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Which of the following statements are valid in Java? (i) student1 = student2; (i) student1.set(student2.getName(), student2.getAge(), student2.getHeight(), student2.getWeight());

Which of the following statements are valid in Java? (i) student1 = student2; (i) student1.set(student2.getName(), student2.getAge(), student2.getHeight(), student2.getWeight());

Database System Concepts
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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Which of the following statements are valid in Java?

(i) student1 = student2;

(i) student1.set(student2.getName(), student2.getAge(), student2.getHeight(), student2.getWeight());

```java 50. Consider the following statements. public class Person { private String name; private int age; private double height; private double weight; public void set(String s, int a, double h, double w) { name = s; age = a; height = h; weight = w; } public String getName() { return name; } public int getAge() { return age; } public double getHeight() { return height; } public double getWeight() { return weight; } public String toString() { return (name + ", " + age + ", " + height + ", " + weight); } } Person student1 = new Person(); Person student2 = new Person("John", 22, 6.1, 175); String n; int a; double h, w; ``` ### Explanation This Java code defines a class named `Person` with four private attributes: `name`, `age`, `height`, and `weight`. The class includes several methods: - **Setter Method**: `set(String s, int a, double h, double w)` is used to set the values for the object's attributes. - **Getter Methods**: - `getName()`: Returns the name of the person. - `getAge()`: Returns the age of the person. - `getHeight()`: Returns the height of the person. - `getWeight()`: Returns the weight of the person. - **toString Method**: It returns a string representation of the person, showing the values of all attributes separated by commas. The code also demonstrates the creation of two `Person` objects, `student1` and `student2`. The second one is initialized with specific values: "John", 22, 6.1, and 175. Additionally, variables `n`, `a`, `h`, and `w` are declared for storing a `String`, an `int`, and two `doubles` respectively.
Transcribed Image Text:```java 50. Consider the following statements. public class Person { private String name; private int age; private double height; private double weight; public void set(String s, int a, double h, double w) { name = s; age = a; height = h; weight = w; } public String getName() { return name; } public int getAge() { return age; } public double getHeight() { return height; } public double getWeight() { return weight; } public String toString() { return (name + ", " + age + ", " + height + ", " + weight); } } Person student1 = new Person(); Person student2 = new Person("John", 22, 6.1, 175); String n; int a; double h, w; ``` ### Explanation This Java code defines a class named `Person` with four private attributes: `name`, `age`, `height`, and `weight`. The class includes several methods: - **Setter Method**: `set(String s, int a, double h, double w)` is used to set the values for the object's attributes. - **Getter Methods**: - `getName()`: Returns the name of the person. - `getAge()`: Returns the age of the person. - `getHeight()`: Returns the height of the person. - `getWeight()`: Returns the weight of the person. - **toString Method**: It returns a string representation of the person, showing the values of all attributes separated by commas. The code also demonstrates the creation of two `Person` objects, `student1` and `student2`. The second one is initialized with specific values: "John", 22, 6.1, and 175. Additionally, variables `n`, `a`, `h`, and `w` are declared for storing a `String`, an `int`, and two `doubles` respectively.
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