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  1. import java.util.Random;
  2.  
  3. class MethodSequenceDesign {
  4.  
  5. 	public static final int STATE_WAIT = 0;
  6. 	public static final int STATE_A_RUNNING = 1;
  7. 	public static final int STATE_A_FAIL = 2;
  8. 	public static final int STATE_B_RUNNING = 3;
  9. 	public static final int STATE_B_FAIL = 4;
  10. 	public static final int STATE_C_RUNNING = 5;
  11. 	public static final int STATE_C_FAIL = 6;
  12. 	public static final int STATE_END = 7;
  13.  
  14. 	static int status = STATE_WAIT;
  15.  
  16. 	public void start() {
  17. 		if (!methodA()) {
  18. 			status = STATE_A_FAIL;
  19. 			return;
  20. 		}
  21. 		if (!methodB()) {
  22. 			status = STATE_A_FAIL;
  23. 			return;
  24. 		}
  25. 		if (!methodC()) {
  26. 			status = STATE_A_FAIL;
  27. 			return;
  28. 		}
  29. 		status = STATE_END;
  30. 	}
  31.  
  32. 	public boolean methodA() {
  33. 		status = STATE_A_RUNNING;
  34. 		String str = "do some operation in method A";
  35. 		System.out.println(str);
  36. 		return randomBoolean();
  37.  
  38. 	}
  39.  
  40. 	public boolean methodB() {
  41. 		status = STATE_B_RUNNING;
  42. 		String str = "do some operation in method B";
  43. 		System.out.println(str);
  44. 		return randomBoolean();
  45.  
  46. 	}
  47.  
  48. 	public boolean methodC() {
  49. 		status = STATE_C_RUNNING;
  50. 		String str = "do some operation in method C";
  51. 		System.out.println(str);
  52. 		return randomBoolean();
  53. 	}
  54.  
  55. 	public static void main(String[] args) {
  56. 		MethodSequenceDesign method = new MethodSequenceDesign();
  57. 		method.start();
  58. 		System.out.println("Findal state = " + status);
  59. 	}
  60.  
  61. 	public boolean randomBoolean() {
  62. 		Random random = new Random();
  63. 		return random.nextBoolean();
  64. 	}
  65. }
  66.  
Success #stdin #stdout 0.1s 27960KB
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Standard input is empty
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do some operation in method A
do some operation in method B
Findal state = 2
https://ideone.com/4Rw0Zs
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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