Chapter 6 science and art of java programming

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Package SixthCharter;/** File: Poker. java * --------------------------- * this is the first question in Chapter 6th * Author luoriver */import acm. program. *; import acm. util. *; public class Poker extends ConsoleProgram {public void run () {println ("this program is a random display of selected Poker"); while (true) {println (); int I = readInt (); showPoker (); if (I = 2) break;}/** display random poker cards */private void showPoker () {int num = rgen. nextInt (1, 13); // rgen. setSeed (2); switch (num) {case 1: print ("Ace"); break; case 11: print ("Jack"); break; case 12: print ("Queen"); break; case 13: print ("King"); break; default: print (num);} print (""); int color = rgen. nextInt (1, 4); switch (color) {case 1: print ("Spades"); break; case 2: print ("Diamonds"); break; case 3: print ("Clubs"); break; case 4: print ("Hearts"); break ;}} /* create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance ();}

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Package SixthCharter;/** File: TossCoin. java * --------------------------- * This is the 6th question in Chapter 1 * Author luoriver */import acm. program. *; import acm. util. *; public class TossCoin extends ConsoleProgram {public void run () {println ("this program throws a coin until three consecutive values appear, and displays the total number of times thrown: "); int toss_num = 0; // sets the checkpoint, whether the number of consecutive times int n = 0; while (n <CHECK_NUM) {tossCoin (); toss_num ++; if (tossCoin (). equals ("Head") {println ("Head"); n ++;} else {prin Tln ("Tails"); n = 0 ;}} println ("total run" + toss_num + "times. ");}/*** Here is the method for coin writing */private String tossCoin () {int n = rgen. nextInt (1, 2); return returnContent (n );} /*** here is the returned coin side * @ Head * @ Tails */private String returnContent (int num) {if (num = 1) {return "Head" ;}else {return "Tails" ;}}/* create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance (); private static final int CHECK_NUM = 3 ;}

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Package SixthCharter;/** File: ThrowDart. java * --------------------------- * This is the 6th question in Chapter 1 * Author luoriver */import acm. program. *; import acm. graphics. *; import acm. util. *; public class ThrowDart extends ConsoleProgram {public void run () {println ("this program uses the projection operator to simulate that the ratio of Square to circular area is an approximate PI value :"); double SquareArea = 4 * (R * R); double CircleArea = PI * (R * R); println ("the area ratio of the circle to the square" + CircleArea/SquareArea ); println ("+ throwDart (); // println (3.14/4); // throwDart ();} private double throwDart () {double circlenum = 0; double squarenum = 0; while (squarenum <ThrowNum) {double rx = rgen. nextDouble (-1.0, 1.0); double ry = rgen. nextDouble (-1.0, 1.0); // rgen. setSeed (2); if (rx * rx) + (ry * ry) <1) {circlenum ++; squarenum ++ ;} else {squarenum ++ ;}} println (); println ("the number of times cast in the circle is" + circlenum ); println ("the number of times cast in the square is" + squarenum); return circlenum/squarenum;}/* create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance (); // you can specify the number of times that a token is returned. private static final int ThrowNum = 10000; private static final double PI = 3.14; private static final double R = 1 ;}

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Package SixthCharter;/** File: Poker. java * --------------------------- * this is the first question in Chapter 6th * Author luoriver */import acm. program. *; import acm. util. *; public class HalfLife extends ConsoleProgram {public void run () {println ("this program is used to simulate the atomic half-life "); println ("There are" + RADIOACTIVE_ACTOM_NUM + "actom initially"); int left_num = week; int year = 0; while (left_num> 0) {int new_actom_num = Week (left_num ); left_num-= new_actom_num; year ++; println ("There are" + left_num + "actom at the end of year" + year); new_actom_num = 0 ;}} // defines the number of attenuation atoms. private int left_halflife_actom_num (int num) {int actom_num = 0; for (int I = num; I> 0; I --) {while (rgen. nextBoolean () {actom_num ++; break;} return actom_num;}/* create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance ();/*** defines the number of radioactive atoms * @ RADIOACTIVE_ACTOM_NUM */private static final int RADIOACTIVE_ACTOM_NUM = 10000 ;}

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Package SixthCharter;/** File: Poker. java * --------------------------- * This is the 6th question in Chapter 1 * Author luoriver */import acm. program. *; import java. util. upload; import acm. util. *; public class Bingo extends ConsoleProgram {public void run () {/** first, ask if you want to introduce the gambling rule. If you want to write and read the text later, it will not be replaced by a number, 1 indicates continuing. 2 indicates not playing */println (); int know_rules = readInt ("do you want to know the rules of gambling machine? 1 indicates you want to know about the rule. 2 indicates you already know the rule: "); if (know_rules = 1) {println (/*" there are too many contents. I didn't write it yet, let's take a look at the science and art pages of the Java language, "*/RULES);} println (" get started! Have a good time! "); Start_play ();} private void start_play () {int remain_money = CLIENT_INIT_MONEY; print_remain_money (remain_money); while (remain_money> 0) {remain_money --; if (remain_money = 0) {println ("");} String first_show = show_result (); // print ("111111" + first_show); String second_show = show_result (); // println ("22222" + first_show); String third_show = show_result (); // print ("333333333" + first_show);/* specify num = New partition (System. in); int n = num. nextInt (); */int n = readInt (); if (n = 2) break; // print_remain_money (remain_money); if (first_show.equals ("BAR ") & second_show.equals ("BAR") & third_show.equals ("BAR") {remain_money + = 250; println (first_show + "" + second_show + "" + third_show + "you win"); print_remain_money (remain_money);} else if (first_show.equals ("BELL ") & second_show.equals ("BELL ")&&( Third_show.equals ("BELL") | third_show.equals ("BAR") {remain_money + = 20; println (first_show + "" + second_show + "" + third_show + "you win"); print_remain_money (remain_money);} else if (first_show.equals ("PLUM ") & second_show.equals ("PLUM") & (third_show.equals ("PLUM") | third_show.equals ("BAR") {remain_money + = 14; println (first_show + "" + second_show + "" + third_show + "you win"); prin T_remain_money (remain_money);} else if (first_show.equals ("ORANGE") & second_show.equals ("ORANGE") & (third_show.equals ("ORANGE ") | third_show.equals ("BAR") {remain_money + = 10; println (first_show + "" + second_show + "" + third_show + "you win "); print_remain_money (remain_money);} else if (first_show.equals ("CHERY") & second_show.equals ("CHERY") & third_show.equals ("CHERY") {remain_money +; Println (first_show + "" + second_show + "" + third_show + "you win"); print_remain_money (remain_money);} else if (first_show.equals ("CHERY ") & second_show.equals ("CHERY") {remain_money + = 5; println (first_show + "" + second_show + "" + third_show + "you win "); print_remain_money (remain_money);} else if (first_show.equals ("CHERY") {remain_money + = 2; println (first_show + "" + second_show + "" + th Ird_show + "you win"); print_remain_money (remain_money);} else {println (first_show + "" + second_show + "" + third_show + "you loss "); print_remain_money (remain_money) ;}// print_remain_money (remain_money);} private void print_remain_money (int remain) {println ("you have $" + remain + "wowould you like to play? ");} Private String show_result () {int random_show = rgen. nextInt (1, 6); switch (random_show) {case 1: return "BAR"; case 2: return "LEMON"; case 3: return "ORANGE"; case 4: return "PLUM"; case 5: return "BELL"; default: return "CHERRY ";}} /** set the system to give the user initial money */private static final int CLIENT_INIT_MONEY = 50;/** create an instance variable for the random number generator */private RandomGenerator rgen = RandomGener Ator. getInstance (); private static final String RULES = "a typical gambling machine has three wheels and they rotate behind a narrow window. Every wheel is marked as CHERRY, LEMON, ORANGE, PLUM, BELL, and BAR. However, the window can only see one symbol of one wheel at a time. "+" The following shows a typical winning Mode and Its Related returns: "+" BAR -- pay $250 "+" BELL/BAR -- pay $20 "+" PLUM/BAR -- pay $14 "+" ORANGE-ORANGE -ORANGE/BAR -- pay $10 "+" CHERRY-CHERRY -- pay $7 "+" CHERRY--- pay $5 "+" CHERRY --- -- pay $2 ";};

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Package SixthCharter;/** File: Poker. java * --------------------------- * This is the 6th question in Chapter 1 * Author luoriver */import acm. program. *; import java. util. upload; import acm. util. *; public class Calculate extends ConsoleProgram {public void run () {int first = rgen. nextInt (0, 20); int second = rgen. nextInt (0, 20); sys_question (first, second);}/** method for defining a system issue */private void sys_question (int first, int second) {for (int I = 0; I <PROBLEM_NUM; I ++) {first = rgen. nextInt (0, 20); second = rgen. nextInt (0, 20); int sys_answer = first + second; if (sys_answer <= 20) {print (first + "+" + second + "= "); answer (sys_answer);} else {I -- ;}}/** define the student's answer Method */private void answer (int sys_answer) {int student_answer = readInt (); if (student_answer = sys_answer) {println (success () ;}else {for (int I = 0; I <ANSWER_NUM; I ++) {println ("Incorrect answer, please enter it again"); student_answer = readInt () ;}println ("The correct answer is" + sys_answer );}} /** show the encouragement information after entering the correct answer */private String success () {int n = rgen. nextInt (1, 3); switch (n) {case 1: return "You got it"; case 2: return "connect"; default: return "That's the answer" ;}}/** create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance ();/** defines the number of questions */private static final int PROBLEM_NUM = 5; /** define the number of student error answers */private static final int ANSWER_NUM = 3 ;}

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Package SixthCharter;/** File: Poker. java * --------------------------- * This is the 6th question in Chapter 1 * Author luoriver */import acm. program. *; import acm. util. *; public class NewPoker extends ConsoleProgram {public void run () {println ("this program is a random poker player"); int level = level (); string color = color (); Card show = new Card (level, color); println ("show class" + show); println (); print (show. toString (level, color);} public class Card {public Card (int level, String color) {println ("level is" + level + "color is" + color);} public String toString (int level, String color) {return "toString method:" + level + "color:" + color;} public int getLevel () {return level ();} public String getColor () {return color ();}/** display random poker cards */private void showPoker () {int num = rgen. nextInt (1, 13); // rgen. setSeed (2); switch (num) {case 1: print ("Ace"); break; case 11: print ("Jack"); break; case 12: print ("Queen"); break; case 13: print ("King"); break; default: print (num) ;}} private String color () {int color = rgen. nextInt (1, 4); switch (color) {case 1: // print ("Spades"); return "Spades"; case 2: // print ("Diamonds "); return "Diamonds"; case 3: // print ("Clubs"); return "Clubs"; default: // print ("Hearts"); return "Hearts ";}} private int level () {int n = rgen. nextInt (1, 4); switch (n) {case 1: return LEVEL1; case 2: return LEVEL2; case 3: return LEVEL3; default: return LEVEL4 ;} /* private void color () {int color = rgen. nextInt (1, 4); switch (color) {case 1: print ("Spades"); case 2: print ("Diamonds"); case 3: print ("Clubs "); case 4: print ("Hearts");} */}/* create an instance variable for the random number generator */private RandomGenerator rgen = RandomGenerator. getInstance ();/** define the color constant of poker */private static final String CLUBS = "CLUBS"; private static final String DIMONDS = "DIMONDS "; private static final String HEARTS = "HEARTS"; private static final String SPADES = "SPADES";/** define the value of a level constant */private static final int LEVEL1 = 1; private static final int LEVEL2 = 11; private static final int LEVEL3 = 12; private static final int LEVEL4 = 13 ;}

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Package SixthCharter; public class LibaryRecord {public LibaryRecord (String book_name, String author, int catalog_number, String publisher, int public_date, boolean isCurrent) {this. book_name = book_name; this. author = author; this. catalog_number = catalog_number; this. publisher = publisher; this. public_date = public_date; this. isCurrent = isCurrent;} public LibaryRecord (String book_name, String author, int catalog_number, String publisher, int public_date) {this. book_name = book_name; this. author = author; this. catalog_number = catalog_number; this. publisher = publisher; this. public_date = public_date; isCurrent = true;} public String getBookName () {return book_name;} public String getAuthor () {return author;} public int getCatalogNum () {return catalog_number ;} public String getPublisher () {return publisher;} public int getPublic_date () {return public_date;} public boolean getisCurrent () {return isCurrent;} public void setisCurrent (boolean isCurrent) {this. isCurrent = isCurrent;} @ Overridepublic String toString () {return "Book_name" + book_name + "author:" + author + "directory number: "+ catalog_number +" publisher "+ publisher +" publication year: "+ public_date +" current circulation: "+ isCurrent;}/** define the title */private String book_name; private String author; private int catalog_number; private String publisher; private int public_date; private boolean isCurrent ;}