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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. 	static int a = 10;
  10.  
  11. 	private int b = 5;
  12. 	public void setB(int newB) { this.b = newB; }
  13. 	public int getB() { return this.b; }
  14.  
  15. 	public static void main (String[] args) throws java.lang.Exception {
  16. 		Ideone instance1 = new Ideone();
  17. 		Ideone instance2 = new Ideone();
  18.  
  19. 		System.out.println("Original A");
  20. 		System.out.println(instance1.a);	// 10
  21. 		System.out.println(instance2.a);	// 10
  22. 		System.out.println(Ideone.a);		// 10
  23.  
  24. 		// Modifying `a` modifies _ALL_ instances of Ideone as well
  25. 		Ideone.a = 11;	
  26.  
  27. 		System.out.println("Modified A");
  28. 		System.out.println(instance1.a);	// 11
  29. 		System.out.println(instance2.a);	// 11
  30. 		System.out.println(Ideone.a);		// 11
  31.  
  32. 		System.out.println("Original B");
  33. 		System.out.println(instance1.getB());
  34. 		System.out.println(instance2.getB());
  35.  
  36. 		// This isn't valid since B is a class instance variable!
  37. 		//System.out.println(Ideone.getB()); 
  38.  
  39. 		// Modifying B here only modifies instance1's b
  40. 		instance1.setB(3);
  41.  
  42. 		System.out.println("Modified B");
  43. 		System.out.println(instance1.getB());
  44. 		System.out.println(instance2.getB());
  45. 	}
  46. }
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
Original A
10
10
10
Modified A
11
11
11
Original B
5
5
Modified B
3
5
https://ideone.com/C2mWR2
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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