twoTimesSolution

public class twoTimes{
    public static boolean twoTimes(int[] arr){
        if (arr.length%2!=0){return false;}
        int counterA=1;
        int counterB=0;
        int positionA=0;
        int positionB=1;
        int currentNumber=arr[positionA];
        while(positionB<arr.length){
            if (arr[positionB]==arr[positionA]){
                counterA++;
            }
            positionB++;
            if(positionB==arr.length){
                if(counterA==2){
                    counterB++;
                    positionA++;
                    positionB=positionA+1;
                    counterA=1;
                }
                    else {
                        positionA++;
                        positionB=positionA+1;
                        counterA=1;
                    }
                }
            }
            return (counterB==arr.length/2);
        }
}