In the context of programming, private refers to a visibility modifier that restricts access to certain variables or methods within a class. It means that only other members of the same class can access those private elements.
Think of a private party where only invited guests are allowed inside. Similarly, in programming, private elements are like exclusive areas that can only be accessed by members of the same class.
Public: Refers to a visibility modifier that allows unrestricted access to variables or methods from any part of the program.
Encapsulation: The concept of bundling data and methods together within a class and controlling their access using visibility modifiers like private.
Access Modifier: A keyword used in programming languages to define the accessibility level of classes, variables, or methods.
Consider the following class definition. public class Animal { private String species; private int age; private double weight; public Animal(String animalSpecies, int animalAge, double animalWeight) { species = animalSpecies; age = animalAge; weight = animalWeight; } public void eat() { weight += 5; } public double getWeight() { return weight; } } Assume that the following code segment appears in a class other than Animal. java Copy code Animal dog = new Animal("Dog", 3, 15); dog.eat(); System.out.println(dog.getWeight()); What is printed as a result of executing the code segment?
Consider the following class definition: public class Student { private String name; private int age; private String major; public Student(String studentName, int studentAge, String studentMajor) { name = studentName; age = studentAge; major = studentMajor; } public String getName() { return name; } public int getAge() { return age; } public String getMajor() { return major; } } Assume that the following code segment appears in a class other than Student: Student student = new Student("Alice", 19, "Computer Science"); String name = student.getName(); int age = student.getAge(); String major = student.getMajor(); System.out.println(name + " is " + age + " years old and majoring in " + major + "."); What is printed as a result of executing the code segment?
Consider the following superclass and subclass declarations: ```java public class Shape { private String color; public Shape(String color) { this.color = color; } public String getColor() { return color; } } public class Circle extends Shape { private double radius; public Circle(String color, double radius) { // Circle constructor implementation goes here } } ```
Why does the following code not compile? public class Student { private int gpa; public getGPA() { return gpa; } // Constructor not shown }
How can we fix the following class so it compiles? public class Weather { private int currentTemp; public Weather(int temp) { currentTemp = temp; } public void resetTemp() { currentTemp = newTemp; } }
Why does the following class does not compile? public class Weather { private int currentTemp; public Weather(int temp) { currentTemp = temp; } public void resetTemp(double newTemp) { currentTemp = newTemp; } }
Which of the following lines of code properly declare a private static variable called "name"?
Why does the following example class not compile? class ClassName { private String variableName; public static void methodName() { variableName = "exampleString"; } // Constructor not shown }
What output do we get if we run the following code? class X { private int a; private int y; public X() { this.a = 5; } public X(int y) { this(); this.y = y; System.out.print(a); System.out.print(this.y); } } public class Z { public static void main(String[] args) { X x = new X(3); } }
Does the following code compile successfully? ```java class X { private int a; private int y; public X() { this.a = 10; } public X(int y) { this(); this.y = y * 10; System.out.print(this.a + " "); System.out.print(this.y + " "); } } public class Z { public static void main(String[] args) { X x = new X(5); } } ```
What is the output of the following code? ```java class X { private int a; private int y; public X() { a = 15; } public X(int y) { this(); X.y = y; System.out.print(this.a + " "); System.out.print(this.y + " "); } } public class Z { public static void main(String[] args) { X x = new X(5); } } ```
What output do we get if we run the following code? ```java class X { private int a; private int y; public X() { this.a = 3; } public X(int y) { this("z"); this.y = y; System.out.print(this.a + " "); System.out.print(this.y + " "); } } public class Z { public static void main(String[] args) { X x = new X(7); } } ```
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