LAB FILE1) FIBONACCI

Code:-import java.util.Scanner;class fab{ public static void main(String args[]) { Scanner sc=new Scanner(System.in); int a,b,c,n; a=0; b=1; System.out.println("enter the value of n:"); n=sc.nextInt(); for(int i=0;i<n;i++) { System.out.println(a); c=a+b; a=b; b=c; } }}

Output

2) CalculatorCode:-import java.util.Scanner;class cal{ public static void main(String args[]) { int n; float a,b; Scanner sc=new Scanner(System.in); System.out.println("Enter your choice"); System.out.println("\n1)add\n2)sub\n3)multi\n4)div"); n=sc.nextInt(); if(n==1) { System.out.println("Enter the value of a :"); a=sc.nextFloat(); System.out.println("Enter the value of b :"); b=sc.nextInt(); System.out.println(a+b); } if(n==2) { System.out.println("Enter the value of a :"); a=sc.nextFloat(); System.out.println("Enter the value of b :"); b=sc.nextInt(); System.out.println(a-b); } if(n==3) { System.out.println("Enter the value of a :"); a=sc.nextFloat(); System.out.println("Enter the value of b :"); b=sc.nextInt(); System.out.println(a*b); } if(n==4) { System.out.println("Enter the value of a :"); a=sc.nextFloat(); System.out.println("Enter the value of b :"); b=sc.nextInt(); System.out.println(a/b); } }}

Output

3)Single level inheritance example ( parent and child class)Code :-class A{ void m1() { System.out.println("hello"); }}class B extends A{ void m2() { System.out.println("world"); }}class inh{ public static void main(String args[]) { B obj=new B(); obj.m1(); obj.m2(); }}

Output :-

4) Inheritance of college and student

Code :-import java.util.Scanner;class university{ String col_name,col_add; Scanner D=new Scanner(System.in); void get_university() { System.out.println("enter the college name"); col_name=D.nextLine(); System.out.println("enter the college address"); col_add=D.nextLine(); System.out.println(col_name); System.out.println(col_add); }}

class student extends university{ String std_name,std_id; Scanner D=new Scanner(System.in); void get_student() { System.out.println("enter name of student name"); std_name=D.nextLine(); System.out.println("enter email id of student"); std_id=D.nextLine(); System.out.println(std_name); System.out.println(std_id); }}

class inheritance{ public static void main(String args[]) { student a=new student(); a.get_student(); a.get_university(); }}

Output :-

5)Even and odd

Code :- import java.util.Scanner;class A{ public static void main(String args[]) { Scanner sc=new Scanner(System.in); System.out.println("enter a number :"); int a=sc.nextInt(); if(a%2==0) { System.out.println("enen number"); } else { System.out.println("odd number"); } } }

Output :-

6)Factorial

Code :-

class fact{ public static void main(String args[]) { int fact=1,i; for(i=1;i<=3;i++) { fact=fact*i; } System.out.println(fact); }}

Output :-

7)Method overloading

Code:-import java.util.Scanner;class overloading{ Scanner D=new Scanner(System.in); void m1(int a) { System.out.println("enter the value of a"); a=D.nextInt(); System.out.println(a); } void m1(int x,float y) { System.out.println("enter the value of x"); x=D.nextInt(); System.out.println("enter the value of y"); y=D.nextInt(); System.out.println(x); System.out.println(y); } public static void main(String args[]) { overloading s=new overloading(); s.m1(2); s.m1(3,7); }}

Output :-

8) Method overridingCode :-import java.util.Scanner;class A{ int a,b,c; Scanner D=new Scanner(System.in); void m1() { System.out.println("enter the value of a"); a=D.nextInt(); System.out.println("enter the value of b"); b=D.nextInt(); c=a+b; System.out.println(c); }}

class B extends A{ int x,y,z; Scanner D=new Scanner(System.in); void m1() { System.out.println("enter the value of x"); x=D.nextInt(); System.out.println("enter the value of y"); y=D.nextInt(); z=x*y; System.out.println(z); }}

class overriding{ public static void main(String arg[]) { B s=new B(); s.m1(); }}

Output :-

9)Pattern 1class Pattern

{

public static void main(String []args)

{

for(int i=0;i<5;i++)

{

for(int j=0;j<i+1;j++)

{

System.out.print("*");

}

System.out.println();

}

}

}

10)Pattern 2class Pattern2

{

public static void main(String[] args)

{

int n =5;

int space = n - 1;

for (int i = 0; i < n; i++)

{

for (int j = 0; j < space; j++)

{

System.out.print(" ");

}

for (int j = 0; j <= i; j++)

{

if(i%2==0)

{

System.out.print("* ");

}

}

System.out.print("\n");

space--;

}

space = 0;

for (int i = n-1; i > 0; i--)

{

for (int j = 0; j < space; j++)

{ System.out.print(" ");

}

for (int j = 0; j < i; j++)

{

if(i%2!=0)

{

System.out.print(" *");

}

}

System.out.print("\n");

space++;

}

}

}

11)Pattern 3class Pattern4

{

public static void main(String []args)

{

for(int i=0;i<5;i++)

{

for(int j=0;j<i+1;j++)

{

System.out.print(j+1);

}

System.out.println();

}

}

}

12)Constructorclass A

{

int a,b;

A()

{

System.out.println("enter");

a=10;

b=20;

System.out.println(a);

System.out.println(b);

}

}

class Constructor

{

public static void main(String args[])

{

A a=new A();

A a1=new A();

A a2=new A();

}

}

13)Prime number.Code :-

import java.util.Scanner;class prime{ public static void main(String args[]) { int a,i; Scanner D=new Scanner(System.in); System.out.println("enter value of a"); a=D.nextInt(); for(i=2;i<=a-1;i++) { if(a%2==0) { System.out.println("not prime"); break; } else { System.out.println("prime"); break; } } }}

Output :-

14) Swapping (using third variable or without third variable)

Code:-

import java.util.Scanner;class swap{ public static void main(String args[]) { int a,b,c; Scanner D=new Scanner(System.in); System.out.println("enter value of a"); a=D.nextInt(); System.out.println("enter value of b"); b=D.nextInt(); c=a; a=b; b=c; System.out.println(a); System.out.println(b); }}

Output :-

15) If - else example (eligible to vote)Code:-

import java.util.Scanner;class A{ public static void main(String args[]) { Scanner sc=new Scanner(System.in); System.out.println("enter your age :"); int a=sc.nextInt(); if(a<18) { System.out.println("not eligible for vote"); } else { System.out.println("eligible for vote"); } } }

Output :-

16) Print the value of array element of 1 - D array.

Code :-

import java.util.Scanner;class array{ public static void main(String arg[]) { int a[]=new int[5]; Scanner D=new Scanner(System.in); for(int i=0;i<5;i++) { System.out.println("enter a number"); a[i]=D.nextInt(); } for(int i=0;i<5;i++) { System.out.println(a[i]); } }}

Output :-

17) Let us assume there exist a company which contains

company name, location, license number. Let us assume there

exist a permanent employee which contains employee number,

employee name designation and basic salary. D = 30 % of basic salary TA = 15% of basic salary CA = 2% MA = 5% HRA = 10% GPF = 2% LIC = 5%

Cal net Sal = (basic salary + DA +TA + CA + MA + HRA+) - (LIC + GPF) generate employee pay slip. Let us assume there exist a adhere employee which contains ename, no of working days and wage per days.

Calculate total salary of the employee.

Total = no. of working days+ wage per day

Generate total salary. Code :-

import java.util.Scanner;

class company

{

String com_name,com_loc;

int lic_no;

Scanner D=new Scanner(System.in);

void m()

{

System.out.println("enter the company name");

com_name=D.nextLine();

System.out.println("\nenter the company location");

com_loc=D.nextLine();

System.out.println("\nenter the licence number");

lic_no=D.nextInt();

}

}

class employee extends company

{

String emp_name,emp_desig;

int emp_no,bas_sal,DA,TA,CC,MA,HRA,GPF,LIC,tot_sal,t;

Scanner D=new Scanner(System.in);

void m1()

{

System.out.println("\nenter the name of employee");

emp_name=D.nextLine();

System.out.println("\nenter the employe's designation");

emp_desig=D.nextLine();

System.out.println("\nenter the employee number");

emp_no=D.nextInt();

System.out.println("\nenter the basic salary");

bas_sal=D.nextInt();

DA=(30*bas_sal)/100;

TA=(15*bas_sal)/100;

CC=(2*bas_sal)/100;

MA=(5*bas_sal)/100;

HRA=(10*bas_sal)/100;

GPF=(2*bas_sal)/100;

LIC=(5*bas_sal)/100;

t=GPF+LIC;

tot_sal=(bas_sal+DA+TA+CC+MA+HRA-t);

System.out.println("\

n**********************************************************************************

********************");

System.out.println("\n\t\t\t\t\t\tPAY SLEEP\t\t\t");

System.out.println("\nCOMPANY NAME:\t"+com_name);

System.out.println("COMPANY LOCATION:\t"+com_loc);

System.out.println("COMPANY LICENCE NUMBER:\t"+lic_no);

System.out.println("\nEMPLOYEE NAME:\t"+emp_name);

System.out.println("EMPLOYEE DESIGNATION:\t"+emp_desig);

System.out.println("EMPLOYEE NUMBER:\t"+emp_no);

System.out.println("BASIC SALARY:\t"+bas_sal);

System.out.println("\nDA:\t"+DA+"\t\t\tTA:\t"+TA+"\t\t\tCC:\t"+CC);

System.out.println("MA:\t"+MA+"\t\t\tHRA:\t"+HRA);

System.out.println("GPF:\t"+GPF+"\t\t\tLIC:\t"+LIC);

System.out.println("\nTOTAL SALARY:\t"+tot_sal);

System.out.println("******************************************************************

************************************");

}

}

class a_employee extends employee

{

String name;

int no_of_days, w_per_day,tot_in;

Scanner D=new Scanner(System.in);

void m2()

{

System.out.println("\nEMPLOYEE NAME:");

name=D.nextLine();

System.out.println("NUMBER OF WORKING DAYS:");

no_of_days=D.nextInt();

System.out.println("WAGE PER DAY :");

w_per_day=D.nextInt();

tot_in=no_of_days*w_per_day;

System.out.println("\

n**********************************************************************************

********************");

System.out.println("\n\t\t\t\t\tPAY SLEEP\t\t\t");

System.out.println("EMPLOYEE NAME:\t"+name);

System.out.println("NUMBER OF WORKING DAYS:\t"+no_of_days);

System.out.println("WAGE PER DAY:\t"+w_per_day);

System.out.println("\nTOTAL WAGE:\t"+tot_in);

System.out.println("******************************************************************

************************************");

}

}

class employe

{

public static void main(String arg[])

{

a_employee a=new a_employee();

a.m();

a.m1();

a.m2();

}

}

Output :-

18)Sorting

class Sort

{

public static void main(String args[])

{

int a[]={06,31,24,22,27};

for(int i=0;i<5;i++)

{

for(int j=0;j<i;j++)

{

if(a[i]<a[j])

{

int c=a[j];

a[j]=a[i];

a[i]=c;

}

}

}

for(int k=0;k<5;k++)

{

System.out.println(a[k]);

}

}

}

19)To write 1-10 number in fileimport java.io.*;

class File3

{

public static void main(String args[])

{

try

{

File F = new File("abc.txt");

F.createNewFile();

//System.out.println(F.exists());

//System.out.println(F.length());

FileOutputStream fos=new FileOutputStream(F);

for(int i=1;i<11;i++)

{

fos.write(i);

}

}

catch(Exception ae)

{

System.out.println("file handeling error");

}

}

}

20)Collectionimport java.util.*;

class Collection

{

public static void main(String []args)

{

Vector v = new Vector();

System.out.println(v.capacity());

for(int i=0;i<10;i++)

{

v.addElement(i);

}

System.out.println(v.capacity());

v.addElement("A");

System.out.println(v.capacity());

System.out.println(v);

}

}

21)Arraylistimport java.util.*;

class Arraylist

{

public static void main(String []args)

{

ArrayList l = new ArrayList();

l.add('N');

l.add('A');

l.add('T');

l.add('R');

l.add('A');

l.add('J');

l.add('2');

l.add('0');

l.add('1');

System.out.println(l);

}

}

22)ENUMERATORimport java.util.*;

class Enumerator

{

public static void main(String args[])

{

//int i;

Vector v=new Vector();

for(int i=0;i<10;i++)

{

v.addElement(i);

}

Enumeration E=v.elements();

while(E.hasMoreElements())

{

Integer i=(Integer)E.nextElement();

if(i%2==0)

{

System.out.println(i);

}

}System.out.println(v);

}

}

23)Tryimport java.util.Scanner;

class Try

{

public static void main(String args[])

{

try

{

Scanner s=new Scanner (System.in);

int a,b,c;

System.out.println("enter a number");

a=s.nextInt();

System.out.println("enter a number");

b=s.nextInt();

c=a/b;

System.out.println(c);

}

catch(Exception a)

{

System.out.println("not zero in denominator");

}

}

}

24)Try +Finallyimport java.util.Scanner;

class Try2

{

public static void main(String args[])

{

try

{

Scanner s=new Scanner (System.in);

int a,b,c;

System.out.println("enter a number");

a=s.nextInt();

System.out.println("enter a number");

b=s.nextInt();

c=a/b;

System.out.println(c);

}

catch(Exception a)

{

System.out.println("not zero in denominator");

}

finally

{

System.out.println("exit");

}

}

}

25)Nested tryimport java.util.Scanner;

class Try3

{

public static void main(String args[])

{

try

{

Scanner s=new Scanner (System.in);

int a,b,c;

System.out.println("enter a number");

a=s.nextInt();

System.out.println("enter a number");

b=s.nextInt();

c=a/b;

System.out.println(c);

}

catch(Exception a)

{

try

{ int d,e,f;

Scanner s=new Scanner (System.in);

System.out.println("enter a number");

d=s.nextInt();

System.out.println("enter a number");

e=s.nextInt();

f=d+e;

System.out.println(f);

}

catch(Exception b)

{

System.out.println("error");

}

System.out.println("not zero in denominator");

}

finally

{

System.out.println("exit");

}

}

}

26)Try+Finally 2import java.util.Scanner;

class Try4

{

public static void main(String args[])

{

try

{

Scanner s=new Scanner (System.in);

int a,b,c;

System.out.println("enter a number");

a=s.nextInt();

System.out.println("enter a number");

b=s.nextInt();

c=a/b;

System.out.println(c);

}

catch(Exception a)

{

System.out.println("not zero in denominator");

}

finally

{

try

{ int d,e,f;

Scanner s=new Scanner (System.in);

System.out.println("enter a number");

d=s.nextInt();

System.out.println("enter a number");

e=s.nextInt();

f=d+e;

System.out.println(f);

}

catch(Exception b)

{

System.out.println("error");

}

System.out.println("exit");

}

}

}

27)Nested Try 2import java.util.Scanner;

class Try5

{

public static void main(String args[])

{

try

{

Scanner s=new Scanner (System.in);

int a,b,c;

System.out.println("enter a number");

a=s.nextInt();

System.out.println("enter a number");

b=s.nextInt();

c=a/b;

System.out.println(c);

try

{ int d,e,f;

System.out.println("enter a number");

d=s.nextInt();

System.out.println("enter a number");

e=s.nextInt();

f=d+e;

System.out.println(f);

}

catch(Exception ae)

{

System.out.println("error");

}

}

catch(Exception a4)

{

System.out.println("not zero in denominator");

}

finally

{

System.out.println("exit");

}

}

}

28)Palindrome digit or string. Code :- import java.util.Scanner;class palindrome{ public static void main(String arg[]) { int c,i; String a,b=""; Scanner D=new Scanner(System.in); System.out.println("enter a string:"); a=D.nextLine(); c=a.length(); for(i=c-1;i>=0;i--) { b=b+a.charAt(i); } if(a.equalsIgnoreCase(b)) { System.out.println("string is palindrome");

} else { System.out.println("string is not palindrome"); } }}

Output :-

29) A shop will give discount of 10 percent if the cost of purchased quantity is more than 1000.Ask user for quantity and suppose 1 unit will cost 100, judge and print total cost for user.

Code :-

import java.util.Scanner;class sell{ public static void main(String args[]) { float tot_cost,dis; int a,c; Scanner D =new Scanner(System.in); System.out.println("enter the quantity:"); a=D.nextInt();

c=a*100; if(c>1000) { dis=(c*10)/100; tot_cost=c-dis; System.out.println("total cost:"+tot_cost); } else { System.out.println("total cost:"+c); } }}

Output :-

30) Program for uppercase, lowercase, string equality, remove

whitespaces.Code :-

import java.lang.String;class string{ public static void main(String arg[]) { String s1="hellow"; String s2=s1.toUpperCase(); String s3=s2.toLowerCase(); System.out.println(s2); System.out.println(s3);

System.out.println(s2); System.out.println(s3.equals(s1)); System.out.println(s2.equals(s1));

String s5="HELLOW"; System.out.println(s5.equals(s1)); System.out.println(s5.equalsIgnoreCase(s1));

String s6=" hellow "; System.out.println(s6); System.out.println(s6.trim());

System.out.println(s1.replace('l','t')); System.out.println(s1.concat("world")); System.out.println(s1.indexOf('e')); System.out.println(s1.length()); System.out.println(s1.split(s1)); System.out.println(s1.replace('e','o'));

}}

Output :-

31) Exception handling example.sCode :-

import java.util.Scanner;

class exception

{ public static void main(String args[]) { Scanner sc=new Scanner(System.in); int i,j,k; try { System.out.println("enter the vaalue of i:"); i=sc.nextInt(); System.out.println("enter the vaalue of j:"); j=sc.nextInt(); k=i/j; System.out.println(k); } catch(ArithmeticException c) { System.out.println("zero division error"); } }}

Output :-

32) Print duplicate character from string.Code :-

import java.util.Scanner;class dup{ public static void main(String arg[]) { int i,j,b; String a; Scanner D =new Scanner(System.in); System.out.println("enter a string"); a=D.nextLine(); b=a.length(); for(i=0;i<b;i++) { for(j=i+1;j<b;j++) { if(a.charAt(i)==a.charAt(j)) { System.out.println(a.charAt(j)); break; } } } }}

Output :-

33) Take a value of length and breadth of rectangle from user and

check if it is square or not?

Code :-

import java.util.Scanner;class rec{ public static void main(String args[]) { int a,b; Scanner D =new Scanner(System.in); System.out.println("enter length:"); a=D.nextInt(); System.out.println("enter breadth:"); b=D.nextInt(); if(a==b) { System.out.println("it is a square:"); } else { System.out.println("it is not a square"); } }}

Output :-

34)for loop :

Code:

class add1

{

public static void main(String[] args)

{

int i, a=0;

for ( i=1;i<11;i++)

{

a=a+i;

System.out.println(a);

}

}

}

Output:

35) 1d and 2d array

Code:

class array

{

public static void main(String[] agrs)

{

int [][] a=new int [3][];

a[0]=new int[3];

a[1]=new int[2];

a[2]=new int[1];

a[0][0]=50;

a[0][1]=10;

a[0][2]=40;

a[1][0]=660;

a[1][1]=990;

a[2][0]=660;

System.out.println(a[0][0]);

System.out.println(a[0][1]);

System.out.println(a[0][2]);

System.out.println(a[1][0]);

System.out.println(a[1][1]);

System.out.println(a[2][0]);

}

}

Output:

36) Enter data in file

import java.io.*;

class file

{

public static void main(String args[])throws Exception

{

String str = "adsasdads";

FileWriter fw = new FileWriter("abc.txt");

for (int i=0;i<str.length();i++)

fw.write(str.charAt(i));

System.out.println("writting file");

fw.close();

//File f = new File("abc.txt");

//f.createNewFile();

//System.out.println(f.exists());

}

}

Output:

37) read data in file

Code:

class ReadFile

{

public static void main(String[] args) throws IOException

{ int ch;

FileReader fr=null;

try

{

fr = new FileReader("abc.txt");

}

catch (FileNotFoundException fe)

{

System.out.println("File not found");

}

while ((ch=fr.read())!=-1)

System.out.print((char)ch);

fr.close();

}

}

Output:

38)

Code:

class a

{

int m1()

{

int a=10;

System.out.println(a);

return a;

}

}

class b extends a

{

void b()

{

int a=24;

int b=super.m1();

System.out.println(b);

System.out.println(a);

}

}

class sp

{

public static void main(String args[])

{

b a = new b();

a.m1();

}

}

Ouput:

39)Adiition through scanner class

Code:

import java.util.Scanner;

class two

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

int a;

System.out.print("enter value:");

a=sc.nextInt();

int b;

System.out.print("enter value:");

b=sc.nextInt();

int c;

c=a+b;

System.out.println("The addition is:");

System.out.println(c);

}

}

Ouput

:

40) To shoe derived class.

Code:

class Base {

public void show() {

System.out.println("Base::show() called");

}

}

class Derived extends Base {

public void show() {

System.out.println("Derived::show() called");

}

}

class Main {

public static void main(String[] args) {

Base b = new Derived();;

b.show();

}

}

Ouput: