java 程序设计

之前有人问过同样的问题，我回答的，你们是不是同一个系的，要做课程设计？我直接粘贴过来：

我自己写了一个简单的程序，可选择落子的先后顺序，重新开始，最后判断某一方是否为五子连珠。选择落子的先后顺序，只需定义一个boolean变量，每次切换取其反值；重制棋盘或重新开始就把棋盘重新绘制一遍；判断某一方是否为五子连珠，就判断某方的每个棋子，以它为中心与之紧邻的水平，垂直，左斜，右斜四个方向是否有五子连珠。用一个二维数组position存储棋盘上的棋子情况，position[x][y]=1,0,-1分别表示棋盘的第x行第y列下有黑子，无子，白子。源代码如下：

package comtest;

import javaawt;

import javautil;

import javaawtgeom;

import javaawtevent;

import javaxswing;

public class MyFiveChess {

public static void main(String[] args) {

JFrame f = new JFrame();

fsetDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

Dimension screenSize = ToolkitgetDefaultToolkit()getScreenSize();

int screenWidth = screenSizewidth;

int screenHeight = screenSizeheight;

fsetSize(screenWidth / 2, screenHeight / 2);

fsetLocation(screenWidth / 4, screenHeight / 4);

fsetTitle("FiveChess");

MyPanel panel = new MyPanel();

fadd(panel);

fsetVisible(true);

}

}

class MyPanel extends JPanel {

private static final int SIDELENGTH = 10;

private ArrayList<Ellipse2D> squares = new ArrayList<Ellipse2D>();;

private Ellipse2D current = null;

JButton jb = new JButton("重新开始");

JButton jb2 = new JButton("切换先手");

boolean isBlack;

boolean first = true;

boolean isOver;

int l = 16;

int n = 20;

int bx = 20;

int by = 20;

int[][] position = new int[n + 1][n + 1];

public MyPanel(){

jbaddActionListener(new MyActionHandler());

jb2addActionListener(new MyActionHandler());

addMouseListener(new MouseHandler());

addMouseMotionListener(new MouseMotionHandler());

add(jb);

add(jb2);

}

public void initMyPenal(){

squares = new ArrayList<Ellipse2D>();

current = null;

isBlack = first;

isOver = false;

position = new int[n + 1][n + 1];

for(int i = 0; i <= n; i++)

for(int j = 0; j <= n; j++)

position[i][j] = 0;

repaint();

}

public void paint(Graphics g) {

superpaint(g);

jbsetLocation(400,150);

jb2setLocation(400,200);

gsetColor(ColorRED);

gsetFont(new Font(null, FontBOLD, 20));

gdrawString((first "黑" : "白")+"方下子", 400, 100);

gsetColor(new Color(240, 210, 120));

gfillRect(bx - l, by - l, l (n + 2), l (n + 2));

gsetColor(ColorBLACK);

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

gdrawLine(bx, by + i l, bx + l n, by + i l);

gdrawLine(bx + i l, by, bx + i l, by + l n);

}

Graphics2D g2 = (Graphics2D)g;

isBlack = first;

for(Ellipse2D r : squares){

g2setColor(isBlack ColorBLACK : ColorWHITE);

g2fill(r);

isBlack = !isBlack;

}

if(isOver) {

gsetColor(ColorRED);

gsetFont(new Font("TimesRoman", FontBOLD, 60));

gdrawString((isBlack "白" : "黑") + "方获胜", 120, 200);

}

}

public Ellipse2D find(Point2D p){

for(Ellipse2D r : squares)

if(rcontains(p))

return r;

return null;

}

public void add(Point2D p) {

if(pgetX() > bx - l / 2 && pgetX() < bx + l n + l / 2 &&

pgetY() > by - l / 2 && pgetY() < by + l n + l / 2){

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

for (int j = 0; j <= n; j++) {

if(position[i][j] == 1 || position[i][j] == -1) continue;

current = new Ellipse2DDouble(bx + j l - l / 2,

by + i l - l / 2, l, l);

if (currentcontains(p)) {

position[i][j] = isBlack 1 : -1;

isOver = isWin(position, isBlack, i , j) true : false;

currentsetFrame(bx + j l - l / 2 + 1,

by + i l - l / 2 + 1, l - 2, l - 2);

squaresadd(current);

repaint();

return;

}

}

}

}

}

private class MouseHandler extends MouseAdapter{

public void mousePressed(MouseEvent event){

if(isOver) return;

current = find(eventgetPoint());

if(current == null)

add(eventgetPoint());

}

}

private class MyActionHandler implements ActionListener{

public void actionPerformed(ActionEvent e) {

String cmd=egetActionCommand();

if("重新开始"equals(cmd)){

initMyPenal();

}else if("切换先手"equals(cmd)){

initMyPenal();

first=!first;

}

}

}

private class MouseMotionHandler implements MouseMotionListener{

public void mouseMoved(MouseEvent event){

Rectangle r = new Rectangle(bx - l, by - l, l (n + 2), l (n + 2));

if(rcontains(eventgetPoint())){

setCursor(CursorgetPredefinedCursor(CursorCROSSHAIR_CURSOR));

}else setCursor(CursorgetDefaultCursor());

}

public void mouseDragged(MouseEvent event){}

}

public boolean isWin(int[][] state, boolean isBlack, int x, int y) {//四个方向中是否有五子连珠

return isCzWin(state, isBlack, x, y)

|| isSpWin(state, isBlack, x, y)

|| isYxWin(state, isBlack, x, y)

|| isZxWin(state, isBlack, x, y);

}

public boolean isCzWin(int[][] state, boolean isBlack, int x, int y) {//判断垂直方向是否有五子连珠

int n = 0;

int a = (x >= 4 x - 4 : 0);

int b = (x <= statelength - 5 x + 4 : statelength - 1);

for (int i = a; i <= b; i++)

if (state[i][y] == (isBlack 1: -1)) {

if (++n == 5) return true;

} else n = 0;

return false;

}

public boolean isSpWin(int[][] state, boolean isBlack, int x, int y) {//判断水平方向是否有五子连珠

int n = 0;

int a = (y >= 4 y - 4 : 0);

int b = (y <= state[0]length - 5 y + 4 : state[0]length - 1);

for (int i = a; i <= b; i++)

if (state[x][i] == (isBlack 1: -1)) {

if (++n == 5) return true;

} else n = 0;

return false;

}

public boolean isZxWin(int[][] state, boolean isBlack, int x, int y) {//判断左斜方向是否有五子连珠

int n = 1, a = x, b = y;

for (int i = 1; i <= 4 && a > 0 && b > 0; i++)

if (state[a - 1][b - 1] == (isBlack 1: -1)) {

n++; a--; b--;

} else break;

for (int i = 1; i <= 4 && x < statelength - 1 && y < state[0]length - 1; i++)

if (state[x + 1][y + 1] == (isBlack 1: -1)) {

n++; x++; y++;

} else break;

if (n >= 5) return true;

return false;

}

public boolean isYxWin(int[][] state, boolean isBlack, int x, int y) {//判断右斜方向是否有五子连珠

int n = 1, a = x, b = y;

for (int i = 1; i <= 4 && a > 0 && b < state[0]length - 1; i++)

if (state[a - 1][b + 1] == (isBlack 1: -1)) {

n++; a--; b++;

} else break;

for (int i = 1; i <= 4 && x < statelength - 1 && y > 0; i++)

if (state[x + 1][y - 1] == (isBlack 1: -1)) {

n++; x++; y--;

} else break;

if (n >= 5) return true;

return false;

}

}

比较简略，自己可以根据情况修改，改进改进！

//人接口

public interface Human {

void speak();

}

//教师类

public class Teacher implements Human {

public void speak() {

Systemoutprintln("speak");

}

public void teach() {

Systemoutprintln("teach");

}

}

//学生类

public class Student implements Human {

public void speak() {

Systemoutprintln("speak");

}

public void learn() {

Systemoutprintln("learn");

}

}

//测试类

class HumanTest {

@Test

void test() {

Teacher teacher=new Teacher();

Student stu=new Student();

teacherteach();

teacherspeak();

stulearn();

stuspeak();

}

}

运行结果：

teach

speak

learn

speak

package test;

import javaawt;

import javaawtevent;

import javautil;

import javaxswing;

class TestCalculator {

JFrame jf=new JFrame("calculator");

JPanel jp=new JPanel();

JPanel jpn=new JPanel();

JTextArea jta=new JTextArea(2,14);

JButton bt;

JButton reset=new JButton("Reset");

String s=new String("1234567890=+-/");

String numberOne="";

String numberTwo="";

double number=0d;

double result=0d;

char sign;

public TestCalculator() {

jfsetSize(250,300);

jpsetLayout(new GridLayout(4,4));

jtasetEditable(false);

ArrayList list=new ArrayList();

for(int i=0;i<16;i++){

bt=new JButton(scharAt(i)+"");

jpadd(bt);

listadd(bt);

}

jpnsetLayout(new FlowLayout());

jpnadd(jta);

jpnadd(reset);

jfadd(jpn,"North");

jfadd(jp);

jtasetEditable(false);

jfsetVisible(true);

jfsetDefaultCloseOperation(jfEXIT_ON_CLOSE);

resetaddActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

reSet();

}

});

Iterator it=listiterator();

while(ithasNext()){

final JButton o=(JButton)itnext();

oaddActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

/判断被点击的按钮所代表的String是不是数字0-9/

if(ogetText()matches("\\d")||ogetText()equals("")){

jtaappend(ogetText());

getNumberTwo(ogetText());

}else{

getNumberOne();

double number1;

double number2;

if(numberOneequals("")){

number1=0;

}else{

number1=DoubleparseDouble(numberOne);

}

if(numberTwoequals("")){

number2=number;

}else{

number2=DoubleparseDouble(numberTwo);

}

switch(sign){

case '+':result=number1+number2;break;

case '-':result=number1-number2;break;

case '':result=number1number2;break;

case '/':result=number1/number2;break;

case '=':break;

default :result=number1;

}

number=number2;

numberTwo="";

jtasetText(result+"");

getSign(ogetText());

if(!ogetText()equals("="))

jtaappend(ogetText());

}

}

});

}

}

public void getNumberTwo(String s){

numberTwo+=s;

// Systemoutprintln("numberTwo:"+numberTwo);

}

public void getNumberOne(){

if(result==0){

numberOne=numberTwo;

}else{

numberOne=result+"";

}

// Systemoutprintln("numberOne: "+numberOne);

}

public void getSign(String s){

sign=scharAt(0);

// Systemoutprintln("sign:"+sign);

}

public void reSet(){

numberOne="";

numberTwo="";

sign=0;

result=0;

jtasetText("");

}

}

public class Calculator2{

public static void main(String[] agrs){

TestCalculator calculator=new TestCalculator();

}

}

计算器代码，用swing做的

import javaappletApplet;

import javaawtFont;

import javaawtFontMetrics;

import javaawtGraphics;

import javaawtImage;public class Welcome extends Applet {

int pos = 0;

Image graph;

int w=0;

String str = "热烈欢迎2009届新生入学";

Font f = new Font("黑体", FontBOLD, 20);

public Welcome(){

FontMetrics fm = getFontMetrics(f);

w = fmstringWidth(str);

pos=w;

}

public void paint(Graphics g) {

gsetFont(f);

gdrawString(str, pos-w, 40);

try {

Threadsleep(100);

} catch (InterruptedException e) {

eprintStackTrace();

}

pos = pos + 5;

if (pos-w > getWidth())

pos = w;

repaint();

}

}

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