Java array sort

List<Integer> list = Arrays.asList(array1); 		

list.stream()
        .sorted()
        .forEach(i -> System.out.println(i));

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public static void main(String[] args) {

    int array1[]= {12, 23, -22, 0, 43, 545, -4, -55, 43, 12, 0, -999, -87};

    System.out.println("Array 1 :");

    Arrays.sort(array1);

    for (int positive: array1) {

        if (positive >= -1)
            System.out.println("Positive numbers :" + positive+ "\t");
        }
        System.out.println();
        System.out.println("Array 2 :");

        for (int negative: array1) {
            if (negative >= -1) {

            }else{ System.out.println("Negative numbers :" +negative);
            }

        } 
        System.out.println();

        for (int i = 0; i < array1.length -1; i++) { 
             if (array1[/i + 1 ] == array1) {
                 System.out.println("Duplicate element found :" + array1);
                 i = i + 1;

             }     
}
} 
}

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List<Integer> list = Arrays.asList(array1);
		
List<Integer> positiveList = new ArrayList<Integer>();
List<Integer> negativeList = new ArrayList<Integer>();
List<Integer> duplicateList = new ArrayList<Integer>();
		
list.stream()
        .sorted()
        .forEach(i -> {	
        			if ((positiveList.contains(i) || negativeList.contains(i)) && !duplicateList.contains(i)) duplicateList.add(i);
        			if (i >= 0) {positiveList.add(i); System.out.println("found pos");}
        			if (i < 0) negativeList.add(i); 
        			});
		
		System.out.println(positiveList);
		System.out.println(negativeList);
		System.out.println(duplicateList);

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