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  1. class HelloWorld
  2. {
  3.     public static void main(String[] args) {
  4.  
  5.         Foo tmp = new Foo(10, 2);
  6.  
  7.         Foo foo = (Foo)tmp.clone();
  8.  
  9.         if (foo != null) {
  10.             System.out.println(foo.getClass());
  11.             System.out.println("foo.p = " + foo.getP());
  12.             System.out.println("foo.n = " + foo.getN());
  13.             System.out.println("foo.mul = " + foo.mul());
  14.         } else {
  15.             System.out.println("NULL!");
  16.         }
  17.  
  18.         System.out.println(tmp.equals(foo));
  19.  
  20.     }
  21.  
  22.     static class Hoge implements Cloneable {
  23.  
  24.         int n;
  25.         int p;
  26.  
  27.         Hoge() {
  28.         }
  29.  
  30.         Hoge(int n, int p) {
  31.             this.n = n;
  32.             this.p = p;
  33.         }
  34.  
  35.         public Object clone() {
  36.             try {
  37.                 System.out.println(this.getClass());
  38.                 Hoge h = this.getClass().newInstance();
  39.                 h.n = n;
  40.                 h.p = p;
  41.                 return h;
  42.             } catch (Exception e) {
  43.                 return null;
  44.             }
  45.         }
  46.  
  47.         public int getN() {
  48.             return n;
  49.         }
  50.  
  51.         public int getP() {
  52.             return p;
  53.         }
  54.     }
  55.  
  56.     static class Foo extends Hoge {
  57.  
  58.         Foo() {
  59.         }
  60.  
  61.         Foo(int n, int p) {
  62.             super(n, p);
  63.         }
  64.  
  65.         public int mul() {
  66.             return n * p;
  67.         }
  68.  
  69.     }
  70. }
  71.  
Success #stdin #stdout 0.07s 380224KB
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Standard input is empty
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class HelloWorld$Foo
class HelloWorld$Foo
foo.p = 2
foo.n = 10
foo.mul = 20
false
https://ideone.com/saLOt7
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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