Java program to find SUM of the Number

import java.io.*;
class sumdigits
{
public static void main(String args[]) throws IOException
{
int num,rem,sum=0;
DataInputStream s=new DataInputStream(System.in);
System.out.println("enter the number as u wish");
num=Integer.parseInt(s.readLine());
while(num>0)
{
rem=num%10;
sum=sum+rem;
num=num/10;
}
System.out.println("the sum of numbers is "+sum);
}
}

Java program for Hybrid Inheritance

class student
{
int rm;
void getnumber(int n)
{
rm=n;
}
void putnumber()
{
System.out.println("Roll no"+rollnum);
}
}
class test extends student
{
float s1,s2,s3,s4;
void getmarks(float m1,float m2)
{
s1=m1;
s2=m2;
}
void putmarks()
{
System.out.println("Marks obtained");
System.out.println("sub1 marks"+s1);
System.out.println("sub2 marks"+s2);
}
}
interface sports
{
float sportswt=6.0f;
void putwt();
}
class result extends text implements sports
{
float total;
public void putwt()
{
System.out.println("sports weightage"+sportwt);
}
void display()
{
total=s1+s2+sportwt;
putnumber();
putmarks();
putwt();
System.out.println("Toatal score is"+total);
}
}
class Hybrid
{
public static void main(String args[])
{
result student1=new result();
student1.getnumber(1234);
student1.getmarks(22.44f,33.66f);
student1.display();
}
}

Java program to push,pop,search,peek,display element

import java.io.*;
import java.util.*;
class lab5
{
 public static void main(String args[])throws IOException
{
 int ch;
 System.out.println("prog to object of a stack and use all methods ");
 Stack st=new Stack();
 InputStreamReader ins=new InputStreamReader(System.in);
 BufferedReader br=new BufferedReader(ins);
 String s=new String();
do
{
 System.out.println(".....more......");
 System.out.println("1.PUSH");
 System.out.println("2.POP");
 System.out.println("3.PEEK");
 System.out.println("4.DISPLAY");
 System.out.println("5.SEARCH");
 System.out.println("6.EXIT");
 System.out.println("ENTER UR CHOICE");
ch=Integer.parseInt(br.readLine());
switch(ch)
{
 case 1: System.out.println("enter the ele to PUSH into stack;");
            s=br.readLine();
              st.push(new Integer(s));
                break;
 case 2:try
        {
            System.out.println("enter popped is"+st.pop());
        }
        catch(Exception e)
        {
                System.out.println("STACK is empty!");
        }
              break;
case 3:try{
            Integer a=(Integer)st.peek();
            System.out.println("Element on the top of the STACK is"+a);
           }
           catch(Exception e)
           {
               System.out.println("empty STACK!");
            }
            break;
case 4: System.out.println(st);
        break;
case 5: System.out.println("enter the ele to search:");
        int c=Integer.parseInt(br.readLine());
        int k=st.search(new Integer(c));
        if(k==-1)
             System.out.println("ele not found");
         else
          System.out.println("ele found at pos:"+k);
           break;
case 6: System.out.println("Exiting.");
          System.exit(0);
          break;
}
}
while(ch<6);
}}

Java program to produce Random no

import java.util.Random;
import java.io.*;
public class Randomno1
{
public static void main(String args[])throws IOException
{
 Random obj=new Random();
for(int i=0;i<50;i++)
{
float rint=obj.nextFloat()*50;
if(rint<50)
rint=rint+50;
System.out.println(rint);
}
}
}