1. CS110D Programming Language I
Lab 2 : Java basics I
Computer Science Department
Fall 2017

2. Lab Exercise 1: program output
Lab Objectives:
In this lab, the student will practice:
Using System.out.print , System.out.println,
output text and characters to the command window.
Compiling and executing Java applications.
Writing and evaluating mathematical expressions
Debugging code
and System.out.printf to
Lab Exercise 1: program output
Problem Description
What is output by the following programs?
// Lab Exercise 1: hello.java
// Printing with multiple statements
public class Hello {
// main method begins execution of Java application public static void main( String args[] )
System.out.print("HELLO WORLD, "); System.out.println("I am a new programmer :)"); System.out.println("\"Programming is fun\""); System.out.printf("\"%s%s\"","Programming is ","fun");
} // end method main
} // end class hello
Output :

3. Output : // Lab Exercise 1: Math.java
// Computing and displaying the result of different expressions
public class Math {
// main method begins execution of Java application public static void main( String args[] )
System.out.print("((2-2) × 1×3) - 3/1.0= ");
System.out.println(((2-2)*1*3)-3/1.0); System.out.println("4.0*1="+4.0*1); System.out.println("4.0+1="+4.0+1); System.out.println("4.0+1="+(4.0+1));
} // end main
} // end class Math
Output :

4. Lab Exercise 2: debugging
Problem Description
The following code segments do not compile. Fix all the compilation errors so that the program will compile successfully. (4 errors in every code)
// Lab Exercise 2: information.java
// Printing with multiple statements
public class information {
// main method begins execution of Java application public static void main( String args[] );
System.out.print("My name is Ahmad); System.out.print();
}// end information class
Correct code:

5. Correct code: // Lab Exercise 2: hello.java
// Printing with a printing statement
public hello {
// main method begins execution of Java application public static void main( String args[] )
system.out.println("HELLO everybody!");
}// end hello class
Correct code:

6. Lab Exercise 3: calculate squares and cubes
Problem Description
Write an application that calculates and prints the squares and cubes of the integers from 0 to 5.
Sample output
Code Skelton:

7. Lab Exercise 4: Shape Problem Description Code Skelton:
Write java program that prints the following shape:
Code Skelton:

8. Assignment Problem(s)
Q1: More shape 1.
Write a program that it prints the shape. The should have a side containing 8 asterisks.
Code Skelton:

9. Q2: Program output Output:
What is the expected output of the following program:
// Lab.2 Q.2: Homework.java
// Program that prints the result of remainder operators
public class Homework2 {
public static void main (String args[])
System.out.print("The remainder of 40%7% 8="); System.out.println(40%7%8);
} // end main
} // end Homework2
Output: