public class main {public static void main(String[] args) {Polygon[] shapes = new Polygon[3];shapes[0]shapes[1]shapes[2]= new Triangle(3.0,4.0,5.0);new Triangle(17.0,12.0,9.0);= new Rectangle(6.0,2.0);System.out.println("Shapes: ");for ( Polygon p : shapes ) {System.out.println(p);System.out.println("has area10+ p.area() ++ p. perimeter() );1112and perimeterSystem.out.println();}}13141516}Polygon Interface: Any class that inherits a Interface must implementthese methods.DON'T MAKE ANY CHANGES IN THIS FILEpublic interface Polygon {/*Calculates the area of the Polygon*/10public double area();1112/*Calculates the perimeter of the Polygon*/public double perimeter();} Create a class called Rectangle that implements the Polygon interfaceMust have a default constructor that sets:double: width = 1double: height = 1Must have another Constructor that takes in:double: width --> 1st argumentdouble: height --> 2nd argument10Must have setters and getters for width and height.double getWidth()double getHeight()void setHeight()1112131415void setWidth()1617Must have a tostring (test Provided)"String tostring()" should return the following:"Rectangle width & height: " + width + ", ▪1820heighte */import java.lang. Math;Create a class called Triangle that uses the Polygon interface;Assume this is a right triangledouble a, b, c;Must have a default constructor that sets:a = 311b = 412C = 5Must have a Constructor that takes in 3 variables:a --> 1st argumentb --> 2nd argumentC --> 3rd argumentMust have setters and getters for all the variablesdouble getA()void setA()19202223...24Must have a toString (test Provided)"String tostring()" Should return the following:"Triangle edge lengths: " + a + ", " +25262728

public interface Polygon { //declaring methods public double area(); public double perimeter(); }

Answered: public class main { public static void…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Convert this code to python.
s[0]=7;s[1]=0;s[2]=-12;s[3]=9;s[4]=10;s[5]=3;s[6]=6; the value of [s[6-s[5]]is:
Don't delete the code. Fix the error and make sure it runs. #include using namespace std; class Puzzle { public: char arr[4][4] // constructor Puzzle() { char arr[4][2] = {'f', 'k', 's','s'} {'b', 'j', 'o','u'} {'b', 'o', 'b', 'n'} {'x', 'y', 'w', 'y'} } // destructor ~Puzzle() { } // print method void print() { for (int i=0; i> word; if (p.search(word)) cout << "The word is found in the puzzle." << endl; else cout << "The word is not found in the puzzle." << endl; return 0; }
java program : Assume the following method is added to the ArrayStack class. What does this method do? public ArrayStack<E> Undefined() { int j = topOfStack; ArrayStack<E> st1= new ArrayStack<E>(topOfStack + 1); for(int i = 0; i < topOfStack + 1; i++) { st1.theData[j] = theData[i]; j-- ; } return st1; } The method will return a stack containing all the elements of “this” stack in the reverse order. The method will return a stack containing the alternative elements of “this” stack in the original order. The method will return a stack containing all the elements of “this” stack in the original order. The method will return a stack containing the alternative elements of “this” stack in the reverse order.
*JAVA* complete method Delete the largest valueremoveMax(); Delete the smallest valueremoveMin(); class BinarHeap<T> { int root; static int[] arr; static int size; public BinarHeap() { arr = new int[50]; size = 0; } public void insert(int val) { arr[++size] = val; bubbleUP(size); } public void bubbleUP(int i) { int parent = (i) / 2; while (i > 1 && arr[parent] > arr[i]) { int temp = arr[parent]; arr[parent] = arr[i]; arr[i] = temp; i = parent; } } public int retMin() { return arr[1]; } public void removeMin() { } public void removeMax() { } public void print() { for (int i = 0; i <= size; i++) { System.out.print( arr[i] + " "); } }} public class BinarH { public static void main(String[] args) { BinarHeap Heap1 = new BinarHeap();…
class Output{public static void main(String args[]){byte a[] = { 65, 66, 67, 68, 69, 70 };byte b[] = { 71, 72, 73, 74, 75, 76 };System.arraycopy(a , 0, b, 0, a.length);System.out.print(new String(a) + " " + new String(b));}} The output of the above Java code is ?
public class Main { static int findPosSum(int A[], int N) { if (N <= 0) return 0; { if(A[N-1]>0) return (findPosSum(A, N - 1) + A[N - 1]); else return findPosSum(A, N - 1); } } public static void main(String[] args) { int demo[] = { 11, -22, 33, -4, 25,12 }; System.out.println(findPosSum(demo, demo.length)); } } Consider the recursive function you wrote in the previous problem. Suppose the initial call to the function has an array of N elements, how many recursive calls will be made? How many statements are executed in each call? What is the total number of statements executed for all recursive calls? What is the big O for this function?
public class Test { } public static void main(String[] args) { String str = "Salom"; System.out.println(str.indexOf('t)); }
Please help fast
1 int[] a = new int[n]; 2 a[0] = 0; a[1] = 1; 3 int x = 0; 4 for (int i = 2; i < n; i++) { 5 x = 3 * (i-1) * (i-1); 6 x += 3 * i - 2; 7 a[i] = a[i-1] + x; 8 } The code can be simplified by replacing lines 5, 6, 7 with a single line of code. Write the single line of code below:
public class ArraySection { static void arraySection(int a[], int b[]) { int k = 0; int [] c = new int[a.length]; for(int i = 0; i < a.length; i++) { for(int j = 0; j < b.length; j++) if(a[i] == b[j]) c[k++] = a[i]; } for(int i = 0; i < k; i++) System.out.println(c[i]); System.out.println(); } public static void main(String[] args) { int a[] = { 1, 2, 3, 4, 5 }; int b[] = { 0, 2, 4,5 }; arraySection(a,b); }} Calculate the algorithm step number and algorithm time complexity of the above program?
using namespace std; int main() int i, m=0,n=4; float arr[100] (55,66,88,1); for(i=0; i

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