java 制作抽奖小程序

帮你做了一个，不知是否满意呢？

import javaappletApplet;

import javaawtButton;

import javaawtColor;

import javaawtGraphics;

import javaawtTextField;

import javaawteventActionEvent;

import javautilRandom;

import javautilVector;

public class Lottery extends Applet {

private static final long serialVersionUID = 1L;

int w,h;

Button ok,out,setup;

String[] msg;

TextField[] gaiLv;

TextField[] jiangPin;

int mx,ml;

int maxNum;

Random ran;

Vector<Integer> fist;

Vector<Integer> sec;

Vector<Integer> third;

Vector<Integer> lucky;

boolean lot=false;

boolean iserr=false;

boolean issetup=false;

String mesg="输入错误";

String priseMsg="继续努力！";

public void init(){

w=400;

h=220;

mx=20;

ml=40;

ran=new Random();

thissetSize(w, h);

thissetLayout(null);

ok=new Button("抽奖");

out=new Button("退出");

setup=new Button("确认设置");

msg=new String[4];

msg[0]="一等奖";

msg[1]="二等奖";

msg[2]="三等奖";

msg[3]="幸运奖";

gaiLv=new TextField[4];

jiangPin=new TextField[4];

for(int i=0;i<4;i++){

gaiLv[i]=new TextField("00"+(i+1));

thisadd(gaiLv[i]);

gaiLv[i]setBounds(mx+ml, 75+i26, 60, 18);

jiangPin[i]=new TextField();

thisadd(jiangPin[i]);

jiangPin[i]setBounds(mx+ml3, 75+i26, 80, 18);

}

thisadd(ok);

oksetBounds(260, 180, 60, 28);

okaddActionListener(new LotButtonAction(this));

thisadd(out);

outsetBounds(330, 180, 60, 28);

outaddActionListener(new LotButtonAction(this));

thisadd(setup);

setupsetBounds(110, 180, 80, 24);

setupaddActionListener(new LotButtonAction(this));

}

public void paint(Graphics g){

gsetColor(Colorwhite);

gfillRect(0, 0, thisgetWidth(), thisgetHeight());

gsetColor(new Color(230,255,230));

gfillRect(0, 0, w, 30);

gsetColor(ColorBLUE);

gdrawString("JAVA抽奖系统", 130, 20);

gsetColor(ColorORANGE);

gdrawRect(10, 40, 230, 170);

gsetColor(ColorBLACK);

gdrawString("设置", mx, 60);

gdrawString("概率", mx+ml, 60);

gdrawString("奖品", mx+ml3, 60);

for(int i=0;i<msglength;i++){

gsetColor(new Color(255-(i30),45,89));

gdrawString(msg[i], 20, 90+i26);

}

if(lot==true){

gsetColor(new Color(rannextInt(255),rannextInt(255),rannextInt(255)));

if(priseMsglength()<=7){

gdrawString(priseMsg, 260, 100);

}else{

gdrawString(priseMsgsubstring(0, 5), 260, 100);

gdrawString(priseMsgsubstring(5), 260, 120);

}

}

if(iserr==true){

gdrawString(mesg, 260, 100);

}

}

public void getLucky(){

float firu=1;

float secu=1;

float thiu=1;

float fouu=1;

float minu=1;

if(gaiLv[0]getText()trim()length()>1){

firu=FloatparseFloat(gaiLv[0]getText());

if(firu<=0||firu>=1){

iserr=true;

return;

}

if(firu<minu){

minu=firu;

}

}

if(gaiLv[1]getText()trim()length()>1){

secu=FloatparseFloat(gaiLv[1]getText());

if(secu<=0||secu>=1){

iserr=true;

return;

}

if(secu<minu){

minu=secu;

}

}

if(gaiLv[2]getText()trim()length()>1){

thiu=FloatparseFloat(gaiLv[2]getText());

if(thiu<=0||thiu>=1){

iserr=true;

return;

}

if(thiu<minu){

minu=thiu;

}

}

if(gaiLv[3]getText()trim()length()>1){

fouu=FloatparseFloat(gaiLv[3]getText());

if(fouu<=0||fouu>=1){

iserr=true;

return;

}

if(fouu<minu){

minu=fouu;

}

}

if(minu>=1||minu<=0){

iserr=true;

return;

}

float aNum=1/minu;

maxNum=(int)aNum;

int count=(int)(firu/minu);

if(firu!=1){

fist=getLotteryVec(maxNum,count);

}else{

fistremoveAllElements();

}

count=(int)(secu/minu);

if(secu!=1){

sec=getLotteryVec(maxNum,count);

}else{

secremoveAllElements();

}

count=(int)(thiu/minu);

if(thiu!=1){

third=getLotteryVec(maxNum,count);

}else{

thirdremoveAllElements();

}

count=(int)(fouu/minu);

if(fouu!=1){

lucky=getLotteryVec(maxNum,count);

}else{

luckyremoveAllElements();

}

issetup=true;

iserr=false;

}

protected Vector<Integer> getLotteryVec(int maxNum,int num){

Vector<Integer> result=new Vector<Integer>();

for(int i=0;i<num;i++){

resultadd(rannextInt(maxNum));

}

return result;

}

protected int getaNum(){

return rannextInt(maxNum);

}

public int isLucky(int pNum){

for(int i=0;i<fistsize();i++){

if(fistget(i)==pNum){

return 1;

}

}

for(int i=0;i<secsize();i++){

if(secget(i)==pNum){

return 2;

}

}

for(int i=0;i<thirdsize();i++){

if(thirdget(i)==pNum){

return 3;

}

}

for(int i=0;i<luckysize();i++){

if(luckyget(i)==pNum){

return 4;

}

}

return -1;

}

public void ButtonActionPerformed(ActionEvent e){

String acName=egetActionCommand();

if(acNameequals("抽奖")){

if(issetup==false){

priseMsg="请先设置参数！";

lot=true;

repaint();

lot=false;

return;

}

lot=true;

priseMsg=getResult(getaNum());

repaint();

// lot=false;

}else if(acNameequals("退出")){

thissetVisible(false);

thisstop();

thisdestroy();

Systemexit(0);

}else if(acNameequals("确认设置")){

lot=false;

getLucky();

repaint();

}

}

public String getResult(int num){

int resu=isLucky(num);

String result="";

switch(resu){

case -1:

result="继续努力！";

break;

case 1:

result="恭喜你！一等奖!\n获得"+jiangPin[0]getText();

break;

case 2:

result="恭喜你！二等奖!\n获得"+jiangPin[1]getText();

break;

case 3:

result="恭喜你！三等奖!\n获得"+jiangPin[2]getText();

break;

case 4:

result="恭喜你！幸运奖!\n获得"+jiangPin[3]getText();

break;

default:

result="继续努力！";

}

return result+num;

}

}

class LotButtonAction implements javaawteventActionListener{

Lottery su;

public LotButtonAction(Lottery bun){

thissu=bun;

}

@Override

public void actionPerformed(ActionEvent e) {

suButtonActionPerformed(e);

}

}

你等我，我来写！

要加注释吗？txt文件也贴给你吧。

import javaioFile;

import javaioFileInputStream;

public class Test {

private static int excellentNum;

private static int goodNum;

private static int passNum;

private static int failNum;

private static int totalNum;

public static void count() {

String str = readFile();

String[] records = strsplit("\n");

totalNum = recordslength;

for(int i = 0; i < totalNum; i++) {

String[] record = records[i]split(" ");

String[] scoreStr = record[recordlength -1]split("\r");

int score = IntegerparseInt(scoreStr[0]);

if(score >= 90) {

excellentNum++;

}else if(score >= 70) {

goodNum++;

}

if(score >= 60) {

passNum++;

}else {

failNum++;

}

}

}

public static void countExcellent() {

Systemoutprintln("优秀率是： " + (float)excellentNum/totalNum100 + "%");

}

public static void countGood() {

Systemoutprintln("良好率是： " + (float)goodNum/totalNum100 + "%");

}

public static void countPass() {

Systemoutprintln("及格率是： " + (float)passNum/totalNum100 + "%");

}

public static void countFail() {

Systemoutprintln("不及格率是： " + (float)failNum/totalNum100 + "%");

}

public static String readFile() {

File file = new File("D:\\scoretxt");

StringBuffer sb = new StringBuffer();

try {

FileInputStream fis = new FileInputStream(file);

byte[] b = new byte[1024];

int length = 0;

while(fisavailable() > 0) {

length = fisread(b);

String str = new String(b, 0, length);

sbappend(str);

}

} catch (Exception e) {

eprintStackTrace();

}

return sbtoString();

}

public static void main(String[] args) {

count();

countExcellent();

countGood();

countPass();

countFail();

}

}

--------------------------------------

scoretxt

001 小明 90

002 小伟 38

004 好地方 80

005 小明 90

006 小伟 38

007 好地方 80

008 小明 90

009 小伟 38

010 好地方 80

001 小明 90

011 小伟 38

012 好地方 80

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