Java中的变量

public class DemoJava {
   public static void main(String []args) {

        int a;
        int b;

        a = 10;
        b = 20;

        System.out.println("Value of a = " + a);
        System.out.println("Value of b = " + b);

        System.out.println("Value of a = " + a + " and value of b = " + b);     
   }
}