Program awal Java (Intro)

public class Contoh2 {
 public static void main(String[] args) {
    int a,b;
    a=15;b=25;
    System.out.println("a");
    System.out.println(a);
    System.out.println("b");
    System.out.println("Nilai a = "+a);
    System.out.println("Nilai b = "+b);
    System.out.println("Nilai a = "+a+" dan nilai b= "+b);
 }
}