Class Lingkaran (Variabel Method)

public class Lingkaran {
static int jari = 0;
int PI;
int r;
int Luas;
public Lingkaran(int nilai){
this.r = jari;
}
public void info(){
System.out.println("jari:" + this.r);
System.out.println("Luas Lingkaran:" + Luas);
System.out.println("");
}
}