bilangan prima

import java.io.*;
class bilangan_prima
{
public static void main(String[] args) throws Exception
{
System.out.println("PROGRAM MENCARI BILANGAN PRIMA");
System.out.println("=================================");
System.out.println("Nama : MADE ADI PUTRA");
System.out.println("NIM : 080020015");
System.out.println("Jurusan : T. INFORMATIKA");
System.out.println("=================================");
String batas;
int i, x, y,b;
DataInputStream dis = new DataInputStream (System.in);
System.out.print("Masukkan batas angka : ");
batas=dis.readLine();
b=Integer.parseInt(batas);
System.out.println("Deret Bilangan Prima : ");
for (i=1; i < b; i++ )
{
for (x=2; x
{
y = i%x;
if (y==0)
{
break;
}
}
if(i == x)
{
System.out.print(" "+i);
}
}
}
}