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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 	class J{
  13.    private int x, y;
  14.    public J() { x = y = 3;}
  15.    public void fun() { x = y = 6; }
  16.    public int back() { return 1; }
  17.    public String toString() { 
  18.       return x + " " + y;
  19.    }
  20. }
  21.  
  22. class K extends J {
  23.    public void fun() { System.out.println(back()); }
  24.    public String toString() { 
  25.       return "class K " + super.toString();
  26.    }
  27. }
  28.  
  29. class M{
  30.    private int x, y;
  31.    public M() { x=8;  y=1; }
  32.    public double fun() { return x; }
  33.    public double go() { return y; }
  34.    public double back() { return fun(); }
  35.    public String toString() { 
  36.       return x + " " + y;
  37.    }
  38. }
  39.  
  40. class N extends M{
  41.    public N() { }
  42.    public double fun() { return 7; }
  43.    public double go() { return super.back(); }
  44.    public double back() { return 2; }
  45.    public String toString() { 
  46.       return super.toString();
  47.    }
  48. }
  49.  
  50. //////////////////////////////////////////////
  51. //test code in the main method
  52. J one = new J();
  53. System.out.println(one);
  54. one = new K();
  55. one.fun();
  56. System.out.println(one);
  57.  
  58. M two = new M();
  59. System.out.println(two.go());
  60. System.out.println(two.back());
  61. System.out.println(two.fun());
  62. System.out.println(two);
  63. two = new N();      
  64. System.out.println(two.go());
  65. System.out.println(two.back());
  66. System.out.println(two.fun());
  67. System.out.println(two);
  68.  
  69. 	}
  70. }
Success #stdin #stdout 0.12s 36440KB
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stdin
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Standard input is empty
stdout
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3 3
1
class K 3 3
1.0
8.0
8.0
8 1
7.0
2.0
7.0
8 1
https://ideone.com/btLgTr
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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