class NoLowerLetterException extends Exception {
讓客戶滿意是我們工作的目標(biāo)，不斷超越客戶的期望值來自于我們對(duì)這個(gè)行業(yè)的熱愛。我們立志把好的技術(shù)通過有效、簡單的方式提供給客戶，將通過不懈努力成為客戶在信息化領(lǐng)域值得信任、有價(jià)值的長期合作伙伴，公司提供的服務(wù)項(xiàng)目有：域名與空間、雅安服務(wù)器托管、營銷軟件、網(wǎng)站建設(shè)、寬甸網(wǎng)站維護(hù)、網(wǎng)站推廣。
public NoLowerLetterException(String msg) {
super(msg);
}
}
class NoDigitException extends Exception {
public NoDigitException(String msg) {
super(msg);
}
}
class People {
void printLetter(char c) {
if (c = 'a' c = 'z') {
System.out.println(c);
} else {
try {
throw new NoLowerLetterException(String.valueOf(c));
} catch (NoLowerLetterException e) {
e.printStackTrace();
}
}
}
void printDigit(char c) {
if (c = '0' c = '9') {
System.out.println(c);
} else {
try {
throw new NoDigitException(String.valueOf(c));
} catch (NoDigitException e) {
e.printStackTrace();
}
}
}
}
public class ExceptionExample {
public static void main(String args[]) {
People people = new People();
for (int i = 0; i 128; i++) {
// 【代碼5】
// //將i轉(zhuǎn)換為char類型，執(zhí)行people.printLetter()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯(cuò)誤信息！
people.printLetter((char) i);
}
for (int i = 0; i 128; i++) {
// 【代碼6】 //將i轉(zhuǎn)換為char類型，執(zhí)行people. printDigit
// ()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯(cuò)誤信息！
people.printDigit((char) i);
}
}
}
表1. CheckerDrag.java
// CheckerDrag.javaimport java.awt.*;import java.awt.event.*;public class CheckerDrag extends java.applet.Applet{ // Dimension of checkerboard square. // 棋盤上每個(gè)小方格的尺寸 final static int SQUAREDIM = 40; // Dimension of checkerboard -- includes black outline. // 棋盤的尺寸 – 包括黑色的輪廓線 final static int BOARDDIM = 8 * SQUAREDIM + 2; // Dimension of checker -- 3/4 the dimension of a square. // 棋子的尺寸 – 方格尺寸的3/4 final static int CHECKERDIM = 3 * SQUAREDIM / 4; // Square colors are dark green or white. // 方格的顏色為深綠色或者白色 final static Color darkGreen = new Color (0, 128, 0); // Dragging flag -- set to true when user presses mouse button over checker // and cleared to false when user releases mouse button. // 拖動(dòng)標(biāo)記 --當(dāng)用戶在棋子上按下鼠標(biāo)按鍵時(shí)設(shè)為true， // 釋放鼠標(biāo)按鍵時(shí)設(shè)為false boolean inDrag = false; // Left coordinate of checkerboard's upper-left corner. // 棋盤左上角的左方向坐標(biāo) int boardx; // Top coordinate of checkerboard's upper-left corner. //棋盤左上角的上方向坐標(biāo) int boardy; // Left coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原點(diǎn)(左上角)的左方向坐標(biāo) int ox; // Top coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原點(diǎn)(左上角)的上方向坐標(biāo) int oy; // Left displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按鍵時(shí)的鼠標(biāo)坐標(biāo)與棋子矩形原點(diǎn)之間的左方向位移 int relx; // Top displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按鍵時(shí)的鼠標(biāo)坐標(biāo)與棋子矩形原點(diǎn)之間的上方向位移 int rely; // Width of applet drawing area. // applet繪圖區(qū)域的寬度 int width; // Height of applet drawing area. // applet繪圖區(qū)域的高度 int height; // Image buffer. // 圖像緩沖 Image imBuffer; // Graphics context associated with image buffer. // 圖像緩沖相關(guān)聯(lián)的圖形背景 Graphics imG; public void init () { // Obtain the size of the applet's drawing area. // 獲取applet繪圖區(qū)域的尺寸 width = getSize ().width; height = getSize ().height; // Create image buffer. // 創(chuàng)建圖像緩沖 imBuffer = createImage (width, height); // Retrieve graphics context associated with image buffer. // 取出圖像緩沖相關(guān)聯(lián)的圖形背景 imG = imBuffer.getGraphics (); // Initialize checkerboard's origin, so that board is centered. // 初始化棋盤的原點(diǎn)，使棋盤在屏幕上居中 boardx = (width - BOARDDIM) / 2 + 1; boardy = (height - BOARDDIM) / 2 + 1; // Initialize checker's rectangle's starting origin so that checker is // centered in the square located in the top row and second column from // the left. // 初始化棋子矩形的起始原點(diǎn)，使得棋子在第一行左數(shù)第二列的方格里居中 ox = boardx + SQUAREDIM + (SQUAREDIM - CHECKERDIM) / 2 + 1; oy = boardy + (SQUAREDIM - CHECKERDIM) / 2 + 1; // Attach a mouse listener to the applet. That listener listens for // mouse-button press and mouse-button release events. // 向applet添加一個(gè)用來監(jiān)聽鼠標(biāo)按鍵的按下和釋放事件的鼠標(biāo)監(jiān)聽器 addMouseListener (new MouseAdapter () { public void mousePressed (MouseEvent e) { // Obtain mouse coordinates at time of press. // 獲取按鍵時(shí)的鼠標(biāo)坐標(biāo) int x = e.getX (); int y = e.getY (); // If mouse is over draggable checker at time // of press (i.e., contains (x, y) returns // true), save distance between current mouse // coordinates and draggable checker origin // (which will always be positive) and set drag // flag to true (to indicate drag in progress). // 在按鍵時(shí)如果鼠標(biāo)位于可拖動(dòng)的棋子上方 // （也就是contains (x, y)返回true），則保存當(dāng)前 // 鼠標(biāo)坐標(biāo)與棋子的原點(diǎn)之間的距離（始終為正值）并且 // 將拖動(dòng)標(biāo)志設(shè)為true（用來表明正處在拖動(dòng)過程中） if (contains (x, y)) { relx = x - ox; rely = y - oy; inDrag = true; } } boolean contains (int x, int y) { // Calculate center of draggable checker. // 計(jì)算棋子的中心位置 int cox = ox + CHECKERDIM / 2; int coy = oy + CHECKERDIM / 2; // Return true if (x, y) locates with bounds // of draggable checker. CHECKERDIM / 2 is the // radius. // 如果(x, y)仍處于棋子范圍內(nèi)則返回true // CHECKERDIM / 2為半徑 return (cox - x) * (cox - x) + (coy - y) * (coy - y) CHECKERDIM / 2 * CHECKERDIM / 2; } public void mouseReleased (MouseEvent e) { // When mouse is released, clear inDrag (to // indicate no drag in progress) if inDrag is // already set. // 當(dāng)鼠標(biāo)按鍵被釋放時(shí)，如果inDrag已經(jīng)為true， // 則將其置為false（用來表明不在拖動(dòng)過程中） if (inDrag) inDrag = false; } }); // Attach a mouse motion listener to the applet. That listener listens // for mouse drag events. //向applet添加一個(gè)用來監(jiān)聽鼠標(biāo)拖動(dòng)事件的鼠標(biāo)運(yùn)動(dòng)監(jiān)聽器 addMouseMotionListener (new MouseMotionAdapter () { public void mouseDragged (MouseEvent e) { if (inDrag) { // Calculate draggable checker's new // origin (the upper-left corner of // the checker rectangle). // 計(jì)算棋子新的原點(diǎn)（棋子矩形的左上角） int tmpox = e.getX () - relx; int tmpoy = e.getY () - rely; // If the checker is not being moved // (at least partly) off board, // assign the previously calculated // origin (tmpox, tmpoy) as the // permanent origin (ox, oy), and // redraw the display area (with the // draggable checker at the new // coordinates). // 如果棋子（至少是棋子的一部分）沒有被 // 移出棋盤，則將之前計(jì)算的原點(diǎn) // (tmpox, tmpoy)賦值給永久性的原點(diǎn)(ox, oy)， // 并且刷新顯示區(qū)域（此時(shí)的棋子已經(jīng)位于新坐標(biāo)上） if (tmpox boardx tmpoy boardy tmpox + CHECKERDIM boardx + BOARDDIM tmpoy + CHECKERDIM boardy + BOARDDIM) { ox = tmpox; oy = tmpoy; repaint (); } } } }); } public void paint (Graphics g) { // Paint the checkerboard over which the checker will be dragged. // 在棋子將要被拖動(dòng)的位置上繪制棋盤 paintCheckerBoard (imG, boardx, boardy); // Paint the checker that will be dragged. // 繪制即將被拖動(dòng)的棋子 paintChecker (imG, ox, oy); // Draw contents of image buffer. // 繪制圖像緩沖的內(nèi)容 g.drawImage (imBuffer, 0, 0, this); } void paintChecker (Graphics g, int x, int y) { // Set checker shadow color. // 設(shè)置棋子陰影的顏色 g.setColor (Color.black); // Paint checker shadow. // 繪制棋子的陰影 g.fillOval (x, y, CHECKERDIM, CHECKERDIM); // Set checker color. // 設(shè)置棋子顏色 g.setColor (Color.red); // Paint checker. // 繪制棋子 g.fillOval (x, y, CHECKERDIM - CHECKERDIM / 13, CHECKERDIM - CHECKERDIM / 13); } void paintCheckerBoard (Graphics g, int x, int y) { // Paint checkerboard outline. // 繪制棋盤輪廓線 g.setColor (Color.black); g.drawRect (x, y, 8 * SQUAREDIM + 1, 8 * SQUAREDIM + 1); // Paint checkerboard. // 繪制棋盤 for (int row = 0; row 8; row++) { g.setColor (((row 1) != 0) ? darkGreen : Color.white); for (int col = 0; col 8; col++) { g.fillRect (x + 1 + col * SQUAREDIM, y + 1 + row * SQUAREDIM, SQUAREDIM, SQUAREDIM); g.setColor ((g.getColor () == darkGreen) ? Color.white : darkGreen); } } } // The AWT invokes the update() method in response to the repaint() method // calls that are made as a checker is dragged. The default implementation // of this method, which is inherited from the Container class, clears the // applet's drawing area to the background color prior to calling paint(). // This clearing followed by drawing causes flicker. CheckerDrag overrides // update() to prevent the background from being cleared, which eliminates // the flicker. // AWT調(diào)用了update()方法來響應(yīng)拖動(dòng)棋子時(shí)所調(diào)用的repaint()方法。該方法從 // Container類繼承的默認(rèn)實(shí)現(xiàn)會(huì)在調(diào)用paint()之前，將applet的繪圖區(qū)域清除 // 為背景色，這種繪制之后的清除就導(dǎo)致了閃爍。CheckerDrag重寫了update()來 // 防止背景被清除，從而消除了閃爍。 public void update (Graphics g) { paint (g); }}
Shape.java接口代碼
public interface Shape {
public static final double PI = 3.14d;
public double area();
}
Circle.java圓類代碼
public class Circle implements Shape {
private double radius;
public Circle(double radius) {
? this.radius = radius;
}
@Override
public double area() {
? return PI * this.radius * this.radius;
}
public double perimeter() {
? return 2 * PI * this.radius;
}
}
Cylinder.java圓柱體類代碼
public class Cylinder extends Circle {
private double height;
public Cylinder(double radius, double height) {
? super(radius);
? this.height = height;
}
public double area() {
? return 2 * super.area() + super.perimeter() * this.height;
}
public double volume() {
? return super.area() * this.height;
}
}
X5_3_6.java主類代碼
public class X5_3_6 {
public static void main(String[] args) {
? Circle cir1 = new Circle(5);
? System.out.println("圓的面積為：" + cir1.area());
? System.out.println("圓的周長為：" + cir1.perimeter());
? Cylinder cy1 = new Cylinder(10, 15);
? System.out.println("圓柱體的表面積為：" + cy1.area());
? System.out.println("圓柱體的體積為：" + cy1.volume());
}
}
上面是我寫的代碼，下圖是執(zhí)行結(jié)果，麻煩看一下，是否可以。
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(shù)組
JButton exitButton,resetButton,newlyButton; //退出，重列，重新開始按鈕
JLabel fractionLable=new JLabel("0"); //分?jǐn)?shù)標(biāo)簽
JButton firstButton,secondButton; //分別記錄兩次被選中的按鈕
int grid[][] = new int[8][7];//儲(chǔ)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(biāo)
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(diǎn)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(xì)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(gè)按鈕同行哪個(gè)按鈕為空
if (yj) { //如果第二個(gè)按鈕的Y坐標(biāo)大于空按鈕的Y坐標(biāo)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(cè)直到第一按鈕中間有沒有按鈕
if (grid[x][i]!=0) {
k=0;
break;
}
else{ k=1; } //K=1說明通過了第一次驗(yàn)證
}
if (k==1) {
linePassOne();
}
}
if (yj){ //如果第二個(gè)按鈕的Y坐標(biāo)小于空按鈕的Y坐標(biāo)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(cè)直到第一按鈕中間有沒有按鈕
if (grid[x][i]!=0){
k=0;
break;
}
else { k=1; }
}
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 { k=1; }
}
if (k==1) {
rowPassOne();
}
}
if (xi) {
for (j=x+1;j=i;j++ ) {
if (grid[j][y]!=0) {
k=0;
break;
}
else { k=1; }
}
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(cè)空按鈕之間有沒按鈕
if (grid[x0][i]!=0) {
k=0;
break;
}
else { k=2; } //K=2說明通過了第二次驗(yàn)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{ k=2; }
}
}
}
public void rowPassOne(){
if (x0i) {
for (j=x0-1;j=i ;j-- ) {
if (grid[j][y0]!=0) {
k=0;
break;
}
else { k=2; }
}
}
if (x0i) {
for (j=x0+1;j=i ;j++ ) {
if (grid[j][y0]!=0) {
k=0;
break;
}
else { k=2; }
}
}
}
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
基于JAVA的3D坦克游戲源代碼
JAVA猜數(shù)字小游戲源代碼
/*1、編寫一個(gè)猜數(shù)字的游戲，由電腦隨機(jī)產(chǎn)生一個(gè)100以內(nèi)的整數(shù)，讓用戶去猜，如果用戶猜的比電腦大，則輸出“大了，再小點(diǎn)！”，反之則輸出“小了，再大點(diǎn)！”，用戶總共只能猜十次，并根據(jù)用戶正確猜出答案所用的次數(shù)輸出相應(yīng)的信息，如：只用一次就猜對(duì)，輸出“你是個(gè)天才！”，八次才猜對(duì)，輸出“笨死了！”,如果十次還沒有猜對(duì)，則游戲結(jié)束！*/
import java.util.*;
import java.io.*;
public class CaiShu{
public static void main(String[] args) throws IOException{
Random a=new Random();
int num=a.nextInt(100);
System.out.println("請(qǐng)輸入一個(gè)100以內(nèi)的整數(shù)：");
for (int i=0;i=9;i++){
BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
String str=bf.readLine();
int shu=Integer.parseInt(str);
if (shunum)
System.out.println("輸入的數(shù)大了，輸小點(diǎn)的！");
else if (shunum)
System.out.println("輸入的數(shù)小了，輸大點(diǎn)的！");
else {
System.out.println("恭喜你，猜對(duì)了！");
if (i=2)
System.out.println("你真是個(gè)天才！");
else if (i=6)
System.out.println("還將就，你過關(guān)了！");
else if (i=8)
System.out.println("但是你還……真笨！");
else
System.out.println("你和豬沒有兩樣了！");
break;}
}
}
}
你好，按照你的要求補(bǔ)充的代碼如下
// 【代碼1】 // 實(shí)現(xiàn)totalSalesByYear( )方法
public double totalSalesByYear() {
return 5000;
}
// 【代碼2】 // 實(shí)現(xiàn)totalSalesByYear( )方法
public double totalSalesByYear() {
return 3000;
}
// 【代碼3】 // 實(shí)現(xiàn)totalSalesByYear( )方法
public double totalSalesByYear() {
return 1000;
}
// 【代碼4】 // 計(jì)算商店年銷售額totalSales
for (ComputeTotalSales good : goods) {
totalSales += good.totalSalesByYear();
}
重慶分公司
重慶分公司
