RationalOperations

public class Animal { public static int population; private int age; } public Animal (int age) { this.age = age; population++; } + msg); public void say (String msg) { System.out.print("Saying: " System.out.print(" for "); System.out.print(getHuman Years()); System.out.println(" years."); } public int getHuman Years() { return age; } public class Mammal extends Animal { private String species; public Mammal(String species, int age) { super (age); this. species species; } } } = public int getHuman Years() { if (species.equals("dog")) 1 else return super.getHumanYears() * 7; return super.getHumanYears(); €

class Output{public static void main(String args[]){Integer i = new Integer(557);float x = i.floatValue();System.out.print(x);}}   What will the given code prints on the output screen.

public static void simpleLoop(int total) { String tmp = ""; for (int x = 0; x < total; x++) { tmp + (x + ","); } } } System.out.println(tmp.length()); public static void main(String[] args) { simpleLoop (2);

please

JAVA ONLY  public String cleanNumber(String phoneNumber)   {       int digit=0;     String result = "";    String number= "";    for (int i = 0; i < phoneNumber.length(); i++)    {        char ch = phoneNumber.charAt(i);        if (Character.isDigit(ch))        {            number = number + ch;            digit++;        }    }    if(digit == 10)        System.out.println("("+phoneNumber.substring(1,3)+")"+"-"+phoneNumber.substring(4,6)+phoneNumber.substring(7,10));    else        result = "Error";            return result;   }} Argument "(444) 999-1234" Actual (44)-) 99- "" Expected "(444) 999-1234"   "4449991234" (44)-99234 "" "(444) 999-1234"   "444.999.1234" (44)-99.12 "" "(444) 999-1234" What am doing wrong? How can I make the actual look like the expected? What do I have to change?

1- public class MathF{ public static void main(String[] args) { char[] grade=new char[4]; 4 grade[1]='B'; grade[3]='C'; Integer d1= new Integer(6); 7 Integer d2= new Integer(10); 8- if(d1!= d2){ System.out.println("grades do not match "); 10 System.out.println("Result: "+Math.sqrt(d1+d2)); 11 } 5 12 else 13- { System.out.println("Marks are same"); 14 for (int i=0;i<4;i++) System.out.println(grade[i]); } 16 }} Answer:

public static void main(String[] args) { int a; int b; int c; c = quad(0,1, 2); b = quad(1, 2, 3); a = quad(5, 6, 7); c = c +b+ a; } private static int quad(int a, int b, int c) { int r; r= a +b+ c; return r; } For the code above, how many entries does the activation record for method quad have? During the execution of main, at most how many activation records are existent on the run-time stack?

public class LabProgram {   public static void main(String args[]) {   Course course = new Course(); String first;  // first name       String last;   // last name       double gpa;    // grade point average              first = "Henry";       last = "Cabot";       gpa = 3.5;       course.addStudent(new Student(first, last, gpa));  // Add 1st student              first = "Brenda";       last = "Stern";       gpa = 2.0;       course.addStudent(new Student(first, last, gpa));  // Add 2nd student              first = "Jane";       last = "Flynn";       gpa = 3.9;       course.addStudent(new Student(first, last, gpa));  // Add 3rd student              first = "Lynda";       last = "Robison";       gpa = 3.2;       course.addStudent(new Student(first, last, gpa));  // Add 4th student   course.printRoster(); }     } // Class representing a student public class Student {   private String first;  // first name private String last;   // last name private double gpa;    // grade point average…

Trace through the following program and show the output. Show your work for partial credit. public class Employee { private static int empID = 1111l; private String name , position; double salary; public Employee(String name) { empID ++; this.name 3 пате; } public Employee(Employee obj) { empID = obj.empĪD; пате %3D оbj.naте; position = obj.position; %3D public void empPosition(String empPosition) {position = empPosition;} public void empSalary(double empSalary) { salary = empSalary;} public String toString() { return name + " "+empID + " "+ position +" $"+salary; public void setName(String empName){ name = empName;} public static void main(String args[]) { Employee empOne = new Employee("James Smith"), empTwo; %3D empOne.empPosition("Senior Software Engineer"); етрOпе.етpSalary(1000); System.out.println(empOne); еmpTwo empTwo.empPosition("CEO"); System.out.println(empOne); System.out.println(empTwo); %3D етpОпе empOne ;

public class Polygon { private double sideLength; private int sides; private String shape; public double getArea () { int n sides; double a sideLength; return ((a * a * n) / (4 * Math.tan((180 / n) 3.14159 / 180))); public void setPolygon (double sl, int sd, String sh) { sides-sd; sideLength-sl; shape=sh; public Polygon (double sl, int sd, String sh) ( sides-sd; sideLengthsl; shape=sh; public String getShape () { return (shape); } public int getSides () { return (sides); } public double getLength () { return (sideLength); } Write a static method named find that takes as a parameter an array of type Polygon named list. The method should print the shapes of each polygon that has an area greater than 500 and return their count. The method prototype is public static int find (Polygon [] list); Note: assume the array is already declared, populated with data in the main method and ready to be used.

public class Question1 {public static void main(String[] args) {double val;int counter = 0;int numIterations = 0;/*** Part a: Implement a branching condition that increases counter by 1 if val is larger than 0.5*/val = Math.random();/*** Part b: Add a loop around the code created in Part a that continues until counter equals 3.*//*** Part c: Use the variable numIterations to count how many times your loop in Part b iterates*/System.out.println("Number of Iterations until 3 random values greater than 0.5 were generated: "+ numIterations);}}

class TenNums {private:    int *p; public:    TenNums() {        p = new int[10];         for (int i = 0; i < 10; i++) p[i] = i;     }    void display() { for (int i = 0; i < 10; i++) cout << p[i] << " "; }};int main() {    TenNums a;      a.display();      TenNums b = a;      b.display();      return 0;} Continuing from Question 4, let's say I added the following overloaded operator method to the class. Which statement will invoke this method? TenNums TenNums::operator+(const TenNums& b) {  TenNums o;  for (int i = 0; i < 10; i++) o.p[i] = p[i] + b.p [i];  return o;} Group of answer choices TenNums a; TenNums b = a; TenNums c = a + b; TenNums c = a.add(b);