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8/12/2019 Write a Program for Finding Length of an Array
http://slidepdf.com/reader/full/write-a-program-for-finding-length-of-an-array 1/29
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:-
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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:-
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3. Write a program for reverse number.
class rev
{
public static void main(String args[])
{
int arr=1234;
int len=0,i;
while(arr>0)
{ System.out.print(arr%10);
arr=arr/10;
}
}
}
Output:-
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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;
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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:-
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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");
}
}
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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;
}
}
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class overload
{
public static void main(String args[])
{
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:-
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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
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void show()
{
System.out.println("k: " + k);
}
}
class override{
public static void main(String args[])
{
B subOb = new B(1, 2, 3);
subOb.show(); // this calls show() in B
}
}
Output:-
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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
{
public static void main(String args[])
{
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student s1=new student(200,"Astbhuja");
s1.display();
}
}
Output :-
9. Write a program for Armstrong.
class arm
{
public static void main(String args[])
{
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)
{
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c=n%10;
n=n/10;
m=m+c*c*c;
}
if(m==lp)
System.out.println("the armstrong is="+lp);m=0;
}
}
}
Output:-
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10. Write a program for print the length of string andreverse of that string.
class revstr
{
public static void main(String args[])
{
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:-
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}
catch(Exception e)
{
}
}
}
public class thread1
{
public static void main(String args[])
{
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:-
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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>
*/
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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)
{
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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();
}
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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:-
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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");
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}
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
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from class a
16.PROGRAM FOR SERVLET
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MyServlet extends HttpServlet
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{
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">
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</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:-
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17.PROGRAM FOR MENU ITEAM
import java.awt.*;
import java.awt.event.*;
class Nawframe extends Frame implements ActionListener
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{
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);
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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[])
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{
Nawframe d=new Nawframe("My Frame");
d.setSize(100,100);
d.setVisible(true);
}
}
output:-
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