如何将唯一的值放入数组? [英] How do I put only unique values into an array?

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问题描述

node_marked_array.add(strings[0]);

for (int i = 0; i < strings.length; i++) {
    for (int a = 0; a < strings2.length; a = a + 2) {
        if (node_marked_array.get(i).equals(strings2[a])) {
            if (!node_marked_array.get(i).equals(strings2[a + 1])) {
                //    System.out.println("marked node: " + node_marked_array.get(i) + "=" + strings2[a] + ", added node " + strings2[a+1]);
                node_marked_array.add(strings2[a + 1]);
            }
        }
    }
}

有一个数组名为 strings2 的元素分别是:

I have an array named strings2 of elements each being:


1,2,1,3,2,3,2,4,3,2,5,5,2,

,我的代码应该通过数组,如果它匹配,例如数组中名为的元素的任何元素 {1,2,3,4,5} strings2 的每个偶数元素。它检查上面的数组的 i + 1 元素,以查看元素是否已经添加到标记的数组中,如果不是则添加它。然而,即使在

and my code is supposed to go through the array and if it matches for example any of the element that is in the array called strings: {1,2,3,4,5} with that of strings2 for each even element. It checks the i+1 element of the array above to see if the element is already added to the marked array, if it isn't then it adds it. However I am seeing duplicate values even with

if (!node_marked_array.get(i).equals(strings2[a + 1]))




输出: 1 2 3 3 4 2 5 2 5 5


推荐答案

使用 设置 。数组是这个问题的数据类型错误。

Use Set. Array is the wrong data type for this problem.

它包含一个 .toArray() 方法,将返回一个数组 之后,您构建了该集合,如果这是您需要的。

It contains a .toArray() method that will give you back an array after you've constructed the set, if that is what you require.

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