Java workfile

HELLOWORLDAPP

/**
 * The HelloWorldApp class implements an application that
 * simply prints "Hello World!" to standard output.
 */



class HelloWorldApp
{
    public static void main(String[] args)
    {
        System.out.println("Hello World!"); // Display the string.
        }
}

HBBRID

/* Program for implementing multiple inheritance*/

class student
{
  int rno;
 void getnumber(int n)
 {
 rno=n;
 }
 void putnumber()
 {
 System.out.println("Roll Number="+rno);
 }
}


class test extends student
{
float part1,part2;
 void getmarks(float m1,float m2)
 {
 part1=m1;
 part2=m2;
 }
void putmarks()
{
 System.out.println("Marks Obtained");
 System.out.println("Part1="+part1);
 System.out.println("Part2="+part2);
 }
}


interface sports
{
 float sportwt=6.0f;
 void putwt();
}



class results extends test implements sports
{
float total;
 public void putwt()
 {
 System.out.println("Sports wt="+sportwt);
 }
 void display()
 {
 total=part1+part2+sportwt;
 putnumber();
 putmarks();
 putwt();
 System.out.println("Total Score="+total);
 }
}



class hybrid
{
public static void main(String args[])
 {
 results student1=new results();
 student1.getnumber(123);
 student1.getmarks(27.5F,33.0F);
 student1.display();
 }
}

INHERIT

/*Program to enter student details ina base class and inherit
it to the super class called office.*/

import java.io.*;
class  student
{
int regno;
String name,grade,branch;
void read()
  {
  DataInputStream x=new DataInputStream(System.in);
  try
   {
    System.out.println("Enter regnumber");
    regno=Integer.parseInt(x.readLine());
    System.out.println("Enter student name");
    name=x.readLine();
   System.out.println("Enter branch");
   branch=x.readLine();
   System.out.println("Enter grade");
   grade=x.readLine();
  }
catch(Exception e)
   {
   }
 }
}

class office extends student
{
int deptno;
void display()
  {
   DataInputStream x=new DataInputStream(System.in);
   try
    {
     System.out.println("Enter deptno");
     deptno=Integer.parseInt(x.readLine());
    }
    catch(Exception e)
   {
   }
   System.out.println("Name="+name);
   System.out.println("Branch="+branch);
   System.out.println("Grade="+grade);
   System.out.println("Deptno="+deptno);
  }
}

class inherit
{
   public static void main(String arg[])
   {
     office s1=new office();
     s1.read();
     s1.display();
  }
}


LOOP1

/* Program to print a message
5 times using while loop*/

import java.io.*;

class loop1
{
public static void main(String arg[])
{
int i=0;
while(i<=4)
{
System.out.println("Digital Media");
i++;
}
}
}

LOOP 2

/* Program to print a message
5 times using while loop*/

import java.io.*;

class loop2
{
public static void main(String arg[])
{
int i=0;

do
{
 System.out.println("Digital Media");
 i++;
}while(i<=4);

}
}

LOOP3

/* Program to print a message
5 times using while loop*/

import java.io.*;

class loop3
{
public static void main(String arg[])
{
int i;

for(i=0;i<=4;i++)
{
 System.out.println("Digital Media");
}

}
}

MAIN1


import java.io.*;



class student
{
int rno;
String name,branch;

void get()
{

try
 {
 DataInputStream x=new DataInputStream(System.in);
 System.out.println("Enter rollnumber");
 rno=Integer.parseInt(x.readLine());
 System.out.println("Enter Name");
 name=x.readLine();
 System.out.println("Enter branch");
 branch=x.readLine();
 }
catch(Exception e)
 {
 }
}
void display()
{
System.out.println("");
System.out.println("Student Detail");
System.out.println("Roll Number="+rno);
System.out.println("Name="+name);
System.out.println("Branch="+branch);
}
}








class exam
{
int regno,mark;
void read()
{
try
 {
 DataInputStream x=new DataInputStream(System.in);
 System.out.println("Enter Registration Number");
 regno=Integer.parseInt(x.readLine());
 System.out.println("Enter Mark");
 mark=Integer.parseInt(x.readLine());
 }
catch(Exception e)
 {
 }
}

void write()
{
System.out.println("Exam Details");
System.out.println("RegistrationNumber="+regno);
System.out.println("Mark="+mark);
}
}






class main1
{
public static void main(String arg[])
{
student s=new student();
exam e=new exam();
s.get();
e.read();
s.display();
e.write();
}
}


MATH


/* Program to find addition,Subtraction,Multiplcation
and division of two numbers */
import java.io.*;
class math
{
public static void main(String arg[])
{
float number1,number2,result;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter first number");
number1=Float.parseFloat(x.readLine());
System.out.println("Enter second number");
number2=Float.parseFloat(x.readLine());
result=number1+number2;
System.out.println("Addition="+result);
result=number1-number2;
System.out.println("Subtraction="+result);
result=number1*number2;
System.out.println("Multiplication="+result);
result=number1/number2;
System.out.println("Division="+result);
}
catch(Exception  e)
{
}
}
}

MATRIX

/* Program to find addition of two
matrix by using an two dimensional array */

import java.io.*;


class matrix
{
public static void main(String arg[])
{
int a[][]=new int[20][20];
int b[][]=new int[20][20];
int add[][]=new int[20][20];
int i,j,r,c;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter row size of the matrix");
r=Integer.parseInt(x.readLine());
System.out.println("Enter column size of the matrix");
c=Integer.parseInt(x.readLine());

//Entering elements of the first matrix


System.out.println("Enter elements of the first matrix");
for(i=0;i
{
for(j=0;j
{
a[i][j]=Integer.parseInt(x.readLine());
}
}


//Entering elements of the  second matrix


System.out.println("Enter elements of the second matrix");
for(i=0;i
{
for(j=0;j
{
b[i][j]=Integer.parseInt(x.readLine());
}
}


//Finding addition of two matrix


for(i=0;i
{
for(j=0;j
{
add[i][j]=a[i][j]+b[i][j];
}
}




//Printing addition of matrix


for(i=0;i
{
for(j=0;j
{
System.out.print(add[i][j]);
System.out.print(" ");
}
System.out.println("");
}

}
catch(Exception e)
{
}

}
}


NESTED


/* Program to print following pattern using
nested for loop.

*
**
***
****
*****


*/

import java.io.*;

class nested
{
public static void main(String arg[])
{
int i,j;
for(i=0;i<5;i++)
{
 for(j=0;j<=i;j++)
 {
  System.out.print("*");
  System.out.print(" ");
 }
System.out.println("");
}

}
}

REVERSE

/*Program to find reverse of a
number by using while loop */

import java.io.*;

class reverse
{
public static void main(String arg[])
{
int r,rev=0,n;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter a number");
n=Integer.parseInt(x.readLine());

while(n>0)
{
  r=n%10;
  rev=rev*10+r;
  n=(int)(n/10);
}

System.out.println("Number Reverse="+rev);
}
catch(Exception e)
{
}
}
}


SORT

/* Program to enter n numbers into an array
and sort it in ascending order*/

import java.io.*;

class sort
{
public static void main(String arg[])
{
int a[]=new int[50];
int i,j,n,t;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter limit value");
n=Integer.parseInt(x.readLine());
System.out.println("Enter array elements");
for(i=0;i
{
 a[i]=Integer.parseInt(x.readLine());
}

for(i=0;i
{
 for(j=i+1;j
 {
  if(a[i]>a[j])
  {
   t=a[i];
   a[i]=a[j];
   a[j]=t;
  }
 }
}

System.out.println("Array elements in asceding order");

for(i=0;i
{
System.out.println(a[i]);
}
}

catch(Exception e)
{
}
}
}

STRING1

import java.io.*;

class string1
{
public static void main(String arg[])
{
String pass,user;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter User Name");
user=x.readLine();
System.out.println("Enter Password");
pass=x.readLine();

if(user.equalsIgnoreCase("digital media") && pass.equals("dmt"))
{
System.out.println("Login ");
}
else
{
System.out.println("Invalid user name or password");
}
}
catch(Exception e)
{
}
}
}

STUDENT

/* Program to enter Rollnumber,Name and Branch of a student */

import java.io.*;
class student
{
public static void main(String arg[])
{
int rno;
String name,branch;
try
{
DataInputStream x=new DataInputStream(System.in);
System.out.println("Enter rollnumber");
rno=Integer.parseInt(x.readLine());
System.out.println("Enter student name");
name=x.readLine();
System.out.println("Enter branch");
branch=x.readLine();
System.out.println("Rollnumber="+rno);
System.out.println("Name="+name);
System.out.println("Branch="+branch);
}
catch(Exception e)
{}
}
}

THREAD1

import java.io.*;

class A extends Thread
{
public void run()
{
int i;
try
{
for(i=0;i<5;i++)
{
if(i==1)
{
stop();
}
System.out.println("Value of i="+i);
}
}
catch(Exception e)
{
}
}
}

class B extends Thread
{
public void run()
{
int j;
try
{
for(j=0;j<5;j++)
{
if(j==3)
{
sleep(3000);
}
System.out.println("Value of j="+j);
}
}
catch(Exception e)
{
}
}
}

class C extends Thread
{
public void run()
{
int k;
for(k=0;k<5;k++)
{
System.out.println("Value of k="+k);
}
}
}

class thread1
{
public static void main(String arg[])
{
A obj1=new A();
B obj2=new B();
C obj3=new C();
obj1.start();
obj2.start();
obj3.start();
}
}