Write a Program for Finding Length of an Array

8/12/2019 Write a Program for Finding Length of an Array

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1. Write a program for finding length of an array.

class length

{

public static void main(String args[]){

int arr[]={1,2,3,4,5,6,7,8,9};

int len=0,i;

len=arr.length;

System.out.println("The length of Array=" +len);

}

}

Output:-



2.Write program for swap the value.

class swap{

public static void main(String args[])

{

int a=10,b=20;

System.out.println("Before Swaping");

System.out.println("The value of a=" +a +"the value of b=" +b);

System.out.println("After Swaping");

a=a+b;b=a-b;

a=a-b;

System.out.println("The value of a=" +a +"the value of b=" +b);

}

}

Output:-



3. Write a program for reverse number.

class rev

{


{

int arr=1234;

int len=0,i;

while(arr>0)

{ System.out.print(arr%10);

arr=arr/10;

}

}

}

Output:-



4.Write a program for inheritance.

//Program for java inheritance.

// Create a superclass.

class A

{

int i, j;void showij()

{

System.out.println("i and j: " + i + " " + j);

}

}

// Create a subclass by extending class A.

class B extends A

{

int k;

void showk()

{

System.out.println("k: " + k);

}

void sum()

{

System.out.println("i+j+k: " + (i+j+k));

}

}

class inheritance

{public static void main(String args[])

{

A superOb = new A();

B subOb = new B();

// The superclass may be used by itself.

superOb.i = 10;



superOb.j = 20;

System.out.println("Contents of superOb: ");

superOb.showij();

System.out.println();

/* The subclass has access to all public members of

its superclass. */subOb.i = 7;

subOb.j = 8;

subOb.k = 9;

System.out.println("Contents of subOb: ");

subOb.showij();

subOb.showk();

System.out.println();

System.out.println("Sum of i, j and k in subOb:");

subOb.sum();

}

}

/*The output from this program is shown here:

Contents of superOb:

i and j: 10 2

Contents of subOb:

i and j: 7 8

k: 9

Sum of i, j and k in subOb:

i+j+k: 24

As you can see, the subclass B includes all of the members of its superclass, A. Thisis why subOb can access i and j and call showij( ). Also, inside sum( ), i and j can be

referred to directly, as if they were part of B.*/

Output:-



5.Write a program for palindrome no.

import java.io.*;

class palin

{

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

{

InputStreamReader r1=new InputStreamReader(System.in);

BufferedReader read=new BufferedReader(r1);int n,n1,a,inv=0;

System.out.print("Enter a number:");

n=Integer.parseInt(read.readLine());

n1=n;

while(n!=0)

{

a=n%10;

inv=inv*10+a;

n=n/10;

}

if(inv==n1)

System.out.print("Palindrome Number");

else

System.out.print("Not a Palindrome Number");

}

}



Output:-

6. Write a program for overloading.

// Demonstrate method overloading.

class OverloadDemo

{

void test()

{

System.out.println("No parameters");

}// Overload test for one integer parameter.

void test(int a)

{

System.out.println("a: " + a);

}

// Overload test for two integer parameters.

void test(int a, int b)

{

System.out.println("a and b: " + a + " " + b);

}

// overload test for a double parameter

double test(double a)

{

System.out.println("double a: " + a);

return a*a;

}

}



class overload

{


{

OverloadDemo ob = new OverloadDemo();double result;

// call all versions of test()

ob.test();

ob.test(10);

ob.test(10, 20);

result = ob.test(123.25);

System.out.println("Result of ob.test(123.25): " + result);

}

}

/*This program generates the following output:

No parameters

a: 10

a and b: 10 20

double a: 123.25

Result of ob.test(123.25): 15190.5625*/

Output:-



7. Write a program for overrinding.

// Method overriding.

class A

{

int i, j;

A(int a, int b)

{

i = a;

j = b;

}

// display i and j

void show()

{

System.out.println("i and j: " + i + " " + j);

}

}

class B extends A

{

int k;B(int a, int b, int c)

{

super(a, b);

k = c;

}

// display k – this overrides show() in A



void show()

{

System.out.println("k: " + k);

}

}

class override{


{

B subOb = new B(1, 2, 3);

subOb.show(); // this calls show() in B

}

}

Output:-



8.Write a program for package.

/* package*/

package mypack;

public class student

{

int rno;

String name;public student(int r,String n)

{

rno=r;

name=n;

}

public void display()

{

System.out.println("R.No. is " + rno +" and name is " +name);

}

}

import mypack.*;

class javapackage

{


{



student s1=new student(200,"Astbhuja");

s1.display();

}

}

Output :-

9. Write a program for Armstrong.

class arm

{


{

int up=0,lp=0,j=0,n=0,m=0,c=0,a=0,b=0;

a=Integer.parseInt(args[0]);

b=Integer.parseInt(args[1]);if(a>b)

{

up=a;

lp=b;

}

else

{

up=b;

lp=a;

}

System.out.println("Armstrong No between " +lp +" to " +up);for(;lp<=up;lp++)

{

n=lp;

while(n>=1)

{



c=n%10;

n=n/10;

m=m+c*c*c;

}

if(m==lp)

System.out.println("the armstrong is="+lp);m=0;

}

}

}

Output:-



10. Write a program for print the length of string andreverse of that string.

class revstr

{


{

StringBuffer arr=new StringBuffer("astbhuja pandey");

int len=0,i;

len=arr.length();

System.out.println("the Length of string=" +len);

arr.reverse();

System.out.println("reverse String =" +arr);

}

}

Output:-



}

catch(Exception e)

{

}

}

}

public class thread1

{


{

new mythread();

int x;

x=0;

try

{

while(x<15)

{

x++;

System.out.println(x);

Thread.sleep(1000);

}

}

catch(Exception e)

{

System.out.println(e);}

}

}

Output:-



12. Write a program print the following applet.Circle

Triangle

Line

import java.awt.*;

import java.applet.*;

/*

<applet code="apple" width=300 height=300>

</applet>

*/



public class apple extends Applet

{

public void paint(Graphics g)

{

g.drawOval(40,40,140,140);

g.drawLine(20,200,100,250);g.drawLine(10,10,10,80);

g.drawLine(10,10,55,45);

g.drawLine(10,80,55,45);

}

}

Output:-

13. PROGRAM FOR CONSTRUCTOR

class Constructor

{

int age;

String name;

public Constructor(int a,String s)

{



age=a;

name=s;

}

}public class Info

{

public static void main(String[] as)

{

Constructor con=new Constructor(25,"Anand Mishra");

System.out.println("Name of Emp: "+con.name);

System.out.println("Age of Emp: "+con.age);}

}

Output:-

Name of Emp: Anand Mishra

Age of Emp: 25

14. PROGRAM FOR INTERFACE

interface a{

public void fun();

public void sun();

}



class b implements a{

public void fun()

{

System.out.println("from class fun");

}

public void sun()

{

System.out.println("from class sun");

}

}

class Inter{

public static void main(String a[])

{

b n=new b();

n.sun();

n.fun();

}

}

Output:-



c:\>javac Inter.java

c:\>java Inter

from class sun

from class fun

15. PROGRAME FOR ABSTRACT METHOD

abstract class a{

public void fun()

{

System.out.println("from class a");



}

public abstract void sun();

}

class b extends a{

public void sun()

{

System.out.println("from class b");

}

}

class Abs{

public static void main(String a[])

{

b n=new b();

n.sun();

n.fun();

} }

output:-

c:\>javac Abs.java

c:\>java Abs

from class b



from class a

16.PROGRAM FOR SERVLET

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class MyServlet extends HttpServlet



{

public void doGet(HttpServletRequest req,HttpServletResponse

res)throws ServletException,IOException

{

String Name =req.getParameter("txtName");

res.setContentType("text/html");

PrintWriter out = res.getWriter();

out.println("Welcome " + Name);

out.close();

}

}

HTML CODE

<html>

<head>

<title> First web application </title>

</head>

<body>

<form method="get" action="welcomeservlet">

name <Input Type ="text" name ="txtName"> <br>

<input type ="Submit" Value = "Submit">



</form>

</body>

</html>

XML CODE

<web-app>

<servlet>

<servlet-name>s1</servlet-name>

<servlet-class>MyServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>s1</servlet-name>

<url-pattern>welcomeservlet</url-pattern>

</servlet-mapping>

</web-app>

output:-



17.PROGRAM FOR MENU ITEAM

import java.awt.*;

import java.awt.event.*;

class Nawframe extends Frame implements ActionListener



{

MenuBar mb;

Menu mfile,medit;

MenuItem mnew,mexit;

Nawframe(String f)

{

super(f);

mb=new MenuBar();

mfile=new Menu("File");

medit=new Menu("Edit");

mnew=new MenuItem("New");

mexit=new MenuItem("Exit");

mnew.addActionListener(this);

mexit.addActionListener(this);

mfile.add(mnew);

mfile.add(mexit);

mb.add(mfile);



mb.add(medit);

setMenuBar(mb);

}

public void actionPerformed(ActionEvent w)

{

if(w.getSource()==mexit)

{

System.exit(0);

}

else if(w.getSource()==mnew)

{

Nawframe n=new Nawframe("New Frame");

n.setSize(100,100);

n.setVisible(true);

}

}

}

public class Menitem

{

public static void main(String s[])



{

Nawframe d=new Nawframe("My Frame");

d.setSize(100,100);

d.setVisible(true);

}

}

output:-

Write a Program for Finding Length of an Array

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