oadjing的专栏

/*2 3 5 7 11 101 131 151 181 191313 353 373 383 727 757 787 797 919 92910301 10501 10601 11311 11411 12421 12721 12821 13331 1383113931 14341 14741 15451 15551

/*p 2p - 12 33 75 317 12713 819117 13107119 52428731 2147483647*/public class MeiSenPrime { public static void main(String[] args) { int p2; System.out.println("p\t"

/*Enter the integers between 1 and 100: 2 5 6 5 4 3 23 43 2 02 occurs 2 times.3 occurs 1 times.4 occurs 1 times.5 occurs 2 times.6 occurs 1 times.23 occurs 1 times.43 occurs 1 times. */import

判断n是否为素数，可先求出n的平方根（squreRoot），然后n除以2 <= squreRoot之间的数字，不能整除即为素数。/*2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137

/*The random digits:--------------------------------2 5 9 9 1 9 2 7 0 19 2 4 2 7 5 4 5 6 12 4 7 8 1 7 6 8 2 95 5 9 9 2 5 2 2 5 66 9 2 2 1 9 6 2 1 32

输入一个整数，判断其是否为回文整数。

反向显示一个整数

/*22 42 4 82 4 8 162 4 8 16 322 4 8 16 32 64*/public class Test { public static void main(String[] args) { int i = 1; while (i <= 6) { method1(i, 2); i++; } } public

/*Enter a digit number: 3i m(i)1 0.52 1.16666666666666653 1.9166666666666665*/import java.util.Scanner;public class SumOrderedSeries { public static void main(String[] args) { Scan

/*What's 25-32 ? 556What's 34-13 ? 90What's 69-91 ? -22What's 66-86 ? 20What's 8-51 ? -43Correct count is: 2Test time is: 0 hour 8 minute 24 seconds25-32=556 wrong.34-13=90 wrong.69-91=-

/*Enter the number of the students: 4Enter 4 scores: 40 55 70 58Student 1 score is 40 and grade is: CStudent 2 score is 55 and grade is: BStudent 3 score is 70 and grade is: AStudent 4 score is 5

/*Enter a point with two coordinates: 2 7Point (2.0, 7.0) is not in the rectangle.Enter a point with two coordinates: 2 2Point (2.0, 2.0) is in the rectangle.*/import java.util.Scanner;public clas

/*Enter a point with two coordinates: 4 5Point (4.0, 5.0) is in the circle.Enter a point with two coordinates: 9 9Point (9.0, 9.0) is not in the circle.*/import java.util.Scanner;public class Poin

Enter your lottery pick (three digits): 124The lottery number is : 626Match one digit: you win $1,000

/*Enter two integer: 33 100They haven't any common divizor.Enter two integer: 100 330This greatest common divisor for 100 and 330 is 10Enter two integer: 222 123This greatest common divisor for 2

运行结果与书上不符以，疑为书籍排版错误。书上原题：m(i)=4(1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 +……+ 1/(2i-1) - 1/(2i+1))若i = 10,展开应为：m(i)=4(1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13 - 1/15 + 1/17 - 1/19 + 1/21）i m(i)10 3.232

public class MatrixZeroOne { public static void main(String[] args) { int randomNumber; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { randomNumber = (int)(Math.ran

/*13 17 31 37 71 73 79 97 107 113149 157 167 179 199 311 337 347 359 389701 709 733 739 743 751 761 769 907 937941 953 967 971 983 991 1009 1021 1031 10331061 1069 1091 1

/*You rolled 2 + 1 = 3You loseYou rolled 1 + 4 = 5Point is 5You rolled 5 + 1 = 6You rolled 5 + 1 = 6You rolled 1 + 5 = 6You rolled 6 + 3 = 9You rolled 1 + 4 = 5You winYou rolled 5 + 2 = 7You w

/*(3, 5)(5, 7)(11, 13)(17, 19)(29, 31)(41, 43)(59, 61)(71, 73)(101, 103)(107, 109)(137, 139)(149, 151)(179, 181)(191, 193)(197, 199)(227, 229)(239, 241)(269, 271)(281, 283)(311, 313

/*Current data and time is August 18, 2015 6:8:23.*/public class CurrentTime { public static void main(String[] args) { showTime(); } public static void showTime() { final

/*Enter a digit number: 234digit sum: 9brown:javacode brown$ java SumDigitsEnter a digit number: 1551digit sum: 12*/import java.util.Scanner;public class SumDigits { public static void main(Str

import java.util.Scanner;public class ReverseDigit { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter a digit number: "); int numbe

/*You rolled 5 + 5 = 10Point is 10You rolled 6 + 2 = 8Point is 8You rolled 5 + 2 = 7You lose1********************You rolled 3 + 3 = 6Point is 6You rolled 6 + 4 = 10You win2*****************

运行结果：Triangle: side1 = 1.0 side2 = 1.0 side3 = 1.0color: greenfilled: falseTriangle: side1 = 1.0 side2 = 1.5 side3 = 1.0color: yellowfilled: trueGeometricObject.javapackage Uber;public class Geom

解题思路： 1.先打印整张棋盘的边界线，‘|’与‘|’之间填充空格； 2. except数组存放棋盘上已经放置了Queen的下标，例如第一行Q的下标为1，则第二行Q的下标index !=1 && index != 1+2 && index != 1-2, && index != (0~16之间的偶数)，以此类推。/*|Q| | | | | | | || | | | | | |Q| || |

运行结果：br:javacode br$ javac NumberFormatException.javabr:javacode br$ java NumberFormatException 45 34Please use java NumberFormatException operand1 operator operand2java NumberFormatException 45x +

运行结果：Enter two digital number: tr ru hdInvalid digital number.Enter two digital number: 45 qaInvalid digital number.Enter two digital number: 12 1112 + 11 = 23InputException.javaimport java.util.I

运行结果：Enter the array's index less than 100: -5 q 111 9Out of bounds.Enter the array's index less than 100: qqIndex must be digital.Enter the array's index less than 100: 5Index 5: 144ArrayIndexOut

运行结果：brown:javacode br$ javac Where.javabrown:javacode br$ java Where miyu.txt xiyu.txt [(粉丝群)]-bash: syntax error near unexpected token `(' brown:javacode br$ java Where miyu.txt xiyu.txt 粉丝群brow

运行结果：Enter number n: 4Enter 4 rows of letters separated by spaces:A B C DB A D CC D B AD C A BThe input array is a Latin square.Enter number n: 3Enter 3 rows of letters separated by spaces:A F

运行结果：What is the capital of Alabama? MontogomeryThe correct answer should be Montgomery.What is the capital of Alaska? JuneauYour answer is correct.What is the capital of Arizona? PhoEnixThe corre

/*java CountUpperCase RollingInTheDeepThe uppercase total is: 4java CountUpperCase Rolling In The Deep Adele Steven Sharp Nelson Jon Schmidt.The uppercase total is: 10 */public class CountUpperCas

Enter your SSN: 123-45-666666 Invalid SSN. Enter your SSN: okl-33-4444 Invalid SSN. Enter your SSN: 123-45-6789 Valid SSN

书上要求用户输入两个字符串，检测第一个字符串是否是第二个字符串的子串，我的程序刚好相反。按书上的要求的话只要调用isSubstring(str1, str2)时改为isSubstring(str2, str1)即可。

Enter a number beteewn 0 and 511: 7H H HH H HT T T

Enter matrix1: 1 2 3 4 5 6 7 8 9Enter matrix2: 0 2 4 1 4.5 2.2 1.1 4.3 5.2The mattrices are multiplied as follows:5.3 23.9 24.011.6 56.3 58.217.9 88.7 92.4

/*Enter a string: almost lover 123a appers 1 time.e appers 1 time.l appers 2 times.m appers 1 time.o appers 2 times.r appers 1 time.s appers 1 time.t appers 1 time.v appers 1 time. */import

/*Enter a string: Joe going out, 78011 characters. */import java.util.Scanner;public class CountLetter { public static void main(String[] args) { Scanner input = new Scanner(System.in);

/*Enter a string: jdk.8.0.40 and the big bang 33594210 appers 2 times.1 appers 1 time.2 appers 1 time.3 appers 2 times.4 appers 2 times.5 appers 1 time.8 appers 1 time.9 appers 1 time. */imp