Your First Program

Don't know anything about programming don't worry as you read this blog u will learn to program within few weeks and most importantly you will enjoy it.So , you have decided to learn programming so first you need to know what is a program.A program is an implementation to an algorithm,so whats an algorithm ,it is a set of steps written to perform a particular task.like, an algorithm to add two numbers. Step 1:Take the first number. Step 2:Take the second number. Step 3: add them . Step 4:Display the result. So, to implement the above algorithm in a program you need to choose a programming language and since C is a basic programming language and yet very powerful we choose C , to start the programming. You just need to know a few things to use C,they are: 1.Variables : they store data. 2.Datatypes:they represents the type of data stored. 3.Operators: they are used for manipulations. Lets start with implementing the algorithm. int a=10; int b=20; int c=a+b; printf("%d",c);

for each

Guess the output: public class ForEachDemo { public static void main(String args[]){ int a[]={1,8,1,1,1,1,1,1,1,1}; for(int i:a)//for each is for arrays display System.out.println(a[i]); } } Output: 8 1 8 8 8 8 8 8 8 8




Guess the output: public class ForEachDemo { public static void main(String args[]){ int a[]={1,8,1,1,1,1,1,1,1,1}; for(int i:a)//for each is for arrays display System.out.println(i); } }
output:
1 8 1 1 1 1 1 1 1 1

processing streams

perform some sort of operation such as buffering or encoding as they reaad and write.

Data sink stream

they are used to read from or write to specialized data sink such as files pipes strings.

java.io package

contain all classes that are required to handle input and output

character stream

reader and writer stream are character stream

byte stream

Input and output stream are byte stream.eg:images ,sounds.
2 types:
1.ObjectInputStream
2.ObjectOutputStram