如何使用java从两个数组中获取不常见元素

我有两个字符串数组

array1={"Hardware Docs","Customer Data","Customer Docs","Commit Reviews","Product Planning Docs","Business Operations ","Proprietary"};
array2={"Hardware Docs","Customer Docs"};

我想从这两个数组中得到不常见的字符串。有人能建议怎么做吗

    String [] array1={"Hardware Docs","Customer Data","Customer Docs","Commit Reviews","Product Planning Docs","Business Operations ","Proprietary"};
    String[] array2={"Hardware Docs","Customer Docs"};

    ArrayList<String> filter1 = new ArrayList<>();

    for(String str1: array1){
        boolean match = false;
        for(String str2: array2){
            if(str1.equals(str2))
                match = true;
        }
        if(!match)
            filter1.add(str1);
    }

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但这是苏蛮力。如果性能对您很重要，您应该寻找更好的解决方案

您所说的不寻常是什么意思？存在于一个而不是另一个？将数组转换为列表，然后在注释中引用帖子。我们如何用javascript编写相同的代码？