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Thread: Update Values Globally

  1. #1
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    Question Update Values Globally

    Is there any way to update values globally? More specifically, boolean value. I'm trying to make a subroutine that "toggles" the given value, but it only does it locally. I've also tried hashmaps, but that's local also. Here' the test code I came up with:
    import java.util.Map;
    import java.util.HashMap;
    public class booltest {
    	private static boolean isFalse = false;
    	public static boolean isTrue = true;
        public static Map<String, Boolean> settings = new HashMap();
    	public static void main (String args[]){
    		settings.put("Test", false);
    		System.out.println(String.valueOf(settings.get("Test")));
    		toggleOnOff("Test");
    		System.out.println(settings.get("Test"));
    		toggleOnOff("Test");
    		System.out.println(String.valueOf(settings.get("Test")));
    		hashmaptest();
    	}
    	private static void toggleOnOff(String Value){
    		if (settings.get(Value).equals(isFalse))
    			settings.put(Value, true);
    		if (settings.get(Value).equals(isTrue))
    			settings.put(Value, false);
    	}
    	private static void hashmaptest(){
    		Map<String, Boolean> test =new HashMap();
    		test.put("test", false);
    		System.out.println(String.valueOf(test.get("test")));
    		test.put("test", true);
    		System.out.println(String.valueOf(test.get("test")));
    		test.put("test", false);
    		System.out.println(String.valueOf(test.get("test")));
    	}
    }


  2. #2
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    Default Re: Update Values Globally

    Can you explain your problem in more details, especially what you mean by globally and locally. Technically there is no such thing as global in Java.

  3. #3
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    Default Re: Update Values Globally

    I think I know what your problem is: the toggleOnOff method.

    Initially the boolean value of the "Test" key is false. In the method the first if statment is true so it resets the value to true. It then looks at the second if statement. Since this is now true (die to the above change) it enters the second if statement as well and resets the value back to false.

  4. The Following 2 Users Say Thank You to Junky For This Useful Post:

    JavaPF (June 10th, 2011), techwiz24 (June 10th, 2011)

  5. #4
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    Default Re: Update Values Globally

    You have no idea how much of an "oooooohhhhhhhh, DUH!" moment I had when I read that! Thanks, sometimes it just takes someone else to look at it, thanks a million, problem fixed!

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