Java如何實現驗證碼驗證功能

Java如何實現驗證碼驗證功能呢？日常生活中，驗證碼隨處可見，他可以在一定程度上保護賬號安全，那么他是怎么實現的呢？

創新互聯堅持“要么做到，要么別承諾”的工作理念，服務領域包括：網站制作、成都做網站、企業官網、英文網站、手機端網站、網站推廣等服務，滿足客戶于互聯網時代的昆明網站設計、移動媒體設計的需求，幫助企業找到有效的互聯網解決方案。努力成為您成熟可靠的網絡建設合作伙伴！

Java實現驗證碼驗證功能其實非常簡單：用到了一個Graphics類在畫板上繪制字母，隨機選取一定數量的字母隨機生成，然后在畫板上隨機生成幾條干擾線。

首先，寫一個驗證碼生成幫助類，用來繪制隨機字母：

import?java.awt.Color;

import?java.awt.Font;

import?java.awt.Graphics;

import?java.awt.image.BufferedImage;

import?java.io.IOException;

import?java.io.OutputStream;

import?java.util.Random;

import?javax.imageio.ImageIO;

public?final?class?GraphicHelper?{

/**

*?以字符串形式返回生成的驗證碼，同時輸出一個圖片

*

*?@param?width

*????????????圖片的寬度

*?@param?height

*????????????圖片的高度

*?@param?imgType

*????????????圖片的類型

*?@param?output

*????????????圖片的輸出流(圖片將輸出到這個流中)

*?@return?返回所生成的驗證碼(字符串)

*/

public?static?String?create(final?int?width,?final?int?height,?final?String?imgType,?OutputStream?output)?{

StringBuffer?sb?=?new?StringBuffer();

Random?random?=?new?Random();

BufferedImage?image?=?new?BufferedImage(width,?height,?BufferedImage.TYPE_INT_RGB);

Graphics?graphic?=?image.getGraphics();

graphic.setColor(Color.getColor("F8F8F8"));

graphic.fillRect(0,?0,?width,?height);

Color[]?colors?=?new?Color[]?{?Color.BLUE,?Color.GRAY,?Color.GREEN,?Color.RED,?Color.BLACK,?Color.ORANGE,

Color.CYAN?};

//?在?"畫板"上生成干擾線條?(?50?是線條個數)

for?(int?i?=?0;?i??50;?i++)?{

graphic.setColor(colors[random.nextInt(colors.length)]);

final?int?x?=?random.nextInt(width);

final?int?y?=?random.nextInt(height);

final?int?w?=?random.nextInt(20);

final?int?h?=?random.nextInt(20);

final?int?signA?=?random.nextBoolean()???1?:?-1;

final?int?signB?=?random.nextBoolean()???1?:?-1;

graphic.drawLine(x,?y,?x?+?w?*?signA,?y?+?h?*?signB);

}

//?在?"畫板"上繪制字母

graphic.setFont(new?Font("Comic?Sans?MS",?Font.BOLD,?30));

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

final?int?temp?=?random.nextInt(26)?+?97;

String?s?=?String.valueOf((char)?temp);

sb.append(s);

graphic.setColor(colors[random.nextInt(colors.length)]);

graphic.drawString(s,?i?*?(width?/?6),?height?-?(height?/?3));

}

graphic.dispose();

try?{

ImageIO.write(image,?imgType,?output);

}?catch?(IOException?e)?{

e.printStackTrace();

}

return?sb.toString();

}

}?

接著，創建一個servlet，用來固定圖片大小，以及處理驗證碼的使用場景，以及捕獲頁面生成的驗證碼（捕獲到的二維碼與用戶輸入的驗證碼一致才能通過）。

import?java.io.OutputStream;

import?javax.servlet.ServletException;

import?javax.servlet.annotation.WebServlet;

import?javax.servlet.http.HttpServlet;

import?javax.servlet.http.HttpServletRequest;

import?javax.servlet.http.HttpServletResponse;

import?javax.servlet.http.HttpSession;

@WebServlet(urlPatterns?=?"/verify/regist.do"?)

public?class?VerifyCodeServlet?extends?HttpServlet?{

private?static?final?long?serialVersionUID?=?3398560501558431737L;

@Override

protected?void?service(HttpServletRequest?request,?HttpServletResponse?response)

throws?ServletException,?IOException?{

//?獲得?當前請求?對應的?會話對象

HttpSession?session?=?request.getSession();

//?從請求中獲得?URI?(?統一資源標識符?)

String?uri?=?request.getRequestURI();

System.out.println("hello?:?"?+?uri);

final?int?width?=?180;?//?圖片寬度

final?int?height?=?40;?//?圖片高度

final?String?imgType?=?"jpeg";?//?指定圖片格式?(不是指MIME類型)

final?OutputStream?output?=?response.getOutputStream();?//?獲得可以向客戶端返回圖片的輸出流

//?(字節流)

//?創建驗證碼圖片并返回圖片上的字符串

String?code?=?GraphicHelper.create(width,?height,?imgType,?output);

System.out.println("驗證碼內容:?"?+?code);

//?建立?uri?和?相應的?驗證碼?的關聯?(?存儲到當前會話對象的屬性中?)

session.setAttribute(uri,?code);

System.out.println(session.getAttribute(uri));

}

}?

接著寫一個HTML注冊頁面用來檢驗一下：

html

head

meta?charset="UTF-8"

title注冊/title

link?rel="stylesheet"?href="styles/general.css"

link?rel="stylesheet"?href="styles/cell.css"

link?rel="stylesheet"?href="styles/form.css"

script?type="text/javascript"?src="js/ref.js"/script

style?type="text/css"?

.logo-container?{

margin-top:?50px?;

}

.logo-container?img?{

width:?100px?;

}

.message-container?{

height:?80px?;

}

.link-container?{

height:?40px?;

line-height:?40px?;

}

.link-container?a?{

text-decoration:?none?;

}

/style

/head

body

div?class="container?form-container"

form?action="/wendao/regist.do"?method="post"

div?class="form"?!--?注冊表單開始?--

div?class="form-row"

span?class="cell-1"

i?class="fa?fa-user"/i

/span

span?class="cell-11"?style="text-align:?left;"

input?type="text"?name="username"?placeholder="請輸入用戶名"

/span

/div

div?class="form-row"

span?class="cell-1"

i?class="fa?fa-key"/i

/span

span?class="cell-11"?style="text-align:?left;"

input?type="password"?name="password"?placeholder="請輸入密碼"

/span

/div

div?class="form-row"

span?class="cell-1"

i?class="fa?fa-keyboard-o"/i

/span

span?class="cell-11"?style="text-align:?left;"

input?type="password"?name="confirm"?placeholder="請確認密碼"

/span

/div

div?class="form-row"

span?class="cell-7"

input?type="text"?name="verifyCode"?placeholder="請輸入驗證碼"

/span

span?class="cell-5"?style="text-align:?center;"

img?src="/demo/verify/regist.do"?onclick="myRefersh(this)"

/span

/div

div?class="form-row"?style="border:?none;"

span?class="cell-6"?style="text-align:?left"

input?type="reset"?value="重置"

/span

span?class="cell-6"??style="text-align:right;"

input?type="submit"?value="注冊"

/span

/div

/div?!--?注冊表單結束?--

/form

/div

/body

/html

效果如下圖：

在控制臺接收到的圖片中驗證碼的變化如下：

當點擊刷新頁面的時候，驗證碼也會隨著變化，但我們看不清驗證碼時，只要點擊驗證碼就會刷新，這樣局部的刷新可以用JavaScript來實現。

在img

src="/demo/verify/regist.do"中，添加一個問號和一串后綴數字，當刷新時讓后綴數字不斷改變，那么形成的驗證碼也會不斷變化，我們可以采用的一種辦法是后綴數字用date代替，date獲取本機時間，時間是隨時變的，這樣就保證了刷新驗證碼可以隨時變化。

代碼如下：

function?myRefersh(?e?)?{

const?source?=?e.src?;?//?獲得原來的?src?中的內容

//console.log(?"source?:?"?+?source??)?;

var?index?=?source.indexOf(?"?"?)?;??//?從?source?中尋找???第一次出現的位置?(如果不存在則返回?-1?)

//console.log(?"index?:?"?+?index??)?;

if(?index??-1?)?{?//?如果找到了????就進入內部

var?s?=?source.substring(?0?,?index?)?;?//?從?source?中截取?index?之前的內容?(?index?以及?index?之后的內容都被舍棄?)

//console.log(?"s?:?"?+?s??)?;

var?date?=?new?Date();?//?創建一個?Date?對象的?一個?實例

var?time?=?date.getTime()?;?//?從?新創建的?Date?對象的實例中獲得該時間對應毫秒值

e.src?=?s?+?"?time="?+?time?;?//?將?加了?尾巴?的?地址?重新放入到?src?上

//console.log(?e.src?)?;

}?else?{

var?date?=?new?Date();

e.src?=?source?+?"?time="?+?date.getTime();

}

}

如回答不詳細可追問

如何用70行Java代碼實現神經網絡算法

如何用70行Java代碼實現神經網絡算法

import java.util.Random;

public class BpDeep{

public double[][] layer;//神經網絡各層節點

public double[][] layerErr;//神經網絡各節點誤差

public double[][][] layer_weight;//各層節點權重

public double[][][] layer_weight_delta;//各層節點權重動量

public double mobp;//動量系數

public double rate;//學習系數

public BpDeep(int[] layernum, double rate, double mobp){

this.mobp = mobp;

this.rate = rate;

layer = new double[layernum.length][];

layerErr = new double[layernum.length][];

layer_weight = new double[layernum.length][][];

layer_weight_delta = new double[layernum.length][][];

Random random = new Random();

for(int l=0;llayernum.length;l++){

layer[l]=new double[layernum[l]];

layerErr[l]=new double[layernum[l]];

if(l+1layernum.length){

layer_weight[l]=new double[layernum[l]+1][layernum[l+1]];

layer_weight_delta[l]=new double[layernum[l]+1][layernum[l+1]];

for(int j=0;jlayernum[l]+1;j++)

for(int i=0;ilayernum[l+1];i++)

layer_weight[l][j][i]=random.nextDouble();//隨機初始化權重

}

}

}

//逐層向前計算輸出

public double[] computeOut(double[] in){

for(int l=1;llayer.length;l++){

for(int j=0;jlayer[l].length;j++){

double z=layer_weight[l-1][layer[l-1].length][j];

for(int i=0;ilayer[l-1].length;i++){

layer[l-1][i]=l==1?in[i]:layer[l-1][i];

z+=layer_weight[l-1][i][j]*layer[l-1][i];

}

layer[l][j]=1/(1+Math.exp(-z));

}

}

return layer[layer.length-1];

}

//逐層反向計算誤差并修改權重

public void updateWeight(double[] tar){

int l=layer.length-1;

for(int j=0;jlayerErr[l].length;j++)

layerErr[l][j]=layer[l][j]*(1-layer[l][j])*(tar[j]-layer[l][j]);

while(l--0){

for(int j=0;jlayerErr[l].length;j++){

double z = 0.0;

for(int i=0;ilayerErr[l+1].length;i++){

z=z+l0?layerErr[l+1][i]*layer_weight[l][j][i]:0;

layer_weight_delta[l][j][i]= mobp*layer_weight_delta[l][j][i]+rate*layerErr[l+1][i]*layer[l][j];//隱含層動量調整

layer_weight[l][j][i]+=layer_weight_delta[l][j][i];//隱含層權重調整

if(j==layerErr[l].length-1){

layer_weight_delta[l][j+1][i]= mobp*layer_weight_delta[l][j+1][i]+rate*layerErr[l+1][i];//截距動量調整

layer_weight[l][j+1][i]+=layer_weight_delta[l][j+1][i];//截距權重調整

}

}

layerErr[l][j]=z*layer[l][j]*(1-layer[l][j]);//記錄誤差

}

}

}

public void train(double[] in, double[] tar){

double[] out = computeOut(in);

updateWeight(tar);

}

}

題目1:一個簡單的算法演示程序(JAVA語言實現)

1. 選擇一個算法（提供選擇見下），利用各種方法（圖形、動畫等）演示算法的演示過程。

2. 可以進行手動演示，也可以自動步進式演示。

3. 允許用戶設置算法的各個輸入參數，以及自動步進式演示中的時間間隔。

4. 不同的算法輸入要求見下。

界面要求：

1. 盡量使用圖形界面實現，要符合日常軟件使用規范來設計菜單和界面。

2. 如果無法實現圖形界面，則在命令行方式下也需要提供菜單，方便用戶操作。

其他要求：

1. 標識符命名遵循Windows命名規范。

2. 能夠注意各種異常處理，注重提高程序運行效率。

提交內容：

1. 全部源代碼。

2. 軟件設計和使用說明書（UML類圖；實現的功能、主要技術；使用幫助文檔）

參考算法：

1. 最小生成樹算法：Prim算法、Kruskal算法。允許以下方式輸入一個圖形：繪制圖形、輸入鄰接矩陣、輸入邊及其關聯的頂點。要求在圖形方式下進行演示算法執行步驟。

2. 單源最短路算法：Dijkstra算法。允許以下方式輸入一個圖形：繪制圖形、輸入鄰接矩陣、輸入邊及其關聯的頂點。要求在圖形方式下進行演示算法執行步驟。

3. 最優編碼算法：Huffman編碼算法。允許用戶輸入一段英文文字，或者打開一個txt文檔（英文內容），據此文檔內容進行編碼。要求動態列出每個字符的出現概率統計結果以及對應編碼。

4. 其他可供演示的具有一定難度的算法，如關鍵路徑問題、有向圖的極大連通分支等。

優先級調度算法如何用JAVA實現

沒java的 發段源代碼給你 有興趣自己慢慢理解

#include time.h

#include dos.h

#include math.h

#include conio.h

#include stdio.h

#include stdlib.h

#include time.h

#include graphics.h

#define ESC 0x1b

#define ENTER 0x0d

#define TRUE 1

#define FALSE 0

/*每隔TIME秒就變換一次優先級*/

#define TIME 5

/*數據結構*/

/****************************************************************/

enum _Status/*進程狀態枚舉*/

{

READY =0,/*就緒*/

RUN,/*執行中*/

SUSPEND,/*掛起*/

};

typedef enum _Status Status;

/****************************************************************/

struct _Pcb/*進程結構*/

{

int PID;/*進程ID，ID為負數的進程為系統后備隊列的作業*/

int Time;/*進程運行需要的時間*/

int Prior;/*進程的優先級，越大越優先*/

Status Sts;/*狀態*/

struct _Pcb *Next;/*指向本進程隊列中下個進程的PCB*/

};

typedef struct _Pcb PCB;

/****************************************************************/

struct _Batch/*多道處理中的道結構*/

{

PCB *pcb;/*該道當前正在處理的進程*/

struct _Batch *Next;/*下一道*/

};

typedef struct _Batch Batch;

/****************************************************************/

/*多道系統相關全局變量*/

PCB *ProcQueue = NULL;/*進程鏈表，按優先級從大到小排列*/

Batch *BatchQueue = NULL;/*系統多道鏈表*/

/****************************************************************/

/*動態優先權搶占式調度算法及相關函數聲明*/

/****************************************************************/

int InitBatchs(int n);/*初始化多道系統，n為道數*/

int InsertProc(int prior, int time);/*向進程鏈表中按優先級大小插入一個新進程*/

int InsertIDLE();/*向進程隊列中加入后備進程，當系統空閑時將被調入*/

int SortProcQueue();/*將進程鏈表按優先級從大到小排列*/

int AddBatch();/*增加系統道數*/

int DeleteBatch();/*減少系統道數*/

int UnSuspendProc(int id);/*解除ID為id的進程的掛起狀態*/

int UpdateBatchs();/*多道系統根據進程鏈表進行更新，并將執行完畢的進程刪除*/

int PassSeconds(int n);/*系統經過n秒后計算數據并進行優先級調度*/

/****************************************************************/

/*各函數的定義*/

/****************************************************************/

int InitBatchs(int n)

{

int i;

for (i=0; in; ++i)

{

AddBatch();

}

return (UpdateBatchs());

}

int InsertProc(int prior, int time)

{

static int sysid = 0;/*該系統已經加入過多少進程，此值將是新進程的ID*/

PCB *last,*now,*pcb;

pcb = (PCB*)malloc(sizeof(PCB));

if (pcb == NULL) return FALSE;

pcb-Prior = prior;

pcb-Time = time;

pcb-PID = (++sysid);

pcb-Sts = READY;

if (ProcQueue == NULL)/*如果進程隊列為空*/

{

ProcQueue = pcb;

pcb-Next = NULL;

return TRUE;

}

last = ProcQueue;

now = last-Next;

if (pcb-Prior last-Prior)/*pcb將排在隊頭*/

{

pcb-Next = ProcQueue;

ProcQueue = pcb;

return TRUE;

}

while ((now != NULL) (pcb-Prior now-Prior))/*尋找插入位置*/

{

last = now;

now = last-Next;

}

last-Next = pcb;

pcb-Next = now;

return TRUE;

}

int InsertIDLE()

{

PCB *now = ProcQueue;

PCB *idle = (PCB*)malloc(sizeof(PCB));

if (idle == NULL) return FALSE;

idle-PID = -1;

idle-Prior = -1;

idle-Sts = SUSPEND;

idle-Time = -1;

idle-Next = NULL;

if (ProcQueue == NULL)

{

ProcQueue = idle;

return TRUE;

}

while(now-Next != NULL)

{

now = now-Next;

}

now-Next = idle;

return TRUE;

}

int SortProcQueue()

{ /*冒泡排序*/

PCB *last, *now;

int b = FALSE;/*上次遍歷是否無交換產生*/

if (ProcQueue==NULL || ProcQueue-Next==NULL)/*如果鏈表中無進程或只有一個進程*/

return FALSE;

while (!b)

{

b = TRUE;

last=ProcQueue;

now=last-Next;

if (last-Prior now-Prior)

{

ProcQueue = now;

last-Next = now-Next;

now-Next = last;

b = FALSE;

last = ProcQueue;

now = last-Next;

}

while (now-Next!=NULL)

{

if ((now-Prior)(now-Next-Prior))

{

last-Next = now-Next;

now-Next = now-Next-Next;

last-Next-Next = now;

b = FALSE;

}

else

last = last-Next;

now = last-Next;

}

}

return TRUE;

}

int AddBatch()

{

Batch *bt = (Batch*)malloc(sizeof(Batch));

if (bt==NULL) return FALSE;

bt-Next = BatchQueue;

BatchQueue = bt;

bt-pcb = NULL;

return (InsertIDLE());

}

int DeleteBatch()

{

Batch *bt = BatchQueue;

PCB *last, *now;

if (BatchQueue==NULL || BatchQueue-Next==NULL)/*如果只剩最后一道則不刪除*/

return FALSE;

if (ProcQueue==NULL || ProcQueue-Next==NULL)/*如果只有最后一個后備空閑進程*/

return FALSE;/**/

last = ProcQueue;

now = last-Next;

while (now-Next != NULL)/*查找到最后一個進程，該進程必定是后備空閑進程*/

{

last = now;

now = last-Next;

}

if (now==NULL || now-PID=0)/*未查找到后備進程*/

return FALSE;/**/

free(now);

last-Next = NULL;

BatchQueue = BatchQueue-Next;

free(bt);

return TRUE;

}

int UnSuspendProc(int id)

{

PCB *now = ProcQueue;

if (ProcQueue==NULL) return FALSE;

while (now != NULL)

{

if (now-PID == id)

{

now-Sts = READY;

return TRUE;

}

}

return FALSE;

}

int UpdateBatchs()

{

Batch *bt = BatchQueue;

PCB *last = ProcQueue, *now;

while (bt != NULL)

{

bt-pcb = NULL;

bt = bt-Next;

}

if (ProcQueue == NULL) return TRUE;

while (last-Sts==RUN last-PID=0 last-Time=0)

{

ProcQueue = ProcQueue-Next;

free(last);

last = ProcQueue;

}

now = last-Next;

while (now != NULL)

{

if (now-Sts==RUN now-PID=0 now-Time=0)/*如果該進程是運行中的一般進程并已執行完畢*/

{

last-Next = now-Next;

free(now);

}

else

last = last-Next;

now = last-Next;

}

bt = BatchQueue;

now = ProcQueue;

while (bt != NULL now != NULL)

{

bt-pcb = now;

now-Sts = RUN;

bt = bt-Next;

now = now-Next;

}

while (now != NULL)

{

if (now-Sts == RUN)

{

now-Sts = SUSPEND;

}

now = now-Next;

}

return TRUE;

}

int PassSeconds(int n)

{

static int time = 0;

int i=0, ProcEnd = FALSE;

PCB *pcb = ProcQueue;

Batch *bt = BatchQueue;

if (bt == NULL) return FALSE;

time += n;

if (time=TIME)

{

i = time/TIME;/*經過多少時間段*/

time = time%TIME;

}

while (bt != NULL)/*更新進程運行時間*/

{

if (bt-pcb-PID=0)

{

bt-pcb-Time -= n;

if (bt-pcb-Time = 0)/*進程結束*/

{

ProcEnd = TRUE;

}

}

bt = bt-Next;

}

if (i 0)

{

while (pcb != NULL)/*更新進程優先權（動態優先權）*/

{

if (pcb-Sts == RUN pcb-PID=0)/*運行的進程優先權降低*/

{

pcb-Prior -= i;

if (pcb-Prior 0)

pcb-Prior = 0;

}

else if (pcb-Sts == SUSPEND pcb-PID=0)/*掛起的進程優先權升高*/

pcb-Prior += i;

pcb = pcb-Next;

}

}

if (i0)

SortProcQueue();/*如果優先級有變動則重新排序*/

if (ProcEnd || i0)

{

UpdateBatchs();/*更新多道進程*/

}

return TRUE;

}

/****************************************************************/

/*圖形界面相關函數*/

/****************************************************************/

/*表格的單位寬度和高度*/

#define WIDTH 64

#define HEIGHT 12

void *black=NULL;/*背景色方格，使用它擦出表格中的圖形*/

int InitGraph()/*初始化圖形界面*/

{

int GraphDriver; /* The Graphics device driver */

int GraphMode; /* The Graphics mode value */

int ErrorCode;

GraphDriver = DETECT; /* Request auto-detection */

initgraph( GraphDriver, GraphMode, "" );

ErrorCode = graphresult(); /* Read result of initialization*/

if( ErrorCode != grOk )

{ /* Error occured during init */

printf(" Graphics System Error: %s\n", grapherrormsg( ErrorCode ) );

getch();

return FALSE;

}

cleardevice();

black = (void*)malloc(imagesize(1,1,WIDTH-1,HEIGHT-1));

getimage(1,1,WIDTH-1,HEIGHT-1,black);

DrawFrame();

DrawData();

return TRUE;

}

int DrawFrame()/*畫邊框和表頭*/

{

settextjustify(CENTER_TEXT, CENTER_TEXT);

gprintf(320, HEIGHT/2-1, "Multi-Batch System Emulation");

settextjustify(LEFT_TEXT, TOP_TEXT);

moveto(0,HEIGHT);

lineto(0,479);

lineto(639,479);

lineto(639,HEIGHT);

lineto(0,HEIGHT);

line(WIDTH*4,HEIGHT,WIDTH*4,479);

line(WIDTH*7,HEIGHT,WIDTH*7,479);

line(0,HEIGHT*2,639,HEIGHT*2);

line(0,HEIGHT*3,639,HEIGHT*3);

gprintf(HEIGHT*0+2,HEIGHT*1+2,"System Batchs");/*系統多道列表頭*/

gprintf(HEIGHT*0+2,HEIGHT*2+2,"Batch");

gprintf(WIDTH*1+2,HEIGHT*2+2,"ProcID");

gprintf(WIDTH*2+2,HEIGHT*2+2,"Time");

gprintf(WIDTH*3+2,HEIGHT*2+2,"Prior");

gprintf(WIDTH*4+2,HEIGHT*1+2,"Suspended Processes");/*掛起隊列列表頭*/

gprintf(WIDTH*4+2,HEIGHT*2+2,"ProcID");

gprintf(WIDTH*5+2,HEIGHT*2+2,"Time");

gprintf(WIDTH*6+2,HEIGHT*2+2,"Prior");

gprintf(WIDTH*7+2,HEIGHT*1+2,"Ready Processes");/*就緒隊列列表頭*/

gprintf(WIDTH*7+2,HEIGHT*2+2,"ProcID");

gprintf(WIDTH*8+2,HEIGHT*2+2,"Time");

gprintf(WIDTH*9+2,HEIGHT*2+2,"Prior");

}

int DrawData()/*繪制系統數據*/

{

int numRun=0, numSus=0, numRed=0;/*運行掛起和就緒的進程各有多少*/

PCB* now = ProcQueue;

int x=0, y=0;

while (now != NULL)

{

switch(now-Sts)

{

case RUN:

x = WIDTH*1;

y = HEIGHT*(3+(numRun++));

break;

case SUSPEND:

x = WIDTH*4;

y = HEIGHT*(3+(numSus++));

break;

case READY:

x = WIDTH*7;

y = HEIGHT*(3+(numRed++));

break;

}

if (now-Sts==RUN)/*該進程為正在運行的進程*/

{

putimage(x-WIDTH+1,y+1,black,COPY_PUT);

gprintf(x-WIDTH+2,y+2,"%d",numRun);

}

if (now-PID=0)/*該進程不是后備進程*/

{

putimage(x+1,y+1,black,COPY_PUT);

gprintf(x+2,y+2,"%d",now-PID);

putimage(x+1+WIDTH,y+1,black,COPY_PUT);

gprintf(x+WIDTH+2,y+2,"%d",now-Time);

putimage(x+1+WIDTH*2,y+1,black,COPY_PUT);

gprintf(x+WIDTH*2+2,y+2,"%d",now-Prior);

}

else

{

putimage(x+1,y+1,black,COPY_PUT);

putimage(x+1+WIDTH,y+1,black,COPY_PUT);

putimage(x+1+WIDTH*2,y+1,black,COPY_PUT);

gprintf(x+2,y+2,"system idle process");

}

now = now-Next;

}

}

int DlgGetNum(char *buf,int l,int t,int r,int b,int gettime)

{

char ch;

int pos=0;

bar(l,t,r,b);

gprintf(l+10,t+5,"Add new Process");

if (gettime)

gprintf(l+10,t+20,"input the time:");

else

gprintf(l+10,t+20,"input the priority:");

while (1)

{

ch = getch();

if (ch == ENTER)/*如果輸入了回車鍵*/

{

if(pos!=0)/*如果位置不在第一位(回車鍵不準第一個輸入)*/

{

buf[pos]='\0';

break;

}

}

else if (ch='0' ch='9')

{

buf[pos++]=ch;

buf[pos]='\0';

}

else if (ch == ESC)

{

return FALSE;

}

else/*其他按鍵均按BackSpace處理*/

{

--pos;

buf[pos]='\0';

}

if (pos0)

{ pos=0; buf[pos]='\0';}

else if (pos4)/*最多輸入4位數*/

{ pos=4; buf[pos]='\0';}

bar(l,t+35,r,t+47);

gprintf(l+50,t+35,buf);

}

return TRUE;

}

int NewProcDlg()

{

int l=200,t=150,r=380,b=200,pos=0,prior=0,time=0;

char buf[5],ch;

PCB *pcb;

void* bg = (void*)malloc(imagesize(l,t,r,b));

getimage(l,t,r,b,bg);

setfillstyle(1,2);

flushall();

/*******輸入優先級**********/

if (!DlgGetNum(buf,l,t,r,b,FALSE))

goto exit;

prior = atoi(buf);

/*******輸入時間**********/

pos=0;

buf[pos]='\0';

if (!DlgGetNum(buf,l,t,r,b,TRUE))

goto exit;

time = atoi(buf);

InsertProc(prior, time);

exit:

putimage(l,t,bg,COPY_PUT);

free(bg);

return TRUE;

}

int gprintf( int xloc, int yloc, char *fmt, ... )/*圖形系統中的格式輸出*/

{

va_list argptr; /* Argument list pointer */

char str[140]; /* Buffer to build sting into */

int cnt; /* Result of SPRINTF for return */

va_start( argptr, format ); /* Initialize va_ functions */

cnt = vsprintf( str, fmt, argptr ); /* prints string to buffer */

outtextxy( xloc, yloc, str ); /* Send string in graphics mode */

va_end( argptr ); /* Close va_ functions */

return( cnt ); /* Return the conversion count */

}

/****************************************************************/

/*main函數*/

int main()

{

clock_t start=0, end=0;

char kb;

InitBatchs(3);/*初始化為3道系統*/

InitGraph();

while (1)

{

start = end = clock();

while (!kbhit())

{

start = clock();

if ((start-end)/18.2 = 1)/*時間過了一秒*/

{

start = end = clock();

PassSeconds(1);

cleardevice();

DrawFrame();

DrawData();

}

}

kb = getch();

switch (kb)

{

case ESC:

closegraph();

return 0;

case 'w':

AddBatch();

UpdateBatchs();

cleardevice();

DrawFrame();

DrawData();

break;

case 's':

DeleteBatch();

UpdateBatchs();

cleardevice();

DrawFrame();

DrawData();

break;

case 'i':

NewProcDlg();

UpdateBatchs();

DrawFrame();

DrawData();

break;

}

}

return 0;

}

這兩道題代碼怎么寫java？

創建一個名字為“ReportCard”的類，然后用下邊的內容全部替換掉，你會成為全班最亮的仔。

import java.util.HashMap;

/**

* 學生成績單

*/

public class ReportCard {

public static void main(String[] args) {

ReportCard reportCard = new ReportCard("張三", "070602213");

reportCard.set("語文", 80.0);

reportCard.set("數學", 59.5);

reportCard.set("英語", 66.0);

reportCard.set("java", 80, 99.0);

reportCard.set("數據庫", 80, 66.0);

reportCard.set("毛概", null);

System.out.println(reportCard.getStudentName() + "語文分數:" + reportCard.get("語文"));

System.out.println(reportCard.getStudentName() + "數學考核結果:" + (reportCard.isPassed("數學") ? "合格" : "不合格"));

System.out.println(reportCard.getStudentName() + "期末是否掛科：" + (reportCard.isAllPassed() ? "否" : "是"));

}

// 學生姓名

private String studentName;

// 學生學號

private String studentNumber;

// 成績單

private HashMapString, CourseResult cards = new HashMap();

public ReportCard() {

}

public ReportCard(String studentName, String studentNumber) {

this.studentName = studentName;

this.studentNumber = studentNumber;

}

public Double get(String courseName){

CourseResult courseResult = cards.get(courseName);

return courseResult == null ? Double.NaN : courseResult.getStudentScore();

}

public void set(String courseName, Double studentScore){

CourseResult courseResult = new CourseResult(courseName, studentScore);

cards.put(courseName, courseResult);

}

public void set(String courseName, double passMark, Double studentScore){

CourseResult courseResult = new CourseResult(courseName, passMark, studentScore);

cards.put(courseName, courseResult);

}

public boolean isPassed(String courseName){

return cards.get(courseName).isPassed();

}

public boolean isAllPassed(){

for(CourseResult cr : cards.values()){

if ( ! cr.isPassed()) {

return false;

}

}

return true;

}

public String getStudentName() {

return studentName;

}

public String getStudentNumber() {

return studentNumber;

}

public void setStudentName(String studentName) {

this.studentName = studentName;

}

public void setStudentNumber(String studentNumber) {

this.studentNumber = studentNumber;

}

/**

* 課程

*/

class Course{

// 課程名稱

protected String courseName;

// 及格分

protected double passMark = 60;

public Course(String courseName, Double passMark) {

this.courseName = courseName;

if ( passMark != null) {

this.passMark = passMark;

}

}

}

/**

* 課程成績

*/

class CourseResult extends Course{

// 學生成績

private Double studentScore;

public CourseResult(String courseName, Double studentScore) {

this(courseName, null, studentScore);

}

public CourseResult(String courseName, Double passMark, Double studentScore) {

super(courseName, passMark);

this.studentScore = studentScore == null ? Double.NaN : studentScore;

}

public boolean isPassed(){

return studentScore = passMark;

}

public String getCourseName() {

return courseName;

}

public double getPassMark() {

return passMark;

}

public Double getStudentScore() {

return studentScore;

}

}