primeno program in java

import javax.swing.JOptionPane;
public class primeno
{
public static void main(String ar[])
{
primeno p= new primeno();
p.display();
}
//--------Prime no------------------
public void display()
{
System.out.println("1\n2\n3");
int count,limit=Integer.parseInt(JOptionPane.showInputDialog("Enter limit upto Prime no. you want!!"));
for(int j=4;j<=limit;j++)
{
count=0;
for(int i=2;i<=j/2;i++)
{
if(j%i==0) {count=1;break;}
}
if(count==0)System.out.println(j);
}
}
//-----------------------------------
}