1. Write a program to
sort the elements of one dimensional array. Read value of
array elements through command line argument.
class u2_p1
{
public static void main(String args[])
{
int a[]= new int[args.length];
for(int i=0;i<args.length;i++)
{
a[i]=Integer.parseInt(args[i]);
}
int temp;
for(int i=0;i<a.length;i++)
{
for(int j=i+1;j<a.length;j++)
{
if(a[i]<a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
} } }
for(int i=0;i<a.length;i++)
{
System.out.println(a[i]);
} } }
2. Write a program to create an array to store 5 integer values. Also
initialize the array with 5 numbers and display the array Elements in reverse
order.
import java.util.*;
class u2_p2
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int a[]= new int[5];
for(int i=0;i<5;i++)
{
System.out.println("Enter value of an array");
a[i]=sc.nextInt();
}
for(int i=4;i>=0;i--)
{
System.out.println(a[i]);
} } }
3. Write a program to find sum of two matrices of 3 x3.
import java.util.*;
class u2_p3
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int a[][]= new int[3][3];
int b[][]= new int[3][3];
int c[][]= new int[3][3];
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.println("Enter value of an array");
a[i][j]=sc.nextInt();
}
}
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.println("Enter value of an array");
b[i][j]=sc.nextInt();
} }
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
c[i][j]=a[i][j]+b[i][j];
System.out.print(" "+c[i][j]);
}
System.out.println("\n");
} } }
4. Write program to create an array of company name and another array
of price
quoted by the company. Fetch the company name who has quoted the
lowest amount.
import java.util.*;
class u2_p4
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int p[]= new int[5];
String n[]= new String[5];
for(int i=0;i<5;i++)
{
System.out.println("Enter name of
company");
n[i]=sc.next();
System.out.println("Enter price quoted");
p[i]=sc.nextInt();
}
int min=p[0];
for(int i=0;i<5;i++)
{
if(min>p[i])
{
min=p[i];
}
}
for(int i=0;i<5;i++)
{
if(min==p[i])
{
System.out.print("The company
quated min amount is "+n[i]);
break;
}
} } }
5. Write an interface called numbers, with a method in Process(int x,
int y). Write a class called Sum, in which the method Process finds the sum of
two numbers and returns an int value. Write another class called Average, in
which the Process method finds the average of the two numbers and returns an
int.
interface Numbers
{
abstract
int process(int x, int y);
}
class sum implements Numbers
{
public int
process( int x, int y)
{
int
ans=x+y;
return(ans);
} }
class avg implements Numbers
{
public int
process( int x, int y)
{
int
ans=(x+y)/2;
return(ans);
} }
class infdemo
{
public static void main(String args[])
{
sum s1= new sum();
System.out.println("Sum is"+s1.process(5,5));
avg a1= new avg();
System.out.println("Avg
is"+a1.process (6,6)); } }
6. Create a class called NumberData that accept any array of the five
numbers.
Create a sub class called Numplay which provides methods for
followings:
1. Display numbers entered.
2. Sum of the number.
3. Average of the numbers.
4. Maximum of the numbers.
5. Minimum of the numbers.
Create a class that provides menu for above methods. Give choice from
the
command-line argument.
import java.util.*;
class Numberdata
{
int a[]= new int[5];
Scanner sc= new Scanner(System.in);
void createarray()
{
for(int i=0;i<5;i++)
{
System.out.println("\n Enter element");
a[i]=sc.nextInt();
}
}
}
class Numplay extends Numberdata
{
void display()
{
createarray();
for(int i=0;i<5;i++)
{
System.out.println("\n element"+a[i]);
}
}
void sum()
{
int s=0;
createarray();
for(int i=0;i<5;i++)
{
s=s+a[i];
}
System.out.println("\n Sum is "+s);
}
void avg()
{
int s=0;
createarray();
for(int i=0;i<5;i++)
{
s=s+a[i];
}
float a=(float) s/5;
System.out.println("\n Avg is "+a);
}
void max()
{
int m=0;
createarray();
for(int i=0;i<5;i++)
{
if(m<a[i])
m=a[i];
}
System.out.println("\n Maximum
is "+m);
}
void min()
{
createarray();
int m=a[0];
for(int i=0;i<5;i++)
{
if(m>a[i])
m=a[i];
}
System.out.println("\n Minimum
is "+m);
}
}
class u2_p6
{
public static void main(String args[])
{
Numplay n1= new Numplay();
int ch= Integer.parseInt(args[0]);
switch(ch)
{
case 1:
n1.display();
break;
case 2:
n1.sum();
break;
case 3:
n1.avg();
break;
case 4:
n1.max();
break;
case 5:
n1.min();
break;
default:
System.out.println("\n
Wrong choice");
}
}
}
7.Declare an abstract class Vehicle with an abstract method named
numWheels().provide subclasses Car and Truck that each implements this method.
Create instance of these subclasses and demonstrate
the use of this method
abstract class vehicle
{
abstract void
numwheels();
}
class car extends
vehicle
{
void numwheels()
{
System.out.println("\n Car class
with four wheels");
}
}
class truck extends
vehicle
{
void numwheels()
{
System.out.println("\n Truck class
with six wheels");
}
}
class u2_p7
{
public static void main(String args[])
{
car c1= new car();
c1.numwheels();
truck t1= new truck();
t1.numwheels();
}
}
8. Write an interface called Exam with a method Pass(int mark) that
returns a Boolean. Write another interface called Classify with a method
Division(int average) which returns a string. Write a class called Result which
implements both Exam and Classify. The pass method should return true if the
marks is greater than or equal to 35 else false. The division method must
return “First” when the parameter average is 60 or more, “second” when average
is 50 or more but below 60, “no division” when average is less than 50.
interface exam
{
boolean pass(int
marks);
}
interface classify
{
String division(int avg);
}
class result
implements exam, classify
{
public boolean
pass(int marks)
{
if(marks>35)
return(true);
else
return(false);
}
public String
division(int avg)
{
if(avg>=60)
return("first");
else if(avg<60 && avg>=50)
return("second");
else
return("no division");
}
}
class u2_p8
{
public static void main(String args[])
{
result r1= new result();
System.out.println("\n
Your result is " +r1.pass(50));
System.out.println("\n Your division
is " +r1.division(50));
}
}
9. Create class calculation with an abstract method area( ). Create
Rectangle and Triangle subclasses of calculation and find area of rectangle and
triangle.
abstract class
calculation
{ int l,b;
abstract void
area();
}
class rect extends
calculation
{
rect(int p, int q)
{
l=p;
b=q;
}
void area()
{
System.out.println("\n Area of rectangle is"+(l*b));
}
}
class tri extends
calculation
{
tri(int p, int q)
{
l=p;
b=q;
}
void area()
{
System.out.println("\n Area of triangle is"+((l*b)/2));
}
}
class u2_p9
{
public static void main(String args[])
{
rect r1= new rect(5,6);
r1.area();
tri t1= new tri(6,6);
t1.area();
}
}
10. The abstract Vegetable class has four subclasses named cabbage,
carrot and potato. Write an application that demonstrates how to establish this
class hierarchy. Declare one instance variable of type string that indicates
the color of a vegetable. Create and display instances of these object.
Override the toString() method of object to return a string with the name of
the vegetable and its color.
abstract class vegetable
{ String s;
abstract String
tostring();
}
class cabbage extends vegetable
{
cabbage(String
s1)
{
s=s1;
}
String tostring()
{
return("Cabbage color is "+s);
}
}
class carrot extends vegetable
{
carrot(String
s1)
{
s=s1;
}
String tostring()
{
return("Carrot color is "+s);
}
}
class potato extends vegetable
{
potato(String
s1)
{
s=s1;
}
String tostring()
{
return("Potato color is "+s);
}
}
class u2_p10
{
public static void
main(String args[])
{
cabbage o1= new
cabbage("Green");
System.out.println(o1.tostring());
carrot o2= new
carrot("Red");
System.out.println(o2.tostring());
potato o3= new
potato("Yellowish");
System.out.println(o3.tostring());
}
}
