Abstraction: the word
 
Abstraction: in programming languages 

      Ask Alice
 
           Wally's View 




public class abstraction101 {

    public static void main(String[] args){
        int i1=1;
        int i2=3;
        int [] a1={1,2};
        int [] a2={3,4};
        int [] a3 =new int[3];
        System.out.println("\nThe ints");
        System.out.println(i2);
        i2=i1;
        System.out.println(i2);
        i1=5;
        System.out.println(i2);
        System.out.println("-----------------Now the Arrays");
        System.out.println(a2[0]);
        a2=a1;   //a1 and a2 now point to the same array of 2 int s. We are not copying array elements.
        System.out.println(a2[0]);
        a1[0]=5;
        System.out.println(a2[0]);
        System.out.println("---------------------\nThe length of a3 is "+a3.length);
        a3=a1;
        System.out.println("The length of a3 is "+a3.length+"\n");
    }
}