tests/InstanceOf2.java

   1 package tests;
   2
   3 public class InstanceOf2 {
   4         public static void main(String []args) {
   5                 System.out.printf("x = new InstanceOf2_local;\n");
   6                 Instance1 x = new InstanceOf2_local();
   7                 checkInstance(null instanceof Instance1, "null", "Instance1");
   8                 checkInstance(x instanceof Instance1, "x", "Instance1");
   9                 checkInstance(x instanceof Instance2, "x", "Instance2");
  10                 checkInstance(x instanceof InstanceOf2_local, "x", "InstanceOf2_local");
  11                 checkInstance(x instanceof Object, "x", "Object");
  12                 checkInstance(x instanceof InstanceOf2_local2, "x", "InstanceOf2_local2");
  13
  14                 System.out.printf("\n\n");
  15                 System.out.printf("y = new InstanceOf2_local2;\n");
  16                 Object y = new InstanceOf2_local2();
  17                 checkInstance(null instanceof Instance1, "null", "Instance1");
  18                 checkInstance(y instanceof Instance1, "y", "Instance1");
  19                 checkInstance(y instanceof Instance2, "y", "Instance2");
  20                 checkInstance(y instanceof InstanceOf2_local, "y", "InstanceOf2_local");
  21                 checkInstance(y instanceof Object, "y", "Object");
  22                 checkInstance(y instanceof InstanceOf2_local2, "y", "InstanceOf2_local2");
  23         }
  24
  25         public static void checkInstance(boolean cond, String obj, String classname) {
  26                 System.out.printf(obj);
  27                 if (cond) {
  28                         System.out.printf(" is instance of ");
  29                         System.out.printf(classname);
  30                         System.out.printf(" :-)\n");
  31                 } else {
  32                         System.out.printf(" is *not* instance of ");
  33                         System.out.printf(classname);
  34                         System.out.printf(" :-(\n");
  35                 }
  36         }
  37 }
  38
  39
  40 class InstanceOf2_local extends Instance1 {
  41 }
  42
  43 class InstanceOf2_local2 extends InstanceOf2_local {
  44 }