Solutions

Exercise 1

import java.io.*;

public class Exercise1
{
    public static void main (String argv[])
    {
        System.out.println("My name is:");
        System.out.println("Bob Hartley");
        System.out.println("and I'm learning Java.");
    }
}

Exercise 2

import java.io.*;

public class Exercise2
{
    public static void main (String argv[])
    {
        System.out.println("My name is:\nBob Hartley\nandI'm learning Java.");
    }
}

Exercise 3

import java.io.*;

public class Exercise3
{
    public static void main (String argv[])
    {
        String name;
        double price;
        boolean in_stock;
        int group_number;

        name="Gone With the Wind";
        price=2.15;
        in_stock=true;
        group_number=3;

        System.out.println(name);
        System.out.println("Rents for: $" + price);
        System.out.println("In stock: " + in_stock);
        System.out.println("Group: " + group_number);
    }
}

Exercise 4

answers will vary

Exercise 5

import java.io.*;

public class Exercise5
{
    public static void main (String argv[])
    {
       double x, y;
       x=3;
       y=6;
       System.out.println(x + " + " + y + " = " + (x+y));
       System.out.println(x + " - " + y + " = " + (x-y));
       System.out.println(x + " * " + y + " = " + (x*y));
       System.out.println(x + " / " + y + " = " + (x/y));
    }
}

Exercise 6

import java.io.*;

public class Exercise6
{
       public static void main (String argv[])
       {
double x, y;
x=3;
y=6;
System.out.println(x + " + " + y + " = " + (x+y));
x++;
System.out.println(x + " - " + y + " = " + (x-y));
x--;
System.out.println(x + " * " + y + " = " + (x*y));
System.out.println(x + " / " + y + " = " + (x/y));
       }
}

Exercise 7

import java.io.*;

public class Exercise7
{
        public static void main (String argv[])
       {
                  int age;
                  age=31;
                  if ( age >= 21) 
                      System.out.println( "Eligible to vote ");
                  else 
                      System.out.println("Not eligible.");
        }
}

Exercise 8

import java.io.*;

public class Exercise8
{
    public static void main (String argv[])
    {
                  string day=”Tuesday”;
                  if ( day == “Saturday” || day == “Sunday” ) 
                      System.out.println( "Weekend");
                  else 
                      System.out.println("Weekday");
    }
}

Exercise 9

import java.io.*;

public class Exercise9
{
    public static void main (String argv[])
    {
                  int grade=8;
                  if ( grade < 7 ) 
                      System.out.println( "Elementary");
                  else if ( grade < 9 )
                      System.out.println("Junior High");
                  else 
                      System.out.println("High School");
    }
}

Exercise 10

import java.io.*;

public class Exercise10
{
    public static void main (String argv[])
    {            
int year_of_birth = 1960; 
switch ( year_of_birth % 12 )
{ 
case 0: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Monkey"); 
break; 
case 1: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Rooster"); 
break; 
case 2: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Dog"); 
break; 
case 3: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Pig"); 
break; 
case 4: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Rat"); 
break; 
case 5: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Ox"); 
break; 
case 6: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Tiger"); 
break; 
case 7: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Rabbit"); 
break; 
case 8: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Dragon"); 
break; 
case 9: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Snake"); 
break; 
case 10: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Horse"); 
break; 
case 11: 
System.out.println("You were born in “ + year_of_birth + “, the year of the Sheep"); 
break; 
default: 
System.out.println("Error"); 
break; 
}
    }
}

Exercise 11

import java.io.*;

public class Exercise11
{
    public static void main (String argv[])
    {
for ( int i = 10;  i > 0; i-- ) 
{
System.out.println ( i );
}
    }
}

Exercise 12

import java.io.*;

public class Exercise12
{
    public static void main (String argv[])
    {
int i = 10;
while ( i > 0 )
{
System.out.println ( i );
i--;
}
    }
}

Exercise 13

import java.io.*;

public class Exercise13
{
    public static void main (String argv[])
    {
int i = 10;
do
{
System.out.println ( i );
i--;
} while ( i > 0 ) ;
    }
}