;j++ ) {

if (grid[j][y0]!=0) {

k=0;

break;

}

else

}

}

}

public void remove(){

firstButton.setVisible(false);

secondButton.setVisible(false);

fraction();

pressInformation=false;

k=0;

grid[x0][y0]=0;

grid[x][y]=0;

}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==newlyButton){

int grid[][] = new int[8][7];

this.grid = grid;

randomBuild();

mainFrame.setVisible(false);

pressInformation=false;

init();

}

if(e.getSource()==exitButton)

System.exit(0);

if(e.getSource()==resetButton)

reload();

for(int cols = 0;cols 6;cols++){

for(int rows = 0;rows 5;rows++ ){

if(e.getSource()==diamondsButton[cols][rows])

estimateEven(cols+1,rows+1,diamondsButton[cols][rows]);

}

}

}

public static void main(String[] args) {

lianliankan llk = new lianliankan();

llk.randomBuild();

llk.init();

}

}

//old 998 lines

//new 318 lines

java怎樣判斷兩個日期之間相差幾周(支持跨年)?

/**

?*?獲取兩個日期相差的天數

?*?@param?big

?*?@param?small

?*?@return

?*/

public?static?int?getTwoDatesDifOfDay(Date?big,Date?small){

Calendar?cal1?=?Calendar.getInstance();

cal1.setTime(big);

Calendar?cal2?=?Calendar.getInstance();

cal2.setTime(small);

if(cal1.get(Calendar.MONTH)?!=?11??cal2.get(Calendar.MONTH)==11){//跨年

Calendar?cal3?=?Calendar.getInstance();

cal3.set(Calendar.MONTH,?11);

cal3.set(Calendar.DAY_OF_MONTH,?31);

return?cal3.get(Calendar.DAY_OF_YEAR)-cal2.get(Calendar.DAY_OF_YEAR)+cal1.get(Calendar.DAY_OF_YEAR);

}else{

return? cal1.get(Calendar.DAY_OF_YEAR)-cal2.get(Calendar.DAY_OF_YEAR);

}

}

/**

?*?獲取兩個日期相差的周數

?*?@param?big

?*?@param?small

?*?@return

?*/

public?static?int?getTwoDatesDifOfWeek(Date?big,Date?small){

Calendar?cal1?=?Calendar.getInstance();

cal1.setTime(big);

Calendar?cal2?=?Calendar.getInstance();

cal2.setTime(small);

if(cal1.get(Calendar.MONTH)?!=?11??cal2.get(Calendar.MONTH)==11){//跨年

Calendar?cal3?=?Calendar.getInstance();

cal3.set(Calendar.MONTH,?11);

cal3.set(Calendar.DAY_OF_MONTH,?31);

return?cal3.get(Calendar.WEEK_OF_YEAR)-cal2.get(Calendar.WEEK_OF_YEAR)+cal1.get(Calendar.WEEK_OF_YEAR);

}else{

return? cal1.get(Calendar.WEEK_OF_YEAR)-cal2.get(Calendar.WEEK_OF_YEAR);

}

}

java 如何判斷 一年的最后一周是否跨年

給定一個時間范圍判斷周的范圍并且跨年為新的一周即跨年時分為兩周

public class Week{

public static void main(String[] args) {

SimpleDateFormat myFormatterExt = new SimpleDateFormat("yyyy-MM-dd");

Date b_date = null;

Date e_date = null;

try {

b_date = myFormatterExt.parse("2010-12-26");//開始時間

e_date = myFormatterExt.parse("2011-01-06");//結束時間

//e_date = myFormatterExt.parse("2011-01-08");

// date= myFormatterExt.parse("2010-12-31 00:00:00");

// String week = HNFDCommon.getWeek(date);

//System.out.println(week+"week");

} catch (ParseException e) {

e.printStackTrace();

}

b_date = getFirstDayOfWeek(b_date);

e_date = getLastDayOfWeek(e_date);

int dayOfweek = 0; //日期為星期幾判斷12月最后一個星期用

while (b_date.getTime() == e_date.getTime() || b_date.before(e_date))

{

String week = HNFDCommon.getWeek(b_date);

System.out.println(week+"ddd"+myFormatterExt.format(b_date));

String days = myFormatterExt.format(b_date).substring(8,10);

if(dayOfweek0){

b_date.setDate(b_date.getDate() +(7-dayOfweek));

dayOfweek = 0;

}else{

if(Integer.parseInt(week.substring(5,7))=50 (31- Integer.parseInt(days))7){

Date c_date = new Date();

c_date.setYear(b_date.getYear());

c_date.setMonth(b_date.getMonth());

c_date.setDate(31);

dayOfweek = getDayOfWeek(c_date);

b_date.setDate(b_date.getDate() +dayOfweek-1);

if(week.equals(HNFDCommon.getWeek(b_date))){

b_date.setDate(b_date.getDate() +(7-dayOfweek));

dayOfweek = 0;

}

}

else{

b_date.setDate(b_date.getDate() +7);

}

}

}

}

public static Date getLastDayOfWeek(Date date) {

SimpleDateFormat sd = new SimpleDateFormat("yyyy");

Calendar c = new GregorianCalendar();

c.setFirstDayOfWeek(Calendar.SUNDAY);

c.setTime(date);

c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()+6); // Sunday

if(!sd.format(date).equals(sd.format(c.getTime()))){

c.setTime(date);

}

return c.getTime();

}

public static Date getFirstDayOfWeek(Date date) {

SimpleDateFormat sd = new SimpleDateFormat("yyyy");

Calendar c = new GregorianCalendar();

c.setFirstDayOfWeek(Calendar.SUNDAY);

c.setTime(date);

c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()); // Sunday

if(!sd.format(date).equals(sd.format(c.getTime()))){

c.setTime(date);

}

return c.getTime();

}

public static int getDayOfWeek(Date date) {

Calendar c = new GregorianCalendar();

c.setFirstDayOfWeek(Calendar.SUNDAY);

c.setTime(date);

//c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6); // Sunday

return c.get(Calendar.DAY_OF_WEEK);

}

}

HNFDCommon 類中：

public static String getWeek(Date date)

{

String rtn="";

int year;

int week;

SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");

Calendar cd = Calendar.getInstance();

cd.setTime(date);

year=cd.get(Calendar.YEAR);

week = cd.get(Calendar.WEEK_OF_YEAR);

//System.out.println("ttt"+sd.format(cd.getTime())+"bbb"+week);

int vmonth = cd.get(Calendar.MONTH)+1;

if(week == 1 vmonth == 12){

cd.add(Calendar.WEEK_OF_YEAR,-1);

week =cd.get(Calendar.WEEK_OF_YEAR)+1;

}

if(week 6 vmonth == 1){

year--;

}

if(week 10){

rtn=year+"00"+week;

}

else{

rtn=year+"0"+week;

}

return rtn;

}

當前文章：java跨年代碼,一起跨年代碼
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