Prime Number in Java
This Java programming tutorial will be read how to get prime number. First
of all we will define a class "Prime Number". Java
I/O package has a input stream and a output stream in which input stream is used
for reading the stream and memory allocating and the output stream used for
writing bytes. As in this program we are going to insert certain instruction by
creating buffer reader class. Here we have to create a buffer for the string
class that can be used to instantiate a changeable object for storing and
processing a string of character. Now use the ParseInt method for converting the
parses the string argument and define 'num' as an integer.
Now applying in this program two for loop conditions
first condition as integer i=1, i< num and i++ is increment and second
condition with as integer j=2, j<i, or j++ increment operator. So output
result will be like int n=i%j.
Here is the code of the Program
import java.io.*;
class PrimeNumber {
public static void main(String[] args) throws Exception{
int i;
BufferedReader bf = new BufferedReader(
new InputStreamReader(System.in));
System.out.println("Enter number:");
int num = Integer.parseInt(bf.readLine());
System.out.println("Prime number: ");
for (i=1; i < num; i++ ){
int j;
for (j=2; j<i; j++){
int n = i%j;
if (n==0){
break;
}
}
if(i == j){
System.out.print(" "+i);
}
}
}
}
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