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

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

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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First snippet public static void main(String[] args) { Dog aDog = new Dog("Max"); Dog oldDog = aDog; // we pass the object to foo foo(aDog); // aDog variable is still pointing to the "Max" dog when foo(...) returns aDog.getName().equals("Max"); // true aDog.getName().equals("Fifi"); // false aDog == oldDog; // true } public static void foo(Dog d) { d.getName().equals("Max"); // true // change d inside of foo() to point to a new Dog instance "Fifi" d = new Dog("Fifi"); d.getName().equals("Fifi"); // true } Second snippt public static void main(String[] args) { Dog aDog = new Dog("Max"); Dog oldDog = aDog; foo(aDog); // when foo(...) returns, the name of the dog has been changed to "Fifi" aDog.getName().equals("Fifi"); // true // but it is still the same dog: aDog == oldDog; // true } public static void foo(Dog d) { d.getName().equals("Max"); // true // this changes the name of d to be "Fifi" d.setName("Fifi"); } What is the difference between the first code snippet and the second?…
package citytech.calculator; public class Calculator { public static void main(String[]args) { System.out.println("Basic Calculator"); //declaring variable: //dataType variableName = value ; double num1 = 10.0; double num2 = 30.0; sum(num1, num2); multiply(num1, num2); } public static void sum(double n1, double n2) { double result = n1 + n2; System.out.println("Sum: "+result); } public static void multiply(double n1, double n2) { double result = n1 * n2; System.out.println("Multiply: "+result); } } Question: Please Check the Calculator app and add subtract and division methods
public class Ex08FanTest { public static void main (String[] args){ Ex08Fan fan1= new Ex08Fan(); Ex08Fan fan2= new Ex08Fan(); fan1.setOn(true); fan1.setSpeed(3); fan1.setRadius(10); fan1.setColor("yellow"); fan2.setOn(true); fan2.setSpeed(2); fan2.setRadius(5); fan2.setColor("blue"); fan2.setOn(false); System.out.println("Fan 1:\n" + fan1.toString()); System.out.println("\nFan 2:\n" + fan2.toString()); }}
using System; class Program { publicstaticvoid Main(string[] args) { int number = 1; while (number <= 88) { Console.WriteLine(number); number = number + 2; } Random r = new Random(); int randNo= r.Next(1,88); Console.WriteLine("Random Number between 1 and 88 is "+randNo); } } how would this program be modified to choose three random numbers instead of just one number between 1-88?
// This class discounts prices by 10% public class DebugFour4 { public static void main(String args[]) { final double DISCOUNT_RATE = 0.90; int price = 100; double price2 = 100.00; tenPercentOff(price DISCOUNT_RATE); tenPercentOff(price2 DISCOUNT_RATE); } public static void tenPercentOff(int p, final double DISCOUNT_RATE) { double newPrice = p * DISCOUNT_RATE; System.out.println("Ten percent off " + p); System.out.println(" New price is " + newPrice); } public static void tenPercentOff(double p, final double DISCOUNT_RATE) { double newPrice = p * DISCOUNT_RATE; System.out.println"Ten percent off " + p); System.out.println(" New price is " + newprice); } }
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public class Test { } public static void main(String[] args) { int a = 5; a += 5; } switch(a) { case 5: } System.out.print("5"); break; case 10: System.out.print("10"); System.out.print("0"); default:
2- Trace the following code and write the output: class Test1 { Test1(int x) { System.out.println("Test Calls " + x); class Test2 { Testi t1 = new Test1(10); Test2(int i) { t1 = new Test1(i); } public static void main(String[] args) { Test2 t2 = new Test2(5);
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