What is a package? What package is the Scanner class in? What package is the String class in?

Expert Solution

In java, packages are used for encapsulation. A set of related classes, interfaces or sub packages can be stored inside a package. They appear as folders when we see the project structure. Access of variables and methods can be controlled depening on the package.

Scanner class is present in java.util package. Scanner class is used for doing input/output operations.

String class is present in java.lang package

venereology answered 2 years ago

public static void main(String[] args) { Scanner input = new Scanner(System.in); String[]...

public static void main(String[] args) { Scanner input = new Scanner(System.in); String[] strings = new String[100]; for (int i = 0; i < strings.length; i++) { System.out.println("Enter Strings: stop "); strings[i]=input.nextLine(); if(strings[i].equalsIgnoreCase("stop")) break; } MaxLength(strings);//here is the error } public static int MaxLength(String[] array) { int max = array[0].length(); ...

------------------------------------------------------------------------------------ import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner input =...

------------------------------------------------------------------------------------ import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); int result = 0; System.out.print("Enter the first number: "); int x = input.nextInt(); System.out.print("Enter the second number: "); int y = input.nextInt(); System.out.println("operation type for + = 0"); System.out.println("operation type for - = 1"); System.out.println("operation type for * = 2"); System.out.print("Enter the operation type: "); int z = input.nextInt(); if(z==0){ result = x + y; System.out.println("The result is " + result); }else...

package mac286.LinkedLists; public class Postfix { private rStack<String> S; private String inSt; private ourLinkedList<String> inList, outList;...

package mac286.LinkedLists; public class Postfix { private rStack<String> S; private String inSt; private ourLinkedList<String> inList, outList; public Postfix(String s) { S = new rStack<String>(); inSt = s; outList = new ourLinkedList<String>(); inList = new ourLinkedList<String>(); } public void reset(String s) { S = new rStack<String>(); inSt = s; outList = new ourLinkedList<String>(); inList = new ourLinkedList<String>(); } private boolean isOperator(char c) { if(c=='-'||c=='+'||c=='*'||c=='/') return true; return false; } private boolean isParenthesis(char c) { if(c == '(' || c==')') return true;...

import java.util.Scanner; public class Squaring { public static void main(String[] args) { Scanner sc = new...

import java.util.Scanner; public class Squaring { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int num=0; String s = ""; while (true) { System.out.println("Enter an integer greater than 1: "); try { // reading input s = sc.nextLine(); // converting into int num = Integer.parseInt(s); break; } catch (Exception e) { System.out.println(s + " is not valid input."); } } // Now we have a valid number // putting into square int square = num; int count...

package compstore; public class Desktop{ private String brand; private float price; public Desktop(String brand, float price)...

package compstore; public class Desktop{ private String brand; private float price; public Desktop(String brand, float price) { this.brand = brand; this.price = price; } public String getBrand() { return brand; } public float getPrice() { return price; } } package compstore; public class DeskTopDeals{ // assume proper variables and other methods are here public void dealOfTheDay(Desktop[] items, int numItems){ /**************************** * your code would go here * ****************************/ } } Given the above Desktop class, write code that should go...

package construction; public class Bid{ private String contractor; private float price; public Bid(String contractor, float price)...

package construction; public class Bid{ private String contractor; private float price; public Bid(String contractor, float price) { this.contractor = contractor; this.price = price; } public String getContractor() { return contractor; } public float getPrice() { return price; } } package construction; public class ContractorBids{ // assume proper variables and other methods are here public void winningBid(Bid[] bids, int numBids){ /**************************** * your code would go here * ****************************/ } } You are doing renovations on your building, and multiple contractors...

package datastructure; public class UseQueue { public static void main(String[] args) { /* * Demonstrate how...

package datastructure; public class UseQueue { public static void main(String[] args) { /* * Demonstrate how to use Queue that includes add,peek,remove,pool elements. * Use For Each loop and while loop with Iterator to retrieve data. * */ } }

package datastructure; public class UseMap { public static void main(String[] args) { /* * Demonstrate how...

package datastructure; public class UseMap { public static void main(String[] args) { /* * Demonstrate how to use Map that includes storing and retrieving elements. * Add List<String> into a Map. Like, Map<String, List<string>> list = new HashMap<String, List<String>>(); * Use For Each loop and while loop with Iterator to retrieve data. * * Use any databases[MongoDB, Oracle, MySql] to store data and retrieve data. */ } }

QUESTION 11 In util package, public class Example { public static void showMessage( String s ){...

QUESTION 11 In util package, public class Example { public static void showMessage( String s ){ ....... } public static int getInt( String prompt ){ ....... } } Using these method you see above to create a main method in your class called MyExam in the different package to get input and output. The output will tell the user what number is entered. If you entered a 5, the output will be: "The number you entered is 5.". QUESTION 12...

import chapter6.date.SimpleDate; import java.util.Scanner; public class SimpleDateTestDefault { public static void main(String[] args) { Scanner stdin...

import chapter6.date.SimpleDate; import java.util.Scanner; public class SimpleDateTestDefault { public static void main(String[] args) { Scanner stdin = new Scanner(System.in); SimpleDate d1 = new SimpleDate(); SimpleDate d2 = new SimpleDate(stdin.nextInt(), stdin.nextInt(), stdin.nextInt()); System.out.println(d1); System.out.println(d2); System.out.println(d1.before(d2)); System.out.println(d2.before(d1)); } } Implement SimpleDate class in chapter6.date package with the following attributes: day, (int type, private) month, (int type, private) year (int type, private) The class should have the following methods: a constructor with three parameters: year, month, and day a constructor with no parameters which initialize the...

Question