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RemoveDuplicates2.java

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package Algorithms.array;

public class RemoveDuplicates2 {

public static int removeDuplicates(int[] A) {

if (A == null) {

return 0;

}

if (A.length <= 1) {

return A.length;

}

int len = 1;

// 拷贝2次后就不再拷贝

boolean canCopy = true;

for (int i = 1; i < A.length; i++) {

if (A[i] == A[i - 1]) {

if (!canCopy) {

continue;

}

canCopy = false;

} else {

canCopy = true;

}

A[len++] = A[i];

}

return len;

}

public static void main(String[] strs) {

int[] A = {1,1,1,2,2,3};

removeDuplicates(A);

for (int i: A) {

System.out.print(i + " ");

}

}

}