java

Write a complete Java program that prints out the following information:

1. Your Name in one line

2. The CRN and your email in one line.

Note:

Include the screenshot of your code and the output as a part of your answer. Otherwise, you will be marked zero for this question.

Answer:

The following program supposes to add two numbers and generates the following output.

Sum of these numbers:35

Unfortunately, the program has compile-time and run-time errors that prevent the program from running and producing the correct result. Using the table below, allocate the error(s) on each program line.

2 public static Void main(String[] args)

3 int num1 = 10

4 int num1 = 25;

5 int sum;

6 sum = num1 + num2;

7 System.outprintln("Sum of these numbers: "+sum);

8 }

9

Note:

Some of the answers are given to you as an example.

Table: compile-time / run-time error

Question Three

1 Marks

Learning Outcome(s):

LO1: Explain the basic principles of programming, concept of language. Universal constructs of programming languages.

Consider the following java class:

class Student { private int student_Number; private String student_Name; public Student(int stNo,String name) { student_Number=stNo; student_Name=name; } public String getName() { return student_Name; } public int getNumber() { return student_Number; } public void setName(String st_name) { student_Name = st_name; } }

a) What are the instance variables?

b) What are the local variables?

c) What are the accessor methods?

d) What is the mutator method?

Answer:

Question Four

1.5 Marks

Learning Outcome(s):

LO3: Demonstrate Integrated Development Environment (IDE) for the editing, building, debugging, and testing of programs. 

LO4: Develop a program based on specification using programming language elements including syntax, data types, conditional statement, control structures, procedures and arrays.

Consider the following java class:

public class Circle { private double radius; private String color; public Circle(){ radius=0; color = "red"; } public Circle(double r, String c){ radius=r; color = c

} public void setColor(String c){ color = c;

} public double getRadius(){ return radius; } public String getColor(){ return color; } }

Write a Tester class named CircleTester which contains the following instruction:

1. Use the first constructor to create a circle object c1 .

2. Use the second constructor to create a circle object c2 where radius =15, color = “Green”.

3. Use the setColor method to change the color of the circle c1 to ““Yellow”.

4. Print the radius and color of circle c2 .

Note:

Include the screenshot of the program output as a part of your answer. Otherwise, you will be marked zero for this question.

Answer: