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  1. interface InterfaceComponent {
  2. 	void doOperation();
  3. }
  4.  
  5. class MainComponent implements InterfaceComponent {
  6.  
  7. 	@Override
  8. 	public void doOperation() {
  9. 		System.out.print("World!");
  10. 	}	
  11. }
  12.  
  13. abstract class Decorator implements InterfaceComponent {
  14. 	protected InterfaceComponent component;
  15.  
  16. 	public Decorator (InterfaceComponent c) {
  17. 		component = c;
  18. 	}
  19.  
  20. 	@Override
  21. 	public void doOperation() {
  22. 		component.doOperation();
  23. 	}
  24.  
  25.         public void newOperation() {
  26.                 System.out.println("Do Nothing");
  27.         }
  28. }
  29.  
  30. class DecoratorSpace extends Decorator{
  31.  
  32. 	public DecoratorSpace(InterfaceComponent c) {
  33. 		super(c);
  34. 	}
  35.  
  36. 	@Override
  37. 	public void doOperation() {
  38. 		System.out.print(" ");
  39. 		super.doOperation();
  40. 	}
  41.  
  42.         @Override
  43.         public void newOperation() {
  44.         		super.newOperation();
  45.                 System.out.println("New space operation");
  46.         }	
  47. }
  48.  
  49. class DecoratorComma extends Decorator {
  50.  
  51. 	public DecoratorComma(InterfaceComponent c) {
  52. 		super(c);
  53. 	}
  54.  
  55. 	@Override
  56. 	public void doOperation() {
  57. 		System.out.print(",");
  58. 		super.doOperation();
  59. 	}	
  60.  
  61.         @Override
  62.         public void newOperation() {
  63.         	        		super.newOperation();
  64.  
  65.                 System.out.println("New comma operation");
  66.         }
  67. }
  68.  
  69. class DecoratorHello extends Decorator {
  70.  
  71. 	public DecoratorHello(InterfaceComponent c) {
  72. 		super(c);
  73. 	}
  74.  
  75. 	@Override
  76. 	public void doOperation() {
  77. 		System.out.print("Hello");
  78. 		super.doOperation();
  79. 	}
  80.  
  81.         @Override
  82.         public void newOperation() {
  83.         	        		super.newOperation();
  84.  
  85.                 System.out.println("New hello operation");
  86.         }
  87. }
  88.  
  89. class Main {
  90.  
  91. 	public static void main (String[] args) {
  92. 		Decorator c = new DecoratorHello(new DecoratorSpace(new DecoratorComma(new MainComponent())));
  93. 		c.doOperation(); // Результат выполнения программы "Hello, World!"
  94. 	        c.newOperation(); // New hello operation
  95.         }
  96. }
Success #stdin #stdout 0.06s 380160KB
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Standard input is empty
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Hello ,World!Do Nothing
New hello operation
https://ideone.com/UYrUAU
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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