[Solved] math need a number between -180 and 180

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You could solve it like this:

private static final int MIN = -180;
private static final int MAX = 180;

public static void main(String[] args) {
    System.out.println(keepInRange(-150 + 90));
    System.out.println(keepInRange(0 + 90));
    System.out.println(keepInRange(150 + 90));
    System.out.println(keepInRange(-150 - 90));
}

private static int keepInRange(final int value) {
    if (value < MIN) {
        /*
         * subtract the negative number "MIN" from "value" and
         * add the negative result to "MAX" (which is like subtracting the absolute value
         * of "value" from "MAX)
         */
        return MAX + (value - MIN);
    }
    if (value > MAX) {
        /*
         * subtract the number "MAX" from "value" and to get exceeding number
         * add it to "MIN"
         */
        return MIN + (value - MAX);
    }
    return value;
}

The output is:

-60
90
-120
120

According to your explanation, the last to values should be -120 and 120 and not -60 and 60 like you said in your example. The exceeding amount should be added to the “other” bound, and not from 0. 150 + 90 is 240, so it exceeds the MAX bound by 60. This then should be added to the MIN bound. The result is -120.

If this is not correct, then please update your question.

solved math need a number between -180 and 180