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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. 		List<String> calculate = new ArrayList<>();
  13. 		calculate.add("2.0");
  14. 		calculate.add("+");
  15. 		calculate.add("2.0");
  16. 		calculate.add("-");
  17. 		calculate.add("1.0");
  18.  
  19. 		Double cV = Double.parseDouble(calculate.get(0));
  20.  
  21. 	    for(int i = 1; i < calculate.size(); i += 2)
  22. 	    {
  23.  
  24. 	        switch(calculate.get(i))
  25. 	        {
  26. 	            case "+":
  27. 	                cV += Double.parseDouble(calculate.get(i + 1));
  28. 	                break;
  29. 	            case "-":
  30. 	                cV -= Double.parseDouble(calculate.get(i + 1));
  31. 	                break;
  32. 	        }
  33. 	    }
  34.  
  35. 	    System.out.println("= " + cV);
  36. 	}
  37. }
Success #stdin #stdout 0.07s 380224KB
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Standard input is empty
stdout
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= 3.0
https://ideone.com/tPcGjl
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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