Java Coding Exercises 1 - 7

对不起老师, 我的历史作品消失了, 我正要发送然后 link 不见了

抱歉

// Guys i can always come backkkkk!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 }

} public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PIublic static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y // Guys i can always come backkkkk!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PIublic static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y// return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y // Guys i can always come backkkkk!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 // theres 10000 lines of code package com.company; public class Main { private static final String AD = "BUY DIET WATER 100% NOT VEGAN" public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } else return -1; } public static void main(String[] args) { System.out.println(areaCaluculator(5.0)) System.out.println(areaCaluculator(-1)) System.out.println(areaCaluculator(5.0, 4.0)) System.out.println(areaCaluculator(-1, 4.0)) // } method overloading // Jerry work start public static double areaCaluculator (double width, double length) { if (width < 0 || length < 0) { return -1.0; } double area = width * length; return area; } public static double areaCaluculator (double radius) { if (radius <= 0) { return -1.0; } else { double circleArea = radius * radius * Math.PI return circleArea; } } //Jerry work end //"Hanghang Bought this line" //WHERE IS JERRY?????????????? //Hanghang land end Please eneter with caution public static double area(double radius) { if (radius < 0) { return -1.0; } double PI = Math.PI; double radiusOfCircle = radius * radius * PI; return radiusOfCircle; } public static double area(double x, double y) { if (x < 0) { double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PIublic static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y } public static double areaCaluculator (double radius){ if (radius > 0){ //This land is claimed by Knight Hanghang return radius * radius * Math.PI } else { return -1.0 } } public static double areaCaluculator (double x, double y){ if (radius > 0){ double rectangleCool = x * y return = x * y

Exercise 1

package com.company; public class Main { public static void main(String[] args) { System.out.println( toMPH(320)); printConversion(320); } public static long toMPH(double KMPH) { if (KMPH < 0) { return -1; } long milesPerHour = Math.round(KMPH / 1.6); return milesPerHour; } public static void printConversion(double KMPH){ if(KMPH < 0) { System.out.println("invalid value"); } else { long MPH = toMPH(KMPH); System.out.println(KMPH + " Kilometers Per Hour Is " + MPH + " Miles Per Hour"); } } }

Number 1

public class Main { public static void main(String[] args) { toMPH(1834832894); } public static long toMPH(double KMPH){ if (KMPH < 0) { return -1; } double ConversionRate = 1.6; long MPH = Math.round(KMPH / ConversionRate); System.out.println(KMPH + "Kilometers in Miles Is" + MPH + "Miles"); return MPH;

Number 2

For some reason this code didn't stick in form like the last one, so sorry about that but I hope you can still read it and same with the rest for some reason

package com.company;public class Main { public static void main(String[] args) { printMegaBytesAndKiloBytes(2500);} public static void printMegaBytesAndKiloBytes(int kiloBytes) { int ConversionRate = 1024; if (kiloBytes < 0) { System.out.println("Invalid value");} if (kiloBytes >= 0) { int MegaBytes = kiloBytes / ConversionRate; int RemainingKiloBytes = kiloBytes % ConversionRate;System.out.println(kiloBytes + "KB = " + MegaBytes + " MB and " + RemainingKiloBytes + " KB");} } }

Number 3

public class Main { public static void main(String[] args) { shouldWakeUp(true, 15);} public static boolean shouldWakeUp(boolean barking, int hourOfDay) { if ((hourOfDay < 8 || hourOfDay > 22) && barking) { return true;} else { return false;} } }

Number 4

I got a few errors in this one I just don't know where

also this one only printed in fully black, no orange but it stayed in form luckily { println("This program calculates leap year."); int year = readInt("Enter the year: "); boolean isLeapYear = ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0)); if (isLeapYear) { println(year + " is a leap year."); } else println(year + " is not a leap year."); } }

Number 5

public class Main { public static void main(String[] args) { areequalbythreedecimalplaces(2.3333, 2.3339);} public static void areEqualByThreeDecimalPlaces(double number1, double number2) { int number3 = (int) (number1 * 10000); int number4 = (int) (number2 * 10000); if (number3 == number4) { System.out.println("true");} else { System.out.println("false");} } }

Number 6

this one when I was copying and pasting also didn't keep the colour AND form

public class TeenNumberChecker { public static boolean hasTeen(int num1, int num2, int num3) { if ((number1 >= 13 && number1 <= 19) || (number2 >= 13 && number2 <= 19) || (number3 >= 13 && number3 <= 19)) { return true; } return false; } public static boolean isTeen(int num4) { if (num4 >= 13 && num4 <= 19) { return true; } return false; }}

package com.company; public class Main { public static void main(String[] args) { isTeen(14); hasTeen(14, 17, 90); } public static void hasTeen(int age1, int age2, int age3) { if ((age1 <= 19 && age2 <= 19 && age3 <= 19) || (age1 >= 13 && age2 >= 13 && age3 >=13)) { System.out.println("true"); } else { System.out.println("false"); } } public static void isTeen(int age1) { if (age1 < 20 && age1 > 12) { System.out.println("true"); } else { System.out.println("false"); } } }

package com.company; public class Main { public static void main(String[] args) { hasEqualSum(1, 2, 3); } public static void hasEqualSum(int number1, int number2, int answer) { if (number1 + number2 == answer) { System.out.println("true"); } else { System.out.println("false"); } } }

package com.company; public class Main { public static void main(String[] args) { areEqualByThreeDecimalPlaces(2.3333, 2.3339); } public static void areEqualByThreeDecimalPlaces(double number1, double number2) { int number3 = (int) (number1 * 1000); int number4 = (int) (number2 * 1000); if (number3 == number4) { System.out.println("true"); } else { System.out.println("false"); } } }

package com.company; public class Main { public static void main(String[] args) { isLeapYear(3454); } public static void isLeapYear(int year) { if (year < 1 && year > 9999) { System.out.println("false"); } else { if (year % 4 == 0) { System.out.println("Is leap year"); } else { System.out.println("Is not leap year"); } if (year % 100 == 0) { System.out.println("Divisible by 100"); } else { System.out.println("Not divisible ny 100"); } if (year % 4 == 0) { System.out.println("Divisible by 400"); } else { System.out.println("Not divisible by 400"); } } } }

package com.company; public class Main { public static void main(String[] args) { shouldWakeUp(true, 15); } public static boolean shouldWakeUp(boolean barking, int hourOfDay) { if ((hourOfDay < 8 || hourOfDay > 22) && barking) { return true; } else { return false; } } }

package com.company; public class Main { public static void main(String[] args) { printMegaBytesAndKiloBytes(2500); } public static void printMegaBytesAndKiloBytes(int kiloBytes) { int ConversionRate = 1024; if (kiloBytes < 0) { System.out.println("Invalid value"); } if (kiloBytes >= 0) { int MegaBytes = kiloBytes / ConversionRate; int RemainingKiloBytes = kiloBytes % ConversionRate; System.out.println(kiloBytes + "KB = " + MegaBytes + " MB and " + RemainingKiloBytes + " KB"); } } }

package com.company; public class Main { public static void main(String[] args) { PrintConversion(134.76); } public static long toMPH(double KMPH) { if (KMPH < 0) { return -1; } double ConversionRate = 1.6; long MPH = Math.round(KMPH / ConversionRate); return MPH; } public static void PrintConversion(double KMPH) { System.out.println(KMPH + " kilometers is " + toMPH(KMPH) + " in miles"); } }

Java Coding Exercise no. 7

package com.company; public class Main { public static boolean hasTeen(int numberOne, int numberTwo, int numberThree) { if (numberOne >= 13 && numberOne <= 19) { return true; } if (numberTwo >= 13 && numberTwo <= 19) { return true; } if (numberThree >= 13 && numberThree <= 19) { return true; } return false; } public static boolean isTeen (int number){ if (number >= 13 && number <= 19){ return true; } else return false; } public static void main(String[] args) { System.out.println(hasTeen(9, 99, 19)); System.out.println(hasTeen(25, 14, 42)); System.out.println(hasTeen(22, 23, 24)); System.out.println(isTeen(9)); System.out.println(isTeen(13)); } }

Java Coding Exercise no. 6

package com.company; public class Main { public static boolean hasEqualSum (int numberOne, int numberTwo, int numberThree){ if (numberOne + numberTwo == numberThree){ return true; } else return false; } public static void main(String[] args) { System.out.println(hasEqualSum(1, 1, 1)); System.out.println(hasEqualSum(1, 1, 2)); System.out</