Java Practicals

// Practical 1 ----------------------------------
import java.util.Scanner;
class areacircle
{
    int r;
    void getdata()
    {
        Scanner in=new Scanner(System.in);
        System.out.print("Enter radius:");
        r=in.nextInt();
    }
    void findarea()
    {
        double area,PI=3.14;
        area=PI*r*r;
        System.out.println("Area of circle is:"+area);
    }   
}
class java1
{
    public static void main(String args[])
    {
        areacircle c1=new areacircle();
        c1.getdata();
        c1.findarea();
    }
}

Output :

// Practical 2 ----------------------------------

import java.util.Scanner;
class factorial
{
 int fact=1,no,i;
 void getdata()
 {
  Scanner in=new Scanner(System.in);
  System.out.print("Enter no for find factorial:");
  no=in.nextInt();
 }
 void findarea()
 {
  for(i=1;i<=no;i++)
  fact=fact*i;
  System.out.println("Factorial of given no is:"+fact);


 }  
}
class java2
{
 public static void main(String args[])
 {
  factorial f1=new factorial();
  f1.getdata();
  f1.findarea();
 } 
}

Output :

// Practical 3 ----------------------------------

import java.util.Scanner;
class java3
{
    public static void main(String args[])
    {
        int no1,no2;
        Scanner in=new Scanner(System.in);
        System.out.println("Enter no1:");
        no1=in.nextInt();
        System.out.println("Enter no2:");
        no2=in.nextInt();
        if(no1>no2)
        {
            System.out.println("no1 is larger");
        }
        else
        {
            System.out.println("no2 is larger");
        }
    }
}

Output :

// Practical 4 ----------------------------------

import java.util.Scanner;
class java4
{
    public static void main(String args[])
    {
        int a,b,c;

        Scanner in=new Scanner(System.in);
        System.out.println("Enter value of a:");
        a=in.nextInt();
        System.out.println("Enter value of b:");
        b=in.nextInt();
        System.out.println("Enter value of c:");
        c=in.nextInt();
        if(a>b)
        {
            if(a>c)
            {
                System.out.println("value of a is larger");
            }
            else
            {
                System.out.println("value of c is larger");
            }
        }
        else
        {
            if(b>c)
            {
                System.out.println("value of b is larger");
            }
            else
            {
                System.out.println("value of c is larger");
            }
        }
    }
}

Output :

// Practical 5 ----------------------------------

import java.util.Scanner;
class java5
{
    public static void main(String args[])
    {
        int choice;
        Scanner in=new Scanner(System.in);

        System.out.println("Enter choice:");
        choice=in.nextInt();
        switch(choice)
        {
            case 1: System.out.println("This is chocie 1");

            case 2: System.out.println("This is chocie 2");

            case 3: System.out.println("This is chocie 3");
                break;
            case 4: System.out.println("This is chocie 4");
                break;
            case 5: System.out.println("This is chocie 5");
                break;
            default:    System.out.println("Please enter right choice");
        }
    }
}

Output:

// Practical 6 ----------------------------------

import java.util.Scanner;
class java6
{
    public static void main(String args[])
    {
        Scanner in=new Scanner(System.in);
        int no,r,sum=0;
        System.out.println("Enter the no:");
        no=in.nextInt();

        while(no>0)
        {
            r=no%10;
            no=no/10;
            sum=sum+r;
        }
        System.out.println("Sum of the digit is:"+sum);

    }

Output

// Practical 7 ----------------------------------

import java.util.Scanner;
class java7
{
    public static void main(String args[])
    {
        int no,i,c;
        int a=0,b=1;

        float sum=0;
        System.out.print(a+""+b);

        for(i=1;i<=10;i++)
        {
            c=a+b;
            System.out.print(c);
            a=b;
            b=c;

        }

    }
}

Output

// Practical 8 ----------------------------------

import java.util.Scanner;
class java8
{
    public static void main(String args[])
    {
        int no,i;
        int temp=0;
        Scanner in=new Scanner(System.in);
        System.out.println("Enetr the no:");
        no=in.nextInt();

        for(i=2;i<=no-1;i++)
        {
            if(no%i==0)
            {
                temp=temp+1;

            }
        }

        if(temp>0)
        {
            System.out.print("no is not prime");
        }
        else
        {
            System.out.print("no is prime");
        }        
    }
}

Output

// Practical 9 ----------------------------------

import java.util.Scanner;
class java9
{
    public static void main(String args[])
    {
        int no,i;
        Scanner in=new Scanner(System.in);
        System.out.println("Enetr the no:");
        no=in.nextInt();
        for(i=1;i<=no;i++)
        {
            if(i==7)
            {
                break;
            }
            System.out.println(i);
        }
    }
}

Output:

// Practical 10 ----------------------------------

import java.util.Scanner;
class java10
{
    public static void main(String args[])
    {
        int no,i;
        Scanner in=new Scanner(System.in);
        System.out.println("Enetr the no:");
        no=in.nextInt();
        for(i=1;i<=no;i++)
        {
            if(i==11)
            {
                continue;
            }
            System.out.println(i);
        }
    }
}

Output

// Practical 11

class java11
{
    public static void main(String args[])
    {
        for(String s:args)
        {
            System.out.println(s);
        }
    }
}

Output

// Practical 12 ----------------------------------

import java.util.Scanner;
class java12
{
    public static void main(String args[])
    {
        Scanner in=new Scanner(System.in);
        int i,j,element,temp,no;
        int arr[]=new int[10];

        System.out.println("Enter the number of an array:- ");
        no=in.nextInt();

        for(i=1;i<=no;i++)
        {
            System.out.println("Enter the element:");
            arr[i]=in.nextInt();
        }

        for(i=1;i<=no;i++)
            {
                   for(j=i;j<=no;j++)
                   {
                           if(arr[i] > arr[j])
                         {
                                 temp=arr[i];
                                 arr[i]=arr[j];
                                 arr[j]=temp;
                    }
                       }
            }
        System.out.println("Sorted list in ascending order:");
         for(i=1;i<=no;i++)
        {
            System.out.println(arr[i]);
        }

    }
}

Output

// Practical 13 ----------------------------------

import java.util.Scanner;
class Student
{
    int java,se,ec,net,t;
    float per;
    String result,grd;
    void getmarks()
    {
        Scanner in=new Scanner(System.in);

        System.out.println("Enter the java marks:");
        java=in.nextInt();

        System.out.println("Enter the software engineering marks:");
        se=in.nextInt();

        System.out.println("Enter the e-commerce marks:");
        ec=in.nextInt();

        System.out.println("Enter the net framework marks:");
        net=in.nextInt();
    }
    void total()
    {
        t=java+se+ec+net;
        System.out.println("From Total 400 get:"+t);
    }

    void percentage()
    {
        per=t/4;
        System.out.println("Percentage:"+per);
    }

    void result()
    {
        if(java<35 || se<35 || ec<35 || net<35)
        {
            System.out.println(result="Fail");
        }
        else
        {
            System.out.println(result="Pass");
        }
    }

    void grade()
    {
        if(result=="Pass")
        {
            if(per>=70.0 && per<=100.0)
            {
                System.out.println("Student Grade:A");  
            }
            else if(per>=60.0 && per<70.0)
            {
                System.out.println("Student Grade:B");
            }
            else if(per>=50.0 && per<60.0)
            {
                System.out.println("Student Grade:C");
            }
            else if(per>=40.0)
            {
                System.out.println("Student Grade:D");
            }
            else if(per>=35.0 && per<40.0)
            {
                System.out.println("Student Grade:E");
            }
        }
        else
        {
            System.out.println("Student Grade:F");      
        }   
    }
}
class java13
{
    public static void main(String args[])
    {
        Student s1=new Student();
        s1.getmarks();
        s1.total();
        s1.percentage();
        s1.result();
        s1.grade();
    }
}

Output

// Practical 14 ----------------------------------

import java.util.Scanner;
class empsalary
{   

    String name;
    int id,salary,t,p,h;
    Scanner in=new Scanner(System.in);      
    void heading()
    {
        String s="Employee Salary Sleep";   
        System.out.println("\t\t"+s);
    }
    void underline()
    {
        System.out.println("--------------------------------------------------------------");
    }

    void getdata()
    {
        System.out.println("Enter emp name:");
        name=in.nextLine();

        System.out.println("Enter emp ID:");
        id=in.nextInt();

        System.out.println("Enter emp salary:");
        salary=in.nextInt();            
    }

    void pflogic()
    {
        int pf=5;
        p=salary*pf/100;
        System.out.println("\t\tEmployee salary pf is:"+p);
    }

    void tddalogic()
    {
        int td=10;
        t=salary*td/100;
        System.out.println("\t\tEmployee salary tdda is:"+t);
    }

    void hralogic()
    {
        int hr=12;
        h=salary*hr/100;
        System.out.println("\t\tEmployee salary hra is:"+h);
    }

    void totalsalary()
    {
        int total;
        total=salary-p+t+h;
        System.out.println("The total salary of employee is:"+total);
    }
    void alldisplay()
    {
        System.out.println("\t\tEmployee id:"+id);
        System.out.println("\t\tEmployee name:"+name);
        System.out.println("\t\tEmployee salary:"+salary);
    }
    void nesting()
    {
        underline();
        heading();
        underline();
        getdata();
        heading();
        underline();
        alldisplay();
        pflogic();
        tddalogic();
        hralogic();
        underline();
        underline();
        totalsalary();
        underline();
    }
}


class java14
{
    public static void main(String args[])
    {
        empsalary emp1=new empsalary();
        empsalary emp2=new empsalary(); 
        empsalary emp3=new empsalary();
        emp1.nesting();
        emp2.nesting();
        emp3.nesting();
    }
}

Output

// Practical 15 ----------------------------------

import java.util.Scanner;
class staticmembers
{
    static String sem="Semester 5";
    String name;
    int rno;
    void rno()
    {
        Scanner in=new Scanner(System.in);
        System.out.println("Enter rollno:-");
        rno=in.nextInt();
    }

}
class java15
{
    public static void main(String args[])
    {
        staticmembers s1=new staticmembers();
        s1.rno();
        String a=staticmembers.sem;
        System.out.println("Your semester of BCA is:-"+a);
    }   
}

Output

// Practical 16 ----------------------------------

import java.util.Scanner;
class nesting
{
    Scanner in=new Scanner(System.in);
    int a,b;
    void getdata()
    {
        System.out.println("Enter first value:-");
        a=in.nextInt();

        System.out.println("Enter second value:-");
        b=in.nextInt();
    }   

    void putdata()
    {
        int sum;
        sum=a+b;
        System.out.println("The sum is:-"+sum);
    }

    void nestingmethod()
    {
        getdata();
        putdata();
    }
}

class java16
{
    public static void main(String args[])
    {
        nesting n1=new nesting();
        n1.nestingmethod(); 
    }
}

// Practical 17 ----------------------------------

class overloading
{
    int x,y;
    void mul(int a)
    {
        x=a;
        System.out.println("The number is:"+x);
    }
    void mul(int a,int b)
    {
        x=a+b;

        System.out.println("The sum is:"+x);            
    }
}   
class java17
{
    public static void main(String args[])
    {
        overloading o1=new overloading();
        o1.mul(4);
        o1.mul(5,6);    
    }
}

// Practical 18 ----------------------------------

class Tester {
    int a;
    String b;

 }
 class java18
 {
     public static void main(String[] args) {

       //Default constructor
       //is called to create a new object
       Tester t = new Tester();
       //print the default values
       System.out.println(t.a);
       System.out.println(t.b);
    }
 }

Output

// Practical 19 ----------------------------------

class pconstructor 
{
    pconstructor(int x,int y)
    {
        System.out.println("Hi! I am parameterized constructor");
        int a,b,c;

        a=x;
        b=y;

        c=a+b;

        System.out.println("The sum is:"+c);        
    }
}

class java19
{
    public static void main(String args[])
    {
        pconstructor p1=new pconstructor(10,20);
    }
}

// Practical 20 ----------------------------------

class oconstructor 
{
    oconstructor()
    {
        System.out.println("Hi! I am default constructor"); 
    }

    oconstructor(int x)
    {
        int a=x;
        int b;
        b=a*a;
        System.out.println("The return value from single arg constructor:"+b);

    }

    oconstructor(int p,int q)
    {
        int j,k,s;
        j=p;k=q;
        s=j*k;
        System.out.println("The return value from double args constructor:"+s);
    }
}

class java20

{
    public static void main(String args[])
    {
        oconstructor o1=new oconstructor();
        oconstructor o2=new oconstructor(4);
        oconstructor o3=new oconstructor(4,5);
    }
}

// Practical 21

import java.util.Scanner;
class Singleinheritance
{
    Scanner in=new Scanner(System.in);
    String sname,hobby,sem;
    int rno;

    void student()
    {
        System.out.println("Enter Student Name:");
        sname=in.nextLine();

        System.out.println("Enter Student Hoby:");
        hobby=in.nextLine();

        System.out.println("Enter Student Semester:");
        sem=in.nextLine();

        System.out.println("Enter Student Rno:");
        rno=in.nextInt();               
    }

}

class Sports extends Singleinheritance
{
    int sw;

    void extra()
    {

        System.out.println("Enter Student Sport weightage:");
        sw=in.nextInt();
    }
}

class java21
{
    public static void main(String args[])
    {
        Sports s1=new Sports();
        s1.student();   
        s1.extra(); 
    }
}

// Practical 22

class X
{
   public void methodX()
   {
     System.out.println("Class X method");
   }
}
class Y extends X
{
public void methodY()
{
System.out.println("class Y method");
}
}
class java22 extends Y
{
   public void methodZ()
   {
     System.out.println("class Z method");
   }
   public static void main(String args[])
   {
     java22 obj = new java22();
     obj.methodX(); //calling grand parent class method
     obj.methodY(); //calling parent class method
     obj.methodZ(); //calling local method
  }
}

// Practical 23

import java.util.Scanner;
class Grandfather
{
    Scanner in=new Scanner(System.in);
    String gfname;

    void gf()
    {
        System.out.println("Hii! This is grand father class");

        System.out.println("Enter GrandFather's Name:");
        gfname=in.nextLine();               
    }

}

class Father extends Grandfather 
{
    String fname;

    void father()
    {
        System.out.println("Hii! This is father class from Grandfather class");

        System.out.println("Enter Father's Name:");
        fname=in.nextLine();    
    }
}

class Uncle extends Grandfather
{
    String uname;

    void uncle()
    {
        System.out.println("Hii! This is uncle class from Grandfather class");

        System.out.println("Enter Uncle's Name:");
        uname=in.nextLine();    
    }
}

class Son extends Father
{
    String sname;

    void son()
    {
        System.out.println("Hii! This is Son class from Father class");

        System.out.println("Enter Son's Name:");
        sname=in.nextLine();    
    }
}


class Daughter extends Uncle
{
    String dname;

    void daughter()
    {
        System.out.println("Hii! This is Daughter class from Uncle class");

        System.out.println("Enter Daughter's Name:");
        dname=in.nextLine();    
    }
}

class java23
{
    public static void main(String args[])
    {
        Son s1=new Son();
        s1.gf();
        s1.father();
        s1.son();
        Daughter d1=new Daughter(); 
        d1.gf();
        d1.uncle();
        d1.daughter();
    }
}

// Practical 24

class Super
{
    int x;
    Super(int a)
    {
        x=a;
    }

    void display()
    {
        System.out.println("Super x:"+x);               
    }
}

class Sub extends Super
{
    int y;
    Sub(int a,int b)    
    {
        super(a);
        y=b;
    }
    void display()
    {   
        System.out.println("Super x:"+x);
        System.out.println("Sub y:"+y); 
    }
}

class java24
{
    public static void  main(String args[])
    {
        Super s1=new Super(100);
        s1.display(); 
    }
}

// Practical 25

class Super
{
     int x;
    Super(final int a)
    {
        x=a;
    }

 final void display()
    {
        System.out.println("Super x:"+x);               
    }
}

class Sub extends Super
{
    int y;
    Sub(int a,int b)    
    {
        super.x=10;
        y=b;
    }
    void display()//Display method must not override in the subclass of superclass.
    {   
        System.out.println("Super x:"+x);
        System.out.println("Sub y:"+y); 
    }
}

class java25
{
    public static void  main(String args[])
    {
        Sub s1=new Sub(100,300);
        s1.display(); 
    }
}

// Practical 45

import java.applet.*;
import java.awt.*;

public class java45 extends Applet {
    public void paint(Graphics g) {
        g.drawString("Hello Applet", 50, 50);
    }
}

// <applet code="java45.class" width=300 height=300></applet>

45 Output

// Practical 46 java46.java

import java.applet.Applet;
import java.awt.Graphics;

public class java46 extends Applet {
    public void init() {
        System.out.println("1.I am init()");
    }

    public void start() {
        System.out.println("2.I am start()");
    }

    public void paint(Graphics g) {
        System.out.println("3.I am paint()");
    }

    public void stop() {
        System.out.println("4.I am stop()");
    }

    public void destroy() {
        System.out.println("5.I am destroy()");
    }
}

java46.html

<html>
<body>
    <applet code="java46.class" width="300" height="300"></applet>
</body>
</html>

46 Output

// Practical 47

import java.applet.Applet;
import java.awt.Graphics;

public class java47 extends Applet {
    public void paint(Graphics g) {
        String str = getParameter("msg");
        g.drawString(str, 50, 50);
    }
}

// <applet code="java47.class" width="400" height="400">
// <param name="msg" value="Welcome to applet">
// </applet>

47 Output

// Practical 48

import java.applet.Applet;
import java.awt.*;

//<applet code="java48.class" width="300" height="300">  
//</applet> 
public class java48 extends Applet {

    public void paint(Graphics g) {
        g.setColor(Color.red);
        g.drawString("Welcome", 50, 50);
        g.drawLine(20, 30, 20, 300);
        g.drawRect(70, 100, 30, 30);
        g.fillRect(170, 100, 30, 30);
        g.drawOval(70, 200, 30, 30);

        g.setColor(Color.pink);
        g.fillOval(170, 200, 30, 30);
        g.drawArc(90, 150, 30, 30, 30, 270);
        g.fillArc(270, 150, 30, 30, 0, 180);

    }
}

48 Output

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